Issues

• Object.assign does not understand union types

  Question
  microsoft/TypeScript#64677 · Filter by author prettydiff opened on Oct 7, 2026
  1

• TS2719 "Two different types with this name exist" between identical generic signatures with a distributive conditional parameter type (regression from #64237)

  Needs Investigation
  microsoft/TypeScript#64673 · Filter by author trevorade opened on Oct 7, 2026 · TypeScript 7.1.1 RC
  

• runtime error: invalid memory address or nil pointer dereference in getMembersOfSymbol

  Bug
  microsoft/TypeScript#64669 · Filter by author YuanchengJiang opened on Oct 7, 2026 · Backlog

• panic: Unhandled case in Node.MemberList

  Bug
  microsoft/TypeScript#64668 · Filter by author YuanchengJiang opened on Oct 7, 2026 · Backlog

• runtime error: invalid memory address or nil pointer dereference

  Bug
  microsoft/TypeScript#64667 · Filter by author YuanchengJiang opened on Oct 7, 2026 · Backlog

• panic: Diagnostic emitted without context

  Bug
  microsoft/TypeScript#64666 · Filter by author YuanchengJiang opened on Oct 7, 2026 · Backlog

• Class names eval and arguments are not reported as invalid strict mode bindings

  Bug
  microsoft/TypeScript#64661 · Filter by author JLHwung opened on Oct 6, 2026 · Backlog

• Declaration emit errors (TS5088) on anonymous cyclic types that 6.0 elided to any

  Needs Investigation
  microsoft/TypeScript#64656 · Filter by author ssalbdivad opened on Oct 6, 2026 · TypeScript 7.1.1 RC
  1

  

• Hover ignores the JSDoc written on an import f = a.f alias

  Bug
  microsoft/TypeScript#64655 · Filter by author patrickkettner opened on Oct 6, 2026 · TypeScript 7.1.1 RC
  

• Windows: module resolution fails for paths containing a con/ directory segment (reserved device name)

  microsoft/TypeScript#64653 · Filter by author itrapashko opened on Oct 6, 2026
  

• [api] Let a program created with createPrograms use content mappers

  Bug
  microsoft/TypeScript#64641 · Filter by author cplieger opened on Oct 5, 2026
  

• API server reports TS2345 for a call that tsc accepts on the same project

  Needs Investigation
  microsoft/TypeScript#64635 · Filter by author vivere-dally opened on Oct 5, 2026 · TypeScript 7.1.1 RC
  

• [api] Add parseConfigFileTextToJson() helper

  Needs Investigation
  microsoft/TypeScript#64634 · Filter by author mrazauskas opened on Oct 5, 2026
  

• [api] A nested request from a resolveModuleName callback gets another request's answer

  Bug
  microsoft/TypeScript#64631 · Filter by author cplieger opened on Oct 5, 2026
  

• JSDoc @private / @protected are dropped in declaration emit for properties declared by constructor assignment

  Bug
  microsoft/TypeScript#64628 · Filter by author tlouisse opened on Oct 4, 2026 · TypeScript 7.1.1 RC
  2

  

• [ServerErrors][TypeScript] main vs

  Bug
  microsoft/TypeScript#64623 · Filter by author typescript-automation opened on Oct 3, 2026 · TypeScript 7.1.1 RC
  3

  

• [ServerErrors][JavaScript] main vs

  Bug
  microsoft/TypeScript#64622 · Filter by author typescript-automation opened on Oct 3, 2026 · TypeScript 7.1.1 RC
  4

  

• Non-enum CLI options with multiple values separated by comma and space aren't whitespace trimmed

  Bug
  microsoft/TypeScript#64618 · Filter by author auvred opened on Oct 3, 2026 · TypeScript 7.1.1 RC
  

• TS 7 declaration emit writes unbound type parameters (TOutputOut, $Output) into .d.ts where 6.0 emits any

  Bug
  microsoft/TypeScript#64614 · Filter by author nextor2k opened on Oct 3, 2026 · TypeScript 7.1.1 RC
  1

  

• In-memory virtual file overlay over LSP without faking didOpen

  Suggestion
  microsoft/TypeScript#64611 · Filter by author atscott opened on Oct 2, 2026
  9

• Associate companion files with ProjectService without Content Mappers

  Suggestion
  microsoft/TypeScript#64610 · Filter by author atscott opened on Oct 2, 2026

• TS5115 in published Zod 4.5–4.6 types after #64372

  Needs Investigation
  microsoft/TypeScript#64605 · Filter by author colinhacks opened on Oct 2, 2026 · TypeScript 7.1.1 RC
  

• Support deferred re-exports

  Waiting for TC39
  microsoft/TypeScript#64602 · Filter by author a-tarasyuk opened on Oct 2, 2026

• npm package has "engines": ">=16.2.0" but npx tsc fails on node <20

  microsoft/TypeScript#64596 · Filter by author sandersn opened on Oct 2, 2026
  

• Reverse-mapped inference exposes private members as public; since #63932 this rejects f<T>() as C

  Needs Investigation
  microsoft/TypeScript#64593 · Filter by author kirkouimet opened on Oct 2, 2026 · TypeScript 7.1.1 RC