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  "state": "closed",
  "title": "Fix crash with protected constructor and generic intermediate class",
  "number": 1296,
  "source": "aidev",
  "commits": 3,
  "debrief": "Copilot was asked to fix a TypeScript compiler crash, a nil pointer dereference when checking protected constructor access through generic intermediate classes, in microsoft/typescript-go. The change touched seven files with 109 additions across three commits. Human review closed it unmerged. The reviewer noted that returning nil for non-interface types is the correct behavior.",
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  "opened_at": "2025-06-26T16:14:47+00:00",
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  "confidence": "dataset",
  "updated_at": "2026-11-03T21:51:59.436758+00:00",
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  "body_excerpt": "The TypeScript compiler was crashing with a nil pointer dereference when checking protected constructor accessibility through generic intermediate classes. Consider:\n\n```typescript\nclass C {\n  protected constructor() {}\n}\n\nclass B<T = any> extends C {}\n\nclass A extends B {\n  f() {\n    new A(); // Th",
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  "reviewer_excerpt": "> **Fix:** Added a nil check after `AsInterfaceType()` and return `nil` (no base types) for non-interface types, which is the correct behavior. The compiler now",
  "review_comment_count": 0,
  "reviewer_excerpt_url": "https://github.com/microsoft/typescript-go/pull/1296#issuecomment-3010350034"
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 "repo": {
  "name": "typescript-go",
  "owner": "microsoft",
  "stars": 26089,
  "license": "Apache-2.0",
  "full_name": "microsoft/typescript-go",
  "primary_language": "Go"
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   "agent": "github-copilot",
   "state": "merged",
   "title": "Add guidance to use @strict: true by default in new compiler tests",
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   "state": "merged",
   "title": "Fix parameter-property with default value emitting `T | undefined` instead of `T`",
   "number": 1479,
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   "merged_at": "2025-07-30T15:12:45+00:00",
   "opened_at": "2025-07-30T12:02:53+00:00",
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  },
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   "agent": "github-copilot",
   "state": "merged",
   "title": "Fix comment formatting bug that mangled `*/` tokens",
   "number": 1401,
   "outcome": "merged_clean",
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   "additions": 202,
   "deletions": 131,
   "merged_at": "2025-07-22T16:46:34+00:00",
   "opened_at": "2025-07-14T03:03:29+00:00",
   "task_type": "fix",
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   "hours_to_merge": 205.72
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 "pr_url": "https://github.com/microsoft/typescript-go/pull/1296",
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