Issues

• Crash: Unhandled case in resolveStructuredTypeMembers when switching on an evolving [] array inside a loop

  microsoft/TypeScript#64813 · Filter by author YuanchengJiang opened on Oct 14, 2026

• Declaration emit cannot name an exported unique symbol property key unless the file already imports it

  microsoft/TypeScript#64812 · Filter by author sindresorhus opened on Oct 14, 2026

• Native LSP watcher shutdown races subscription publication and panics on a nil map

  microsoft/TypeScript#64810 · Filter by author vizanto opened on Oct 14, 2026

• TS 7: backport typescript-go#4665 to a 7.0.x patch release; the same bug also drops declaration emit

  microsoft/TypeScript#64809 · Filter by author Nabil372 opened on Oct 14, 2026

• --stableTypeOrdering: unknown || {} is assignable to Record<string, T> in 6.0.3 with the option, and not in 7.0.2 nor in 6.0.3 without it

  microsoft/TypeScript#64807 · Filter by author MARCROCK22 opened on Oct 13, 2026
  1

• === narrowing of a primitive union now produces a non-widening literal type (regression from microsoft/typescript-go#4781)

  Bug
  microsoft/TypeScript#64766 · Filter by author sophiebits opened on Oct 13, 2026 · TypeScript 7.1.1 RC

• Parser: exponential time and memory on nested a < (b = …) (failed type argument speculation is retried)

  microsoft/TypeScript#64763 · Filter by author moznion opened on Oct 13, 2026
  1

• Declaration emit writes = Infinity initializers for overflowing number literals (invalid .d.ts, TS1254)

  microsoft/TypeScript#64760 · Filter by author sidcraftscode opened on Oct 13, 2026

• TS7 LSP: documentHighlight returns nothing when the file path contains '@'

  microsoft/TypeScript#64758 · Filter by author snapwich opened on Oct 13, 2026

• Regression in 7.1 (#64553): R inferred as unknown through a generic type alias call signature with a nested same-type argument

  microsoft/TypeScript#64757 · Filter by author kennysarnoski-jarvis opened on Oct 12, 2026

• Language server (tsc --lsp) exits with code 1 after shutdown and exit

  microsoft/TypeScript#64742 · Filter by author creasty opened on Oct 12, 2026

• [API] ConditionalType has no counterpart to root of TypeScript 6 (the node it was declared with)

  microsoft/TypeScript#64740 · Filter by author MARCROCK22 opened on Oct 12, 2026

• TS 7.0 reports declaration-emit diagnostics (e.g. TS2527) under --noEmit when other semantic errors exist; TS 6.0 does not (undocumented difference)

  microsoft/TypeScript#64730 · Filter by author seunghyun-24 opened on Oct 11, 2026
  2

• Refactor > ... does nothing / fails silently for .tsx components that consume css module style(s)

  microsoft/TypeScript#64769 · Filter by author IanBellomy opened on Oct 10, 2026

• TS 7: declaration emit property order depends on which other files are in the program

  microsoft/TypeScript#64727 · Filter by author maschwenk opened on Oct 10, 2026
  3

• Crash (nil pointer in getPropertyOfObjectType) under --noLib when a global import x = T.m names a type

  microsoft/TypeScript#64725 · Filter by author YuanchengJiang opened on Oct 10, 2026

• Module specifier generation rescans package.json exports and tsconfig paths for every importing file

  microsoft/TypeScript#64721 · Filter by author gwkline opened on Oct 10, 2026

• Declaration diagnostics allocate a diagnostic selector closure for every declaration visited

  microsoft/TypeScript#64720 · Filter by author gwkline opened on Oct 10, 2026

• export * resolution allocates per re-exported name, slowing checks of barrels over large modules

  microsoft/TypeScript#64719 · Filter by author gwkline opened on Oct 10, 2026

• --incremental keeps stale diagnostics after a change in a declare global block of a package declaration file (7.0.2, regression from 6.0.3)

  microsoft/TypeScript#64715 · Filter by author plum117 opened on Oct 10, 2026

• [ServerErrors][TypeScript] main

  microsoft/TypeScript#64714 · Filter by author typescript-automation opened on Oct 10, 2026
  3

  

• [ServerErrors][JavaScript] main

  microsoft/TypeScript#64710 · Filter by author typescript-automation opened on Oct 9, 2026
  3

  

• API status as of 7.1 beta, versioning/compatibility plan ahead

  DiscussionDomain: API
  microsoft/TypeScript#64709 · Filter by author andrewbranch opened on Oct 9, 2026
  

• Unbounded memory in declaration emit for an inferred type built from non-exported recursive aliases (also hit by --noEmit --watch)

  microsoft/TypeScript#64708 · Filter by author mattleonowicz opened on Oct 9, 2026

• JSDoc-generated namespaces not merged with default exports

  microsoft/TypeScript#64707 · Filter by author donmccurdy opened on Oct 9, 2026