MozartBreathCore.dll causes Bun to crash

[toutzhang]

How can we reproduce the crash?

Nope.

Relevant log output

2025-11-04 21:18:56.165 [info] From claude: ============================================================
Bun v1.3.1 (89fa0f34) Windows x64 (baseline)
Windows v.win10_cu
CPU: sse42 avx avx2 avx512
Args: "d:\VSCode\data\extensions\anthropic.claude-code-2.0.31-win32-x64\resources\native-binary\claude.exe" "--output-format" "stream-json" "--verbose" "--input-format" "stream-json" "--append-system-prompt
2025-11-04 21:18:56.165 [info] From claude: " "\n# VSCode Exten"...
Features: Bun.stderr(2) Bun.stdin(2) Bun.stdout(2) jsc spawn standalone_executable 
Builtins: "bun:main" "node:assert" "node:async_hooks" "node:buffer" "node:child_process" "node:constants" "node:crypto" "node:domain" "node:events" "node:fs" "node:fs/promises" "node:http" "node:https" "node:module" "node:net" "node:os" "node:path" "node:path/win32" "node:perf_hooks" "node:process" "node:querystring" "node:stream" "node:string_decoder" "node:timers/promises" "node:tls" "node:tty" "node:url" "node:util" "node:zlib" "node:worker_threads" "undici" "ws" "node-fetch" "node:inspector" "node:http2" 

2025-11-04 21:18:56.166 [info] From claude: Elapsed: 1918ms | User: 3500ms | Sys: 312ms
RSS: 0.37GB | Peak: 0.37GB | Commit: 0.32GB | Faults: 95550 | Machine: 30.06GB

panic(thread 27400): Segmentation fault at address 0x7FF6BC8F3000
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

Stack Trace (bun.report)

Bun v1.3.1 (89fa0f3) on windows x86_64_baseline [_]

Segmentation fault at address 0x7FF6251D3000

• ??? at 0x15e11 in KERNEL32.DLL
• ??? at 0x14c35a in MozartBreathCore.dll
• ??? at 0x151b5c in MozartBreathCore.dll
• ??? at 0x152fb9 in MozartBreathCore.dll
• ??? at 0x1501fd in MozartBreathCore.dll
• ??? at 0x20a3c in MozartBreathBolo2.dll
• ??? at 0x27a05 in MozartBreathBolo2.dll
• ??? at 0x1ef6f in Vozokopot.dll
• ??? at 0x1f8fe in Vozokopot.dll
• ??? at 0x1f939 in Vozokopot.dll
• ??? at 0x17374 in KERNEL32.DLL
• ??? at 0x4cc91 in ntdll.dll

Features: Bun.stderr, Bun.stdin, Bun.stdout, jsc, spawn, standalone_executable, standalone_executable

_{Sentry Issue: BUN-YT9}

[nektro]

looks like AV according to https://issues.chromium.org/issues/40911708