Issues

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

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

typescript-go: Infinite recursion in inferFromTypes via getReturnTypeOfSignature (tsc 5.9 OK)

microsoft/TypeScript#64701 · opened

on Oct 9, 2026

LSP middleware cannot handle `textDocument/prepareRename` errors, which blocks rename in embedded templates

microsoft/TypeScript#64700 · opened

on Oct 9, 2026

[7.0 regression] Object literal passed to a method on a large union creates exponentially many types (type order dependent)

microsoft/TypeScript#64692 · opened

on Oct 8, 2026

TS2322: `const` type parameter infers `readonly []`, rejected through a union return type (7.1.0-dev regression from typescript-go#4591)

microsoft/TypeScript#64690 · opened

on Oct 8, 2026

TS 7 language server: "Add missing properties" quick fix not offered

microsoft/TypeScript#64689 · opened

on Oct 8, 2026

Type printer recurses without limit into nested array/tuple types (stack overflow; can leave later types `any`)

microsoft/TypeScript#64683 · opened

on Oct 8, 2026

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Issues

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)

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

typescript-go: Infinite recursion in inferFromTypes via getReturnTypeOfSignature (tsc 5.9 OK)

LSP middleware cannot handle `textDocument/prepareRename` errors, which blocks rename in embedded templates

[7.0 regression] Object literal passed to a method on a large union creates exponentially many types (type order dependent)

TS2322: `const` type parameter infers `readonly []`, rejected through a union return type (7.1.0-dev regression from typescript-go#4591)

TS 7 language server: "Add missing properties" quick fix not offered

Type printer recurses without limit into nested array/tuple types (stack overflow; can leave later types `any`)