Issues

• Info missing when hover on a proptery compare to TS6

  microsoft/TypeScript#64582 · opened on Oct 1, 2026 · Backlog

• Support spread in recursive object inference

  microsoft/TypeScript#64531 · opened on Sep 29, 2026 · Backlog

• Find all references on from of a default import drops results after an unsaved edit in another file

  microsoft/TypeScript#64497 · opened on Sep 28, 2026 · Backlog
  1

• Record<K1, T> & Record<K2, U> is assignable to Record<K1 | K2, T & U>

  microsoft/TypeScript#64495 · opened on Sep 28, 2026 · Backlog

• TS2589 error in TSGo with recursive mapped type over DOM types but not is tsc; ~18x more instantiations than tsc

  microsoft/TypeScript#64486 · opened on Sep 27, 2026 · Backlog

• [LSP] Memory of configured projects is never released, even after didClose of all files — ~70 MB retained per project (7.0.2 and 7.1.0-dev.20260926.1)

  microsoft/TypeScript#64463 · opened on Sep 26, 2026 · Backlog
  3

• Declarations in declare global can have export modifiers

  microsoft/TypeScript#64430 · opened on Sep 24, 2026 · Backlog
  1

• Recursive schema through a call-wrapped callback property (lazy(() => Self)) still infers any after #64311

  microsoft/TypeScript#64420 · opened on Sep 24, 2026 · Backlog
  1

• --incremental retains stale diagnostics when augmenting a re-exported interface

  microsoft/TypeScript#64386 · opened on Sep 22, 2026 · Backlog

• Panic in TupleNormalizer.normalize (nil currentNode) when declaration emit resolves an oversized tuple type under --noCheck

  microsoft/TypeScript#64384 · opened on Sep 22, 2026 · Backlog

• enhance: Add tests for premature caching of contextual parameter types

  microsoft/TypeScript#64278 · opened on Sep 15, 2026 · Backlog
  1

• Object with all context-sensitive properties requires at least one non-context-sensitive property for inference to work

  microsoft/TypeScript#64251 · opened on Sep 12, 2026 · Backlog
  4

• The options arg of Temporal.ZonedDateTime.prototype.toLocaleString() currently accepts "illegal" option timeZone

  microsoft/TypeScript#64227 · opened on Sep 10, 2026 · Backlog
  1

• Perhaps there is an incorrect test directive in useStrictLikePrologueString01

  microsoft/TypeScript#64198 · opened on Sep 8, 2026 · Backlog
  1

• Narrowing of generic this is inconsistent with variable narrowing

  microsoft/TypeScript#64186 · opened on Sep 7, 2026 · Backlog

• [Auto-import] Quick Fix suggests invalid module specifiers that fail to resolve at runtime

  microsoft/TypeScript#64171 · opened on Sep 4, 2026 · Backlog

• sourceMap emit is disproportionately slow for files containing one very large object literal

  microsoft/TypeScript#64134 · opened on Sep 2, 2026 · Backlog

• tsconfig include silently drops Foo.tsx when foo.ts exists, on a case-insensitive filesystem

  microsoft/TypeScript#64098 · opened on Aug 30, 2026 · Backlog
  2

• On TypeScript 7, Call hierarchy shows a full absolute path instead of file name + relative path

  microsoft/TypeScript#64097 · opened on Aug 30, 2026 · Backlog
  1

• TS7: @extends is ignored when the heritage is a call expression (Base.extend())

  microsoft/TypeScript#64058 · opened on Aug 27, 2026 · Backlog

• Generic recursive function infers incorrect return type

  microsoft/TypeScript#63990 · opened on Aug 24, 2026 · Backlog
  1

• compilerOptions.plugins is not inherited through tsconfig "extends"

  microsoft/TypeScript#63975 · opened on Aug 24, 2026 · Backlog
  2

• The new --lsp flag is not mentioned in tsc --help's output

  microsoft/TypeScript#63959 · opened on Aug 22, 2026 · Backlog
  5

• Declaration emit: JSDoc @typedef/@callback comments are separated from their synthesized type when preceded by another declaration

  microsoft/TypeScript#63958 · opened on Aug 22, 2026 · Backlog
  4

• [7.0 regression] Type parameter default is ignored when the call sits inside a callback passed to a generic function

  microsoft/TypeScript#63949 · opened on Aug 21, 2026 · Backlog
  1