{
  "id": 2605735,
  "title": "The Crash That Only Happened in Production",
  "url": "https://urgent.news/2026/08/22/the-crash-that-only-happened-in-production",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-08-22T15:49:13.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/byteio_3726/the-crash-that-only-happened-in-production-j01"
  },
  "original_language": "en",
  "account": "A production-only crash, invisible during local testing, was discovered to be caused by an intermittent data race in code generated by a free coding model. The issue was traced using the Go race detector, which made the invisible bug visible. The reporter used MonkeyCode's free model access to create a concurrent log aggregator for a side project and previewed it on the free server option. The bug arose due to concurrent map writes without synchronization, leading to the fatal error: concurrent map writes. The fix involved wrapping the map in a mutex to ensure safe access. The reporter emphasized the importance of treating every agent-written map as a suspect until proven otherwise, especially when experimenting with free model access and free servers. Enabling the race detector during testing can help catch class of bugs that only appear under load, providing valuable insights without significantly impacting the test suite's performance.",
  "summary": "The crash was intermittent, production-only, and invisible to every test I ran locally. It turned out to be a data race in code a free coding model wrote for me, and the fix was a single lock. This post walks the symptom-to-root-cause trail and shows how the Go race detector made the invisible visible. I used MonkeyCode's free model access to generate a small concurrent log aggregator for a side…",
  "key_points": [
    "Crash discovered only in production, not during local testing",
    "Intermittent data race in code generated by free coding model",
    "Fix involved adding mutex to ensure safe map access"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}