Issues

TS2536 indexing an `as`-remapped mapped type by `Exclude<keyof T & string, ...>` (native 7.0.2 only)

microsoft/TypeScript#64768 · opened

on Oct 13, 2026

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

microsoft/TypeScript#64766 · opened

on Oct 13, 2026

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

microsoft/TypeScript#64763 · opened

on Oct 13, 2026

1

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

microsoft/TypeScript#64760 · opened

on Oct 13, 2026

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

microsoft/TypeScript#64758 · 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 · opened

on Oct 12, 2026

[api] createSnapshot never returns when the opened tsconfig.json has a circular extends

microsoft/TypeScript#64754 · opened

on Oct 12, 2026

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

microsoft/TypeScript#64742 · opened

on Oct 12, 2026

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

microsoft/TypeScript#64740 · 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 · opened

on Oct 11, 2026

2

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

microsoft/TypeScript#64769 · opened

on Oct 10, 2026

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

microsoft/TypeScript#64727 · 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 · opened

on Oct 10, 2026

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

microsoft/TypeScript#64721 · opened

on Oct 10, 2026

Declaration diagnostics allocate a diagnostic selector closure for every declaration visited

microsoft/TypeScript#64720 · opened

on Oct 10, 2026

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

microsoft/TypeScript#64719 · 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 · opened

on Oct 10, 2026

[ServerErrors][TypeScript] main

microsoft/TypeScript#64714 · opened

on Oct 10, 2026

3

[ServerErrors][JavaScript] main

microsoft/TypeScript#64710 · opened

on Oct 9, 2026

3

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

microsoft/TypeScript#64709 · 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 · opened

on Oct 9, 2026

JSDoc-generated namespaces not merged with default exports

microsoft/TypeScript#64707 · opened

on Oct 9, 2026

Declaration emit renames value references when a shadowed type parameter shares its parameter's name

microsoft/TypeScript#64706 · opened

on Oct 9, 2026

1

False negative issues in function type parameters of ts2824

microsoft/TypeScript#64705 · opened

on Oct 9, 2026

[7.0 regression] hover on calls through object properties loses function JSDoc while signature help works

microsoft/TypeScript#64702 · opened

on Oct 9, 2026

Navigation Menu

Repository navigation

Issues

TS2536 indexing an `as`-remapped mapped type by `Exclude<keyof T & string, ...>` (native 7.0.2 only)

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

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

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

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

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

[api] createSnapshot never returns when the opened tsconfig.json has a circular extends

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

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

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

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

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

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

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

Declaration diagnostics allocate a diagnostic selector closure for every declaration visited

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

`--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)

[ServerErrors][TypeScript] main

[ServerErrors][JavaScript] main

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

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

JSDoc-generated namespaces not merged with default exports

Declaration emit renames value references when a shadowed type parameter shares its parameter's name

False negative issues in function type parameters of ts2824

[7.0 regression] hover on calls through object properties loses function JSDoc while signature help works