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<code>Record&lt;string, T&gt; satisfies Record&lt;"literal", T&gt;</code>

Status: Open.

#63034 In microsoft/TypeScript;

· paperclover opened on Jan 22, 2026

Autocomplete incorrectly suggests transitive files from monorepo package

Status: Open.

#63033 In microsoft/TypeScript;

· ericnorris opened on Jan 22, 2026

Narrowing readonly class instance using <code>instanceof</code> results in mutability

Status: Open.

#63032 In microsoft/TypeScript;

· jsejcksn opened on Jan 22, 2026

Top-level variable type narrowing not matched within a function

Working as IntendedThe behavior described is the intended behavior; this is not a bugThe behavior described is the intended behavior; this is not a bug

Status: Open.

#63029 In microsoft/TypeScript;

· themaxgross opened on Jan 21, 2026

(ES2024) The resolving function in Promise.withResolvers() is not allowed to be passed no arguments (void) unless explicitly specified

Not a DefectThis behavior is one of several equally-correct optionsThis behavior is one of several equally-correct options

Status: Open.

#63028 In microsoft/TypeScript;

· rugk opened on Jan 21, 2026

Regression: Generic function returning union of tuples is not assignable to identical type since v4.2

Status: Open.

#63019 In microsoft/TypeScript;

· ikeyan opened on Jan 20, 2026

Regression Crash: RangeError: Maximum call stack size exceeded in isThisInTypeQuery on Nightly

BugA bug in TypeScriptA bug in TypeScript

Domain: CrashesUnhandled exceptions/panics with no immediate primary root cause identifiedUnhandled exceptions/panics with no immediate primary root cause identified

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

Status: Open.

#63015 In microsoft/TypeScript;

· na7ure-a opened on Jan 20, 2026

·  

TypeScript 6.0.0

"Conditionally optional" type works for concrete parameter but not generic

DuplicateAn existing issue was already createdAn existing issue was already created

Status: Open.

#63007 In microsoft/TypeScript;

· ianroberts opened on Jan 17, 2026

Crash： when inferring from a tuple with middle rest elements and trailing variadic elements

BugA bug in TypeScriptA bug in TypeScript

Domain: CrashesUnhandled exceptions/panics with no immediate primary root cause identifiedUnhandled exceptions/panics with no immediate primary root cause identified

Help WantedYou can do thisYou can do this

Status: Open.

#63005 In microsoft/TypeScript;

· na7ure-a opened on Jan 17, 2026

·  

Backlog

Explicit <code>never</code> return type in <code>catch</code> block &amp; condition in <code>finally</code> marks the whole <code>finally</code> block as unreachable

BugA bug in TypeScriptA bug in TypeScript

Status: Open.

#63004 In microsoft/TypeScript;

· d-fischer opened on Jan 17, 2026

·  

Backlog

create primitive to prevent one folder from importing from another

SuggestionAn idea for TypeScriptAn idea for TypeScript

Too ComplexAn issue which adding support for may be too complex for the value it addsAn issue which adding support for may be too complex for the value it adds

Status: Open.

#63002 In microsoft/TypeScript;

· ORESoftware opened on Jan 17, 2026

Global 'this' capture logic is slightly wrong in <code>--noImplicitThis</code>

Needs InvestigationThis issue needs a team member to investigate its status.This issue needs a team member to investigate its status.

Status: Open.

#63001 In microsoft/TypeScript;

· DanielRosenwasser opened on Jan 16, 2026