Verify mixhash will freeze the node in Ropsten testnet

[WoeOm]

raw:

{ parent_hash: '0xc2d104908203a4419cc29f9e5ceebe5a130d96ac69a865cfef89e36f2b6de5f1', timestamp: 1575624114, number: 6915602, auth: '0x4CCfB3039b78d3938588157564c9AD559bAfAB94', transaction_root: '0x9a97b00869ce8de3cd646be8a1c6148d3edb7f7083ac9bcfb9a9d6cc0d0f0b54', uncles_hash: '0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347', extra_data: '0xd983010906846765746889676f312e31312e3133856c696e7578', state_root: '0x75383e52592a2f3e40234dc6ad4af1383e6fa8115ab2171ad387be9de7e291ca', receipts_root: '0xc5ce3af4decafc93c2823424a1ff470d22e4bb5479d10521a6ef76520aee6da9', log_bloom: '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', gas_used: 3558723, gas_limit: 8000000, difficulty: '10806626916', seal: [ '0xa0909224b492f81573c79e9a3df51425f6793a7499158239f080fc184907588d55', '0x88e6fef2a006f7c836' ], hash: '0xb0b1ad2670694515ef167db041983933fbba51fcd03b600392b8c74480b10e13' }

---

format json:

{
	"parent_hash": "0xc2d104908203a4419cc29f9e5ceebe5a130d96ac69a865cfef89e36f2b6de5f1",
	"timestamp": 1575624114,
	"number": 6915602,
	"auth": "0x4CCfB3039b78d3938588157564c9AD559bAfAB94",
	"transaction_root": "0x9a97b00869ce8de3cd646be8a1c6148d3edb7f7083ac9bcfb9a9d6cc0d0f0b54",
	"uncles_hash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
	"extra_data": "0xd983010906846765746889676f312e31312e3133856c696e7578",
	"state_root": "0x75383e52592a2f3e40234dc6ad4af1383e6fa8115ab2171ad387be9de7e291ca",
	"receipts_root": "0xc5ce3af4decafc93c2823424a1ff470d22e4bb5479d10521a6ef76520aee6da9",
	"log_bloom": "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",
	"gas_used": 3558723,
	"gas_limit": 8000000,
	"difficulty": "10806626916",
	"seal": [
		"0xa0909224b492f81573c79e9a3df51425f6793a7499158239f080fc184907588d55",
		"0x88e6fef2a006f7c836"
	],
	"hash": "0xb0b1ad2670694515ef167db041983933fbba51fcd03b600392b8c74480b10e13"
}

[hackfisher]

Why tests pass?

[aurexav]

Only when the function was finished, the Event would be sent.

We've to debug line by line. Feel so painful 🙃! Any other ideas?

Problem Source:

darwinia/srml/eth-relay/src/lib.rs

Line 243 in 73f519b

let light_dag = DAG::new(number.into());

Btw, number.into() is ok. Don't worry about it.

Maybe the usize get overflow in wasm which was used in DAG.

[aurexav]

Why tests pass?

When I try cargo test, it stuck at relay_header too.

CPU usage 100%, no error. Endless loop in DAG::new(number.into())?

[hackfisher]

Why tests pass?

When I try cargo test, it stuck at relay_header too.

CPU usage 100%, no error. Endless loop in DAG::new(number.into())?

I run cargo test --release, different in debug model?

[hackfisher]

Failed to build ethash on target wasm32-unknown-unknown:

cargo build --release --target=wasm32-unknown-unknown

and wasm build:

error: failed to run custom build command for `node-runtime v0.2.0 (/Users/denny/github.com/darwinia-network/darwinia/node/runtime)`

Caused by:
  process didn't exit successfully: `/Users/denny/github.com/darwinia-network/darwinia/target/release/build/node-runtime-a20e1c08a9cb0fe2/build-script-build` (exit code: 1)
--- stdout
Executing build command: "cargo" "build" "--target=wasm32-unknown-unknown" "--manifest-path=/Users/denny/github.com/darwinia-network/darwinia/target/release/wbuild/node-runtime/Cargo.toml" "--release"

error: literal out of range for `usize`
  --> src/miller_rabin.rs:95:14
   |
95 |             (4_759_123_140, &[2, 7, 61]),
   |              ^^^^^^^^^^^^^
   |
   = note: `#[deny(overflowing_literals)]` on by default

error: literal out of range for `usize`
  --> src/miller_rabin.rs:96:14
   |
96 |             (1_112_004_669_632, &[2, 13, 23, 1662803]),
   |              ^^^^^^^^^^^^^^^^^

error: literal out of range for `usize`
  --> src/miller_rabin.rs:97:14
   |
97 |             (2_152_302_898_746, &[2, 3, 5, 7, 11]),
   |              ^^^^^^^^^^^^^^^^^

error: literal out of range for `usize`
  --> src/miller_rabin.rs:98:14
   |
98 |             (3_474_749_660_382, &[2, 3, 5, 7, 11, 13]),
   |              ^^^^^^^^^^^^^^^^^

error: literal out of range for `usize`
  --> src/miller_rabin.rs:99:14
   |
99 |             (341_550_071_728_320, &[2, 3, 5, 7, 11, 13, 17]),
   |              ^^^^^^^^^^^^^^^^^^^

error: literal out of range for usize
   --> src/miller_rabin.rs:100:14
    |
100 |             (0xFFFF_FFFF_FFFF_FFFF, &[2, 3, 5, 7, 11, 13, 17, 19, 23])
    |              ^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the literal `0xFFFF_FFFF_FFFF_FFFF` (decimal `18446744073709551615`) does not fit into an `usize` and will become `4294967295usize`

error: aborting due to 6 previous errors

error: could not compile `ethash`

[aurexav]

It seems something wrong with Ropsten testnet.

I'll follow up this issue.