Intermittent CI failure: pure virtual method called

[ascjones]

Intermittently, all tests pass but the CI job fails with pure virtual method called.

Could be related: https://github.com/openethereum/openethereum/issues/6762, facebook/rocksdb#649.

Perhaps because of the test node, which probably uses rocksdb.

[gregdhill]

Any update on this? We're using the test runner in polkabtc-clients and we encounter this failure quite consistently.

[ascjones]

No I haven't had the chance to look at it yet, it is extremely annoying though.

[sander2]

Fwiw, in polkabtc-clients, using ParityDb instead of RocksDb in the tests seems to work around this issue

[ascjones]

Integration tests on our CI now use a spawned node rather than the embedded test-node. See #252. I'll close this for now, even though it using the test-node on CI will still produce this error.