Using worker threads causes some native modules to crash

[asztal]

Is there a way to disable the node v12 behaviour where mocha-parallel-tests uses worker threads?

As great as it sounds, it's causing an issue with some native modules which are not context-aware and crash when loaded in a worker thread, for example node-sass: https://github.com/sass/node-sass/issues/2746

If I were to contribute such an option, how would you want it to be done (--some-option, environment variable, something else)?

[1999]

Interesting. My preference would be having an environment variable because it's more like an emergency measure rather than an intended behaviour change based on the flag. Happy to review the PR.

[slava-t]

Created a pull request for this issue

[silasdavis]

I am wondering if I might be hitting something similar with the grpc native modules:

FATAL ERROR: HandleScope::HandleScope Entering the V8 API without proper locking in place
 1: 0x9dab80 node::Abort() [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
 2: 0x9dbd36 node::OnFatalError(char const*, char const*) [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
 3: 0xb3b22a v8::Utils::ReportApiFailure(char const*, char const*) [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
 4: 0xb3c7ae v8::HandleScope::HandleScope(v8::Isolate*) [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
 5: 0x94a98e node::InternalCallbackScope::InternalCallbackScope(node::Environment*, v8::Local<v8::Object>, node::async_context const&, node::InternalCallbackScope::ResourceExpectation) [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
 6: 0x94b8a5 node::MakeCallback(v8::Isolate*, v8::Local<v8::Object>, v8::Local<v8::Function>, int, v8::Local<v8::Value>*, node::async_context) [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
 7: 0x7fc130c89abc  [/home/silas/code/platform/node_modules/grpc/src/node/extension_binary/node-v72-linux-x64-glibc/grpc_node.node]
 8: 0x7fc130c94193  [/home/silas/code/platform/node_modules/grpc/src/node/extension_binary/node-v72-linux-x64-glibc/grpc_node.node]
 9: 0x12df7ec  [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
10: 0x12d856c uv_run [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
11: 0xa1d120 node::NodeMainInstance::Run() [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
12: 0x9acb78 node::Start(int, char**) [/home/silas/.nvm/versions/node/v12.15.0/bin/node]
13: 0x7fc139b0a023 __libc_start_main [/usr/lib/libc.so.6]
14: 0x94a115  [/home/silas/.nvm/versions/node/v12.15.0/bin/node]