panic: runtime error: invalid memory address or nil pointer dereference

[Georgi87]

After I suddenly got some blocks with invalid parents I tried to restart the client and got this error:

geth --mine --rpc --unlock primary --maxpeers 0 --minerthreads 2 --networkid 0
Welcome to the FRONTIER
I0413 13:22:19.282031    4523 backend.go:180] Protocol Version: 60, Network Id: 0
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x4b573a]

goroutine 1 [running]:
github.com/ethereum/go-ethereum/core/types.(*Block).Hash(0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/core/types/block.go:313 +0xca
github.com/ethereum/go-ethereum/core.(*ChainManager).setLastBlock(0xc2081295f0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/core/chain_manager.go:177 +0x152
github.com/ethereum/go-ethereum/core.NewChainManager(0x7f34e1562948, 0xc20803d6b0, 0x7f34e1562948, 0xc2081088d0, 0xc208628ba0, 0x2)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/core/chain_manager.go:99 +0x1ba
github.com/ethereum/go-ethereum/eth.New(0xc208034dd0, 0x4, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/eth/backend.go:196 +0xd7b
main.run(0xc2080c27e0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:262 +0x6d
github.com/codegangsta/cli.(*App).Run(0xc2080ea000, 0xc20800a000, 0xb, 0xb, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/codegangsta/cli/app.go:182 +0xe5c
main.main()
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:253 +0xb6

goroutine 5 [select]:
github.com/ethereum/go-ethereum/logger.dispatchLoop()
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:65 +0x6d1
created by github.com/ethereum/go-ethereum/logger.init·1
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:44 +0x25

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/lib/go/src/runtime/asm_amd64.s:2232 +0x1

goroutine 6 [chan receive]:
github.com/ethereum/go-ethereum/logger/glog.(*loggingT).flushDaemon(0x125a0c0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/glog/glog.go:897 +0x78
created by github.com/ethereum/go-ethereum/logger/glog.init·1
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/glog/glog.go:428 +0x77

goroutine 8 [syscall]:
os/signal.loop()
    /usr/lib/go/src/os/signal/signal_unix.go:21 +0x1f
created by os/signal.init·1
    /usr/lib/go/src/os/signal/signal_unix.go:27 +0x35

goroutine 9 [chan receive]:
github.com/ethereum/go-ethereum/cmd/utils.func·001()
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/utils/cmd.go:52 +0x116
created by github.com/ethereum/go-ethereum/cmd/utils.HandleInterrupt
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/utils/cmd.go:56 +0xb5

goroutine 10 [chan receive]:
github.com/ethereum/go-ethereum/p2p/nat.func·004(0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:141 +0x175
github.com/ethereum/go-ethereum/p2p/nat.func·005()
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:184 +0x2f
created by github.com/ethereum/go-ethereum/p2p/nat.startautodisc
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:184 +0x19c

goroutine 18 [chan receive]:
github.com/ethereum/go-ethereum/p2p/nat.discoverUPnP(0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:111 +0x109
github.com/ethereum/go-ethereum/p2p/nat.func·002()
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:138 +0x28
created by github.com/ethereum/go-ethereum/p2p/nat.func·004
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:138 +0xcb

goroutine 19 [select]:
github.com/ethereum/go-ethereum/p2p/nat.discoverPMP(0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natpmp.go:70 +0x39d
github.com/ethereum/go-ethereum/p2p/nat.func·003()
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:139 +0x28
created by github.com/ethereum/go-ethereum/p2p/nat.func·004
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:139 +0x121

goroutine 20 [IO wait]:
net.(*pollDesc).Wait(0xc208126060, 0x72, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:84 +0x47
net.(*pollDesc).WaitRead(0xc208126060, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:89 +0x43
net.(*netFD).readFrom(0xc208126000, 0xc20806b800, 0x800, 0x800, 0x0, 0x0, 0x0, 0x7f34e155f1c8, 0xc2080b16e0)
    /usr/lib/go/src/net/fd_unix.go:269 +0x4a1
net.(*UDPConn).ReadFromUDP(0xc2080fc018, 0xc20806b800, 0x800, 0x800, 0x4584b0, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/udpsock_posix.go:67 +0x124
net.(*UDPConn).ReadFrom(0xc2080fc018, 0xc20806b800, 0x800, 0x800, 0x800, 0x0, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/udpsock_posix.go:82 +0x12e
github.com/huin/goupnp/httpu.(*HTTPUClient).Do(0xc20801e860, 0xc208128000, 0x7d2b7500, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/httpu/httpu.go:92 +0xba4
github.com/huin/goupnp/ssdp.SSDPRawSearch(0xc20801e860, 0xcbfbd0, 0x31, 0x2, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/ssdp/ssdp.go:53 +0x654
github.com/huin/goupnp.DiscoverDevices(0xcbfbd0, 0x31, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/goupnp.go:55 +0x129
github.com/ethereum/go-ethereum/p2p/nat.discover(0xc2080fe060, 0xcbfbd0, 0x31, 0xe22160)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:119 +0x40
created by github.com/ethereum/go-ethereum/p2p/nat.discoverUPnP
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:97 +0x84

goroutine 21 [IO wait]:
net.(*pollDesc).Wait(0xc2081261b0, 0x72, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:84 +0x47
net.(*pollDesc).WaitRead(0xc2081261b0, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:89 +0x43
net.(*netFD).readFrom(0xc208126150, 0xc208124000, 0x800, 0x800, 0x0, 0x0, 0x0, 0x7f34e155f1c8, 0xc2080b1710)
    /usr/lib/go/src/net/fd_unix.go:269 +0x4a1
net.(*UDPConn).ReadFromUDP(0xc2080fc020, 0xc208124000, 0x800, 0x800, 0x4584b0, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/udpsock_posix.go:67 +0x124
net.(*UDPConn).ReadFrom(0xc2080fc020, 0xc208124000, 0x800, 0x800, 0x800, 0x0, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/udpsock_posix.go:82 +0x12e
github.com/huin/goupnp/httpu.(*HTTPUClient).Do(0xc20801ea20, 0xc2081281a0, 0x7d2b7500, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/httpu/httpu.go:92 +0xba4
github.com/huin/goupnp/ssdp.SSDPRawSearch(0xc20801ea20, 0xcbfc30, 0x31, 0x2, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/ssdp/ssdp.go:53 +0x654
github.com/huin/goupnp.DiscoverDevices(0xcbfc30, 0x31, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/goupnp.go:55 +0x129
github.com/ethereum/go-ethereum/p2p/nat.discover(0xc2080fe060, 0xcbfc30, 0x31, 0xe22168)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:119 +0x40
created by github.com/ethereum/go-ethereum/p2p/nat.discoverUPnP
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:109 +0xbd

goroutine 22 [IO wait]:
net.(*pollDesc).Wait(0xc208126300, 0x72, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:84 +0x47
net.(*pollDesc).WaitRead(0xc208126300, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:89 +0x43
net.(*netFD).readFrom(0xc2081262a0, 0xc2080f8220, 0xc, 0xc, 0x0, 0x0, 0x0, 0x7f34e155f1c8, 0xc2080f8230)
    /usr/lib/go/src/net/fd_unix.go:269 +0x4a1
net.(*UDPConn).ReadFromUDP(0xc2080fc028, 0xc2080f8220, 0xc, 0xc, 0x2, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/udpsock_posix.go:67 +0x124
github.com/jackpal/go-nat-pmp.(*Client).rpc(0xc20801ea40, 0xc20805aede, 0x2, 0x2, 0xc, 0xc2080f8220, 0xc, 0xc, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/jackpal/go-nat-pmp/natpmp.go:126 +0x37a
github.com/jackpal/go-nat-pmp.(*Client).GetExternalAddress(0xc20801ea40, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/jackpal/go-nat-pmp/natpmp.go:50 +0xc8
github.com/ethereum/go-ethereum/p2p/nat.func·006()
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natpmp.go:57 +0xa5
created by github.com/ethereum/go-ethereum/p2p/nat.discoverPMP
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natpmp.go:62 +0x1a1

goroutine 44 [chan receive]:
github.com/ethereum/go-ethereum/logger.sysLoop(0x7f34e155fcb8, 0xc2080b1260, 0xc2085529c0, 0xc20801ef60)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:101 +0x5a
created by github.com/ethereum/go-ethereum/logger.func·001
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:61 +0x176

goroutine 12 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0xc208031680)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x284
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x7dd

goroutine 13 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0xc208031680)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x877
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x821

goroutine 14 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0xc208031680)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x21a
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x83b

goroutine 15 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0xc208031680)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x197
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x855

goroutine 16 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0xc20803d6b0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x46e
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x1c5

goroutine 34 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0xc208030d80)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x284
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x7dd

goroutine 35 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0xc208030d80)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x877
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x821

goroutine 36 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0xc208030d80)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x21a
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x83b

goroutine 37 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0xc208030d80)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x197
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x855

goroutine 38 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0xc2081088d0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x46e
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x1c5

goroutine 39 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0xc2080318c0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x284
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x7dd

goroutine 40 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0xc2080318c0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x877
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x821

goroutine 41 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0xc2080318c0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x21a
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x83b

goroutine 42 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0xc2080318c0)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x197
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x855

goroutine 43 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0xc208628900)
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x46e
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    /build/buildd/ethereum-0.9.8+381SNAPSHOT20150410092008trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x1c5

[zelig]

please always state at least version or branch & revision you built from. fast moving target...

[Georgi87]

Sorry forgot: I installed the latest dev version using the building instructions on ubuntu. How can I get the revision?

Welcome to the FRONTIER
Geth
Version: 0.9.8
Protocol Version: 60
Network Id: 0
GO: go1.4.2
OS: linux
GOPATH=
GOROOT=/usr/lib/go

[fjl]

The current version is 0.9.9. I believe this issue is supposed to be fixed on develop.

[Georgi87]

My bad, upgraded now to 0.9.9

The error is still there:

stefan@ubuntu:~$ geth --mine --rpc --unlock primary --maxpeers 0 --minerthreads 1 --networkid 0
Welcome to the FRONTIER
I0413 16:14:16.255112   47666 backend.go:183] Protocol Version: 60, Network Id: 0
I0413 16:14:16.255494   47666 backend.go:193] Blockchain DB Version: 1
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x4b8e2a]

goroutine 1 [running]:
github.com/ethereum/go-ethereum/core/types.(*Block).Hash(0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/core/types/block.go:313 +0xca
github.com/ethereum/go-ethereum/core.(*ChainManager).setLastBlock(0xc2080b6410)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/core/chain_manager.go:177 +0x152
github.com/ethereum/go-ethereum/core.NewChainManager(0x7ff6f41fcc68, 0xc2080e68a0, 0x7ff6f41fcc68, 0xc2080e6a80, 0xc2080c9170, 0x1)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/core/chain_manager.go:99 +0x1ba
github.com/ethereum/go-ethereum/eth.New(0xc2080722a0, 0x4, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/eth/backend.go:209 +0x1218
main.run(0xc2080721c0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:278 +0x6d
github.com/codegangsta/cli.(*App).Run(0xc2080bc000, 0xc20800a000, 0xb, 0xb, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/codegangsta/cli/app.go:182 +0xe5c
main.main()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:269 +0xc7

goroutine 6 [select]:
github.com/ethereum/go-ethereum/logger.dispatchLoop()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:65 +0x6d1
created by github.com/ethereum/go-ethereum/logger.init·1
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:44 +0x25

goroutine 7 [chan receive]:
github.com/ethereum/go-ethereum/logger/glog.(*loggingT).flushDaemon(0x12c9ea0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/glog/glog.go:897 +0x78
created by github.com/ethereum/go-ethereum/logger/glog.init·1
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/glog/glog.go:428 +0x77

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/lib/go/src/runtime/asm_amd64.s:2232 +0x1

goroutine 9 [syscall]:
os/signal.loop()
    /usr/lib/go/src/os/signal/signal_unix.go:21 +0x1f
created by os/signal.init·1
    /usr/lib/go/src/os/signal/signal_unix.go:27 +0x35

goroutine 10 [IO wait]:
net.(*pollDesc).Wait(0xc2080ec1b0, 0x72, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:84 +0x47
net.(*pollDesc).WaitRead(0xc2080ec1b0, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:89 +0x43
net.(*netFD).accept(0xc2080ec150, 0x0, 0x7ff6f41fa2c8, 0xc20802abb0)
    /usr/lib/go/src/net/fd_unix.go:419 +0x40b
net.(*TCPListener).AcceptTCP(0xc208036068, 0x6252d4, 0x0, 0x0)
    /usr/lib/go/src/net/tcpsock_posix.go:234 +0x4e
net/http.tcpKeepAliveListener.Accept(0xc208036068, 0x0, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/http/server.go:1976 +0x4c
net/http.(*Server).Serve(0xc208102000, 0x7ff6f41fcb90, 0xc208036068, 0x0, 0x0)
    /usr/lib/go/src/net/http/server.go:1728 +0x92
net/http.(*Server).ListenAndServe(0xc208102000, 0x0, 0x0)
    /usr/lib/go/src/net/http/server.go:1718 +0x154
net/http.ListenAndServe(0xc42770, 0xe, 0x0, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/http/server.go:1808 +0xba
main.func·006()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:263 +0x48
created by main.main
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:264 +0x31

goroutine 11 [chan receive]:
github.com/ethereum/go-ethereum/cmd/utils.func·001()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/utils/cmd.go:52 +0x116
created by github.com/ethereum/go-ethereum/cmd/utils.HandleInterrupt
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/cmd/utils/cmd.go:56 +0xb5

goroutine 12 [chan receive]:
github.com/ethereum/go-ethereum/p2p/nat.func·004(0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:141 +0x175
github.com/ethereum/go-ethereum/p2p/nat.func·005()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:184 +0x2f
created by github.com/ethereum/go-ethereum/p2p/nat.startautodisc
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:184 +0x19c

goroutine 18 [chan receive]:
github.com/ethereum/go-ethereum/p2p/nat.discoverUPnP(0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:111 +0x109
github.com/ethereum/go-ethereum/p2p/nat.func·002()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:138 +0x28
created by github.com/ethereum/go-ethereum/p2p/nat.func·004
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:138 +0xcb

goroutine 19 [select]:
github.com/ethereum/go-ethereum/p2p/nat.discoverPMP(0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natpmp.go:70 +0x39d
github.com/ethereum/go-ethereum/p2p/nat.func·003()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:139 +0x28
created by github.com/ethereum/go-ethereum/p2p/nat.func·004
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:139 +0x121

goroutine 20 [sleep]:
github.com/huin/goupnp/httpu.(*HTTPUClient).Do(0xc208101280, 0xc2080349c0, 0x7d2b7500, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/httpu/httpu.go:84 +0xabe
github.com/huin/goupnp/ssdp.SSDPRawSearch(0xc208101280, 0xd10610, 0x31, 0x2, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/ssdp/ssdp.go:53 +0x654
github.com/huin/goupnp.DiscoverDevices(0xd10610, 0x31, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/goupnp.go:55 +0x129
github.com/ethereum/go-ethereum/p2p/nat.discover(0xc208102120, 0xd10610, 0x31, 0xe75d70)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:119 +0x40
created by github.com/ethereum/go-ethereum/p2p/nat.discoverUPnP
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:97 +0x84

goroutine 21 [sleep]:
github.com/huin/goupnp/httpu.(*HTTPUClient).Do(0xc208100100, 0xc208034270, 0x7d2b7500, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/httpu/httpu.go:84 +0xabe
github.com/huin/goupnp/ssdp.SSDPRawSearch(0xc208100100, 0xd10670, 0x31, 0x2, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/ssdp/ssdp.go:53 +0x654
github.com/huin/goupnp.DiscoverDevices(0xd10670, 0x31, 0x0, 0x0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/huin/goupnp/goupnp.go:55 +0x129
github.com/ethereum/go-ethereum/p2p/nat.discover(0xc208102120, 0xd10670, 0x31, 0xe75d78)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:119 +0x40
created by github.com/ethereum/go-ethereum/p2p/nat.discoverUPnP
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natupnp.go:109 +0xbd

goroutine 22 [IO wait]:
net.(*pollDesc).Wait(0xc2080ec680, 0x72, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:84 +0x47
net.(*pollDesc).WaitRead(0xc2080ec680, 0x0, 0x0)
    /usr/lib/go/src/net/fd_poll_runtime.go:89 +0x43
net.(*netFD).readFrom(0xc2080ec620, 0xc20802ab20, 0xc, 0xc, 0x0, 0x0, 0x0, 0x7ff6f41fa2c8, 0xc20802ab30)
    /usr/lib/go/src/net/fd_unix.go:269 +0x4a1
net.(*UDPConn).ReadFromUDP(0xc208036040, 0xc20802ab20, 0xc, 0xc, 0x2, 0x0, 0x0, 0x0)
    /usr/lib/go/src/net/udpsock_posix.go:67 +0x124
github.com/jackpal/go-nat-pmp.(*Client).rpc(0xc2081011c0, 0xc20808bede, 0x2, 0x2, 0xc, 0xc20802ab20, 0xc, 0xc, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/jackpal/go-nat-pmp/natpmp.go:126 +0x37a
github.com/jackpal/go-nat-pmp.(*Client).GetExternalAddress(0xc2081011c0, 0x0, 0x0, 0x0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/jackpal/go-nat-pmp/natpmp.go:50 +0xc8
github.com/ethereum/go-ethereum/p2p/nat.func·006()
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natpmp.go:57 +0xa5
created by github.com/ethereum/go-ethereum/p2p/nat.discoverPMP
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/p2p/nat/natpmp.go:62 +0x1a1

goroutine 14 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0xc20802d680)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x284
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x7dd

goroutine 15 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0xc20802d680)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x877
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x821

goroutine 16 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0xc20802d680)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x21a
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x83b

goroutine 34 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0xc20802d680)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x197
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x855

goroutine 35 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0xc2080e68a0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x46e
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x1c5

goroutine 36 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0xc20802d200)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x284
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x7dd

goroutine 37 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0xc20802d200)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x877
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x821

goroutine 38 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0xc20802d200)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x21a
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x83b

goroutine 39 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0xc20802d200)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x197
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x855

goroutine 40 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0xc2080e6a80)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x46e
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x1c5

goroutine 41 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0xc20802d8c0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x284
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x7dd

goroutine 42 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0xc20802d8c0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x877
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x821

goroutine 43 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0xc20802d8c0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x21a
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x83b

goroutine 44 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0xc20802d8c0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x197
created by github.com/syndtr/goleveldb/leveldb.openDB
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x855

goroutine 45 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0xc2080c8cc0)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x46e
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x1c5

goroutine 23 [chan receive]:
github.com/ethereum/go-ethereum/logger.sysLoop(0x7ff6f41fb200, 0xc2080e9be0, 0xc20805c5a0, 0xc20801f960)
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:101 +0x5a
created by github.com/ethereum/go-ethereum/logger.func·001
    /build/buildd/ethereum-0.9.9+393SNAPSHOT20150413215505trusty/obj-x86_64-linux-gnu/src/github.com/ethereum/go-ethereum/logger/sys.go:61 +0x176

[fjl]

Please delete ~/.ethereum once before running geth.

[Georgi87]

I deleted it and still have the issue that I get Invalid Block and cannot continue mining:

I0413 23:39:58.011499   48125 chain_manager.go:484] INVALID block #294 (2965e325)
I0413 23:39:58.011566   48125 chain_manager.go:485] Block's parent unknown 811d808e62a75665058879b51167347d8ee1fee2f13578650b25707835f8bf05
I0413 23:39:58.011935   48125 worker.go:314] commit new work on block 294 with 0 txs & 0 uncles

After I sent the following transaction to the network:

data: "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" 
from: "0x54b0c552ab7ad338bb55b4caffab5b85d7e1a1e2" 
gas: "0x2dc6c0"
gasPrice: "0x15f90"
to: "0x314b0344530609a88ce6f8e515bbd5a455bc08a7"
value: "0x8ac7230489e80000"

After restarting geth I get the stack trace of my last comment,

[Georgi87]

Even if I delete the .ethereum folder I still have the old DAG cache. Are there other folder I should delete upon upgrade go-ethereum?

[zelig]

no other files. /tmp/dag is relevant only if you are mining. This will change when #555 is done.

[Georgi87]

Seems to be fixed with latest version! Thanks :)

[Georgi87]

Unfortunately the error still exists. Sometimes sending transactions to contracts causes the geth to fail due to an unknown block parent.

[obscuren]

Could you give me an example?

[bt-cryptomancer]

I am also experiencing this error, running geth on Windows 8. I updated my code to the very latest version and re-built geth, and deleted the Ethereum folder from C:\Users...\AppData\Roaming just to be safe.

When running geth with no arguments, I get this error:

Welcome to the FRONTIER
I0418 12:40:26.989963    2300 backend.go:184] Protocol Version: 60, Network Id: 0
I0418 12:40:26.989963    2300 backend.go:194] Blockchain DB Version: 1
I0418 12:40:26.991963    2300 chain_manager.go:186] Last block (#0) fd4af92a79c7fc2fd8bf0d342f2e832e1d4f485c85b9152d2039e03bc604fdca TD=0
I0418 12:40:26.991963    2300 ethash.go:94] Making cache
I0418 12:40:31.358561    2300 ethash.go:99] Took: 4.3665977s
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x0 pc=0x63106b]

goroutine 1 [running]:
sync/atomic.LoadUint64(0x13045944, 0x144b9da0, 0x12ffba00)
    c:/go/src/sync/atomic/asm_386.s:165 +0xb
github.com/ethereum/go-ethereum/miner.(*worker).commitNewWork(0x130458c0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/miner/worker.go:319 +0x4dc
github.com/ethereum/go-ethereum/miner.newWorker(0x0, 0x0, 0x0, 0x0, 0x0, 0x31aa98, 0x130441b0, 0x8)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/miner/worker.go:106 +0x27f
github.com/ethereum/go-ethereum/miner.New(0x31aa98, 0x130441b0, 0x31aa58, 0x1303bf20, 0x8, 0x130455f0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/miner/miner.go:27 +0x49
github.com/ethereum/go-ethereum/eth.New(0x12f50150, 0x4, 0x0, 0x0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/eth/backend.go:217 +0x145d
main.run(0x12f500e0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:278 +0x53
github.com/codegangsta/cli.(*App).Run(0x12fae900, 0x12f420e0, 0x1, 0x1, 0x0, 0x0)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/codegangsta/cli/app.go:182 +0xc03
main.main()
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:269 +0xa3

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    c:/go/src/runtime/asm_386.s:2287 +0x1

goroutine 6 [select]:
github.com/ethereum/go-ethereum/logger.dispatchLoop()
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/logger/sys.go:65 +0x58c
created by github.com/ethereum/go-ethereum/logger.init·1
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/logger/sys.go:44 +0x25

goroutine 7 [chan receive]:
github.com/ethereum/go-ethereum/logger/glog.(*loggingT).flushDaemon(0xedf620)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/logger/glog/glog.go:897 +0x76
created by github.com/ethereum/go-ethereum/logger/glog.init·1
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/logger/glog/glog.go:428 +0x6e

goroutine 9 [syscall]:
os/signal.loop()
    c:/go/src/os/signal/signal_unix.go:21 +0x21
created by os/signal.init·1
    c:/go/src/os/signal/signal_unix.go:27 +0x34

goroutine 10 [IO wait]:
net.(*pollDesc).Wait(0x1302e1b0, 0x72, 0x0, 0x0)
    c:/go/src/net/fd_poll_runtime.go:84 +0x42
net.(*ioSrv).ExecIO(0x13012000, 0x1302e118, 0xa3c958, 0x8, 0x13036038, 0x1302e2a0, 0x0, 0x0)
    c:/go/src/net/fd_windows.go:188 +0x265
net.(*netFD).acceptOne(0x1302e0e0, 0x1302e1c0, 0x2, 0x2, 0x1302e118, 0x419398, 0x0, 0x0)
    c:/go/src/net/fd_windows.go:558 +0x3ee
net.(*netFD).accept(0x1302e0e0, 0x0, 0x0, 0x0)
    c:/go/src/net/fd_windows.go:585 +0x119
net.(*TCPListener).AcceptTCP(0x13036030, 0x12f21200, 0x0, 0x0)
    c:/go/src/net/tcpsock_posix.go:234 +0x48
net/http.tcpKeepAliveListener.Accept(0x13036030, 0x0, 0x0, 0x0, 0x0)
    c:/go/src/net/http/server.go:1976 +0x48
net/http.(*Server).Serve(0x12f9e000, 0x317198, 0x13036030, 0x0, 0x0)
    c:/go/src/net/http/server.go:1728 +0x7b
net/http.(*Server).ListenAndServe(0x12f9e000, 0x0, 0x0)
    c:/go/src/net/http/server.go:1718 +0x101
net/http.ListenAndServe(0xa6afb8, 0xe, 0x0, 0x0, 0x0, 0x0)
    c:/go/src/net/http/server.go:1808 +0x9e
main.func·006()
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:263 +0x3e
created by main.main
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/cmd/geth/main.go:264 +0x28

goroutine 11 [chan receive]:
github.com/ethereum/go-ethereum/cmd/utils.func·001()
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/cmd/utils/cmd.go:52 +0xcf
created by github.com/ethereum/go-ethereum/cmd/utils.HandleInterrupt
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/cmd/utils/cmd.go:56 +0xa0

goroutine 12 [chan send]:
github.com/ethereum/go-ethereum/p2p/nat.func·005()
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:184 +0x59
created by github.com/ethereum/go-ethereum/p2p/nat.startautodisc
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/p2p/nat/nat.go:184 +0x160

goroutine 62 [select]:
github.com/ethereum/go-ethereum/event/filter.(*Filters).loop(0x1304a190)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/event/filter/filter.go:57 +0x260
created by github.com/ethereum/go-ethereum/event/filter.(*Filters).Start
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/event/filter/filter.go:32 +0x2f

goroutine 65 [chan receive]:
github.com/ethereum/go-ethereum/logger.sysLoop(0x315cc8, 0x12f42c08, 0x12f9f2c0, 0x12f81340)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/logger/sys.go:101 +0x50
created by github.com/ethereum/go-ethereum/logger.func·001
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/logger/sys.go:61 +0x134

goroutine 13 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0x12fcc700)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x246
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x6be

goroutine 14 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0x12fcc700)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x68e
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x6f8

goroutine 15 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0x12fcc700)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x1e0
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x70d

goroutine 16 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0x12fcc700)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x150
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x722

goroutine 50 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0x1300e500)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x38a
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x182

goroutine 51 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0x12fcc8c0)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x246
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x6be

goroutine 52 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0x12fcc8c0)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x68e
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x6f8

goroutine 53 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0x12fcc8c0)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x1e0
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x70d

goroutine 54 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0x12fcc8c0)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x150
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x722

goroutine 55 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0x12fabee0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x38a
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x182

goroutine 56 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).compactionError(0x12fcca80)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:111 +0x246
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:116 +0x6be

goroutine 57 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).tCompaction(0x12fcca80)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:666 +0x68e
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:119 +0x6f8

goroutine 58 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).mCompaction(0x12fcca80)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_compaction.go:615 +0x1e0
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:120 +0x70d

goroutine 59 [select]:
github.com/syndtr/goleveldb/leveldb.(*DB).jWriter(0x12fcca80)
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db_write.go:37 +0x150
created by github.com/syndtr/goleveldb/leveldb.openDB
    c:/Central/source/go/src/github.com/ethereum/go-ethereum/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/db.go:121 +0x722

goroutine 60 [select]:
github.com/ethereum/go-ethereum/ethdb.(*LDBDatabase).update(0x1301e4c0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/ethdb/database.go:127 +0x38a
created by github.com/ethereum/go-ethereum/ethdb.NewLDBDatabase
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/ethdb/database.go:38 +0x182

goroutine 61 [select]:
github.com/ethereum/go-ethereum/core.(*ChainManager).update(0x130455f0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/core/chain_manager.go:593 +0x4ff
created by github.com/ethereum/go-ethereum/core.NewChainManager
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/core/chain_manager.go:107 +0x2ca

goroutine 63 [select]:
github.com/ethereum/go-ethereum/miner.(*worker).update(0x130458c0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/miner/worker.go:158 +0x766
created by github.com/ethereum/go-ethereum/miner.newWorker
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/miner/worker.go:103 +0x25c

goroutine 64 [chan receive]:
github.com/ethereum/go-ethereum/miner.(*worker).wait(0x130458c0)
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/miner/worker.go:191 +0x61
created by github.com/ethereum/go-ethereum/miner.newWorker
    C:/Central/Source/go/src/github.com/ethereum/go-ethereum/miner/worker.go:104 +0x271

Here's the output of doing geth version:

Welcome to the FRONTIER
Geth
Version: 0.9.9
Protocol Version: 60
Network Id: 0
GO: go1.4.2
OS: windows
GOPATH=C:\Central\Source\go
GOROOT=C:\Go\

[Georgi87]

Only happens to me sometimes, when I send a transaction like the following:

data: "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" 
from: "0x54b0c552ab7ad338bb55b4caffab5b85d7e1a1e2" 
gas: "0x2dc6c0"
gasPrice: "0x15f90"
to: "0x314b0344530609a88ce6f8e515bbd5a455bc08a7"
value: "0x8ac7230489e80000"