kitex v0.5.x server mux netpoll panic #913
Description
使用Kitex v0.5.1 版本，开启多路复用，server偶尔会有以下panic发生，大家有遇到过类似问题吗？
client / server 双端都已开启mux transport
客户端连接数配置 connection=1
GOPOOL: panic in pool: gopool.DefaultPool: runtime error:
invalid memory address or nil pointer dereference:
goroutine 1974019 [running]:
panic({0x3337640, 0x5a0e880})
/usr/local/go/src/runtime/panic.go:838 +0x207
github.com/cloudwego/netpoll.(*LinkBuffer).WriteBuffer(0xc0016fc1e0?, 0xc026839e28?)
/builds/bdm/bds/quote/.mod_cache/github.com/cloudwego/netpoll@v0.3.2/nocopy_linkbuffer.go:407 +0x33
github.com/cloudwego/netpoll.(*LinkBuffer).Append(0xc026839e18?, {0x3cbfb88?, 0xc03efb9d10?})
/builds/bdm/bds/quote/.mod_cache/github.com/cloudwego/netpoll@v0.3.2/nocopy_linkbuffer.go:393 +0x32
github.com/cloudwego/netpoll.(*connection).Append(0x16c0175?, {0x3cbfb88?, 0xc03efb9d10?})
/builds/bdm/bds/quote/.mod_cache/github.com/cloudwego/netpoll@v0.3.2/connection_impl.go:236 +0x2a
github.com/cloudwego/netpoll/mux.(*ShardQueue).deal(0xc03ee932c0, {0xc040e57600, 0x1, 0xc00019c000?})
/builds/bdm/bds/quote/.mod_cache/github.com/cloudwego/netpoll@v0.3.2/mux/shard_queue.go:180 +0x92
github.com/cloudwego/netpoll/mux.(*ShardQueue).foreach.func1()
/builds/bdm/bds/quote/.mod_cache/github.com/cloudwego/netpoll@v0.3.2/mux/shard_queue.go:154 +0x152
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1.1(0x16c0112?, 0x334fa60?)
/builds/bdm/bds/quote/.mod_cache/github.com/bytedance/gopkg@v0.0.0-20220817015305-b879a72dc90f/util/gopool/worker.go:69 +0x66
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1()
/builds/bdm/bds/quote/.mod_cache/github.com/bytedance/gopkg@v0.0.0-20220817015305-b879a72dc90f/util/gopool/worker.go:70 +0xe5
created by github.com/bytedance/gopkg/util/gopool.(*worker).run
/builds/bdm/bds/quote/.mod_cache/github.com/bytedance/gopkg@v0.0.0-20220817015305-b879a72dc90f/util/gopool/worker.go:41 +0x56
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