Segmentation fault on running a test

[s-h-a-d-o-w]

How can we reproduce the crash?

git clone git@github.com:grafana/grafana.git
yarn install --immutable
bun test public/app/features/manage-dashboards/state/actions.test.ts

Relevant log output

bun test v1.1.12 (43f0913c)

public/app/features/manage-dashboards/state/actions.test.ts:
============================================================
Bun v1.1.12 (43f0913c) Linux x64
Args: "bun" "test" "public/app/features/manage-dashboards/state/actions.test.ts"
Features: jsc transpiler_cache(15) tsconfig_paths(2) tsconfig(12) 
Builtins: "node:util" "node:util/types" 
Elapsed: 441ms | User: 348ms | Sys: 113ms
RSS: 0.80GB | Peak: 0.27GB | Commit: 0.80GB | Faults: 0

panic(main thread): Segmentation fault at address 0x1A
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

Stack Trace (bun.report)

Bun v1.1.12 (43f0913) on linux x86_64 [AutoCommand]

Segmentation fault at address 0x0000001A

• ld-temp.o:0: WTF::Unicode::convertReplacingInvalidSequences
• ??
• 1 unknown/js code
• ld-temp.o:0: llint_relativePCBase
• ld-temp.o:0: JSC::Interpreter::executeCall
• ld-temp.o:0: JSC::JSModuleEnvironment::getOwnPropertySlot
• ld-temp.o:0: JSC::VM::drainMicrotasks
• StringImpl.h:262: Bun::ProcessBindingUV::jsErrname
• Timer.zig:390: src.bun.js.api.Timer.TimerObject.runImmediateTask
• tagged_pointer.zig:40: src.bun.js.event_loop.EventLoop.tickQueueWithCount__anon_363385

[Jarred-Sumner]

The underlying cause is a TSX transpiler issue in Bun with the following line:

 export const A = <T = unknown,>({}: B<T>) => {};

And then a yet-to-be-understood bug with error handling happens sometime after that.