Bun is crashing with Many Worker Threads

[MNK144]

How can we reproduce the crash?

I am just trying to do some benchmarking of BunJS along with Express. So the code is looping through and performing some arithmatic and logical expressions nothing much.

Issue started occuring when i was doing performance testing on Worker Thread based code by Ramping up concurrent connections from 5 to 100, it is crashing with provided error at around 150-200 requests (15-20 concurrent requests). I have also tried running it with fixed 50 concurrent requests and it crashed again. I have provided error logs for both

Relevant log output

============================================================
Bun v1.1.42 (50eec002) Windows x64
Windows v.win10_fe
CPU: sse42 avx avx2
Args: "C:\Users\Manank\.bun\bin\bun.exe" "run" "server.js"
Features: http_server jsc tsconfig(15) workers_spawned(157) workers_terminated(156)
Builtins: "bun:main" "node:async_hooks" "node:buffer" "node:crypto" "node:events" "node:fs" "node:http" "node:net" "node:path" "node:querystring" "node:stream" "node:string_decoder" "node:tty" "node:url" "node:util" "node:util/types" "node:zlib" "node:worker_threads"
Elapsed: 31108ms | User: 8703ms | Sys: 2468ms
RSS: 0.25GB | Peak: 0.35GB | Commit: 0.40GB | Faults: 1213611

panic(thread 30552): Segmentation fault at address 0x5432C1804E8
oh no: Bun has crashed. This indicates a bug in Bun, not your code.



============================================================
Bun v1.1.42 (50eec002) Windows x64
Windows v.win10_fe
CPU: sse42 avx avx2
Args: "C:\Users\Manank\.bun\bin\bun.exe" "run" "server.js"
Features: http_server jsc tsconfig(15) workers_spawned(817) workers_terminated(814)
Builtins: "bun:main" "node:async_hooks" "node:buffer" "node:crypto" "node:events" "node:fs" "node:http" "node:net" "node:path" "node:querystring" "node:stream" "node:string_decoder" "node:tty" "node:url" "node:util" "node:util/types" "node:zlib" "node:worker_threads"
Elapsed: 93692ms | User: 49171ms | Sys: 16171ms
RSS: 0.41GB | Peak: 0.55GB | Commit: 0.99GB | Faults: 6085794

panic(thread 46216): Segmentation fault at address 0x36AB3B50400
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

Stack Trace (bun.report)

Bun v1.1.42 (50eec00) on windows x86_64 [RunCommand]

Segmentation fault at address 0x39F4C1B0728

• core.c:109: uv__loops_add
• core.c:299: uv_loop_init
• libuv.zig:2805: errEnum
• event_loop.zig:1606: ensureWaker
• javascript.zig:3083: reloadEntryPoint
• javascript.zig:3132: loadEntryPointForWebWorker
• bindings.cpp:5068: JSC__VM__holdAPILock
• shimmer.zig:201: cppFn

Features: workers_spawned, workers_terminated, http_server, jsc, tsconfig, tsconfig

_{Sentry Issue: BUN-4GW}

[Jarred-Sumner]

Tracking this in #15964