bun Segmentation fault at address 0x0 oh no: Bun has crashed. This indicates a bug in Bun, not your code.

[previraza]

How can we reproduce the crash?

bun --bun dev -p 8081

Relevant log output

$ next dev --turbopack -p "8081"
   ▲ Next.js 15.0.3 (Turbopack)
   - Local:        http://localhost:8081
   - Environments: .env

 ✓ Starting...
 ✓ Compiled in 368ms
 ✓ Ready in 1540ms
============================================================
Bun v1.1.38 (bf2f153f) Linux x64
Linux Kernel v6.8.0 | glibc v2.39
CPU: sse42 popcnt avx avx2
Args: "/home/mci/.bun/bin/bun" "/home/mci/xTest/snen/node_modules/next/dist/server/lib/start-server.js"
Features: Bun.stdin dotenv fetch(2) http_server jsc spawn transpiler_cache(21) tsconfig tsconfig_paths process_dlopen 
Builtins: "bun:jsc" "bun:main" "node:assert" "node:async_hooks" "node:buffer" "node:child_process" "node:constants" "node:crypto" "node:dns/promises" "node:events" "node:fs" "node:fs/promises" "node:http" "node:https" "node:module" "node:net" "node:os" "node:path" "node:perf_hooks" "node:process" "node:querystring" "node:stream" "node:stream/web" "node:string_decoder" "node:tty" "node:url" "node:util" "node:util/types" "node:vm" "node:zlib" "node:worker_threads" "ws" "node:v8" "node:diagnostics_channel" 
Elapsed: 3773ms | User: 2593ms | Sys: 259ms
RSS: 1.07GB | Peak: 0.33GB | Commit: 1.07GB | Faults: 0

panic(main thread): Segmentation fault at address 0x0
oh no: Bun has crashed. This indicates a bug in Bun, not your code.

To send a redacted crash report to Bun's team,
please file a GitHub issue using the link below:

 https://bun.report/1.1.38/la1bf2f153gB9v76/duw1/kE+xpRk/l3iE8thxmD09qpjE_8mgh7D8mgh7D8mgh7D_A2AA

Stack Trace (bun.report)

Bun v1.1.38 (bf2f153) on linux x86_64 [AutoCommand]

Segmentation fault at address 0x00000000

• WebSocket.h:133: uWS::WebSocket<false, true, void*>::send
• uws.zig:0: ServerWebSocketPrototype__send
• ZigGeneratedClasses.cpp:36670: WebCore::ServerWebSocketPrototype__sendCallback
• 1 unknown/js code
• ld-temp.o:0: llint_op_call
• ld-temp.o:0: llint_op_call
• ld-temp.o:0: llint_op_call

Features: process_dlopen, Bun.stdin, dotenv, fetch, http_server, jsc, spawn, transpiler_cache, tsconfig, tsconfig_paths, tsconfig_paths

[github-actions]

Thank you for reporting this crash.

For Bun's internal tracking, this issue is BUN-9K9.

[Jarred-Sumner]

Please let us know if you still run into this again on Bun v1.1.42+