{
  "id": 8048484,
  "title": "What std::mem::forget Actually Does to Heap Allocations",
  "url": "https://urgent.news/2026/09/17/what-std-mem-forget-actually-does-to-heap-allocations",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-17T15:37:00.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/sufyanism/what-stdmemforget-actually-does-to-heap-allocations-38a3"
  },
  "original_language": "en",
  "account": "Rust enforces memory safety but does not ensure resource freedom. Calling std::mem::forget disables destructor execution completely, which frees the stack pointer while keeping heap metadata active in allocator slabs. This article explores the intricate differences between std::mem::forget, Box::into_raw, and ManuallyDrop. Understanding how orphaned allocations evade Undefined Behavior while silently fragmenting virtual memory is crucial for maintaining long-running infrastructure stability.",
  "summary": "Rust guarantees memory safety, not resource freedom. Calling std::mem::forget suppresses destructor execution entirely, tearing down the stack pointer while leaving heap metadata active in allocator slabs. This deep dive dissects the machine-level divide between std::mem::forget, Box::into_raw, and ManuallyDrop. Learn how orphaned allocations evade Undefined Behavior while silently fragmenting…",
  "key_points": [
    "std::mem::forget disables destructor execution, freeing stack pointer.",
    "Keeps heap metadata active in allocator slabs, evading Undefined Behavior.",
    "Differentiates from Box::intoraw and ManuallyDrop for resource management."
  ],
  "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."
}