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Inconsistent typing of endless generators between functions and lambdas

Status: Open.

#63970 In microsoft/TypeScript;

· Jacek Kopecký (jacekkopecky) opened on Aug 23, 2026

Performance regression for declaration emit of an oversized inferred type

Status: Open.

#63966 In microsoft/TypeScript;

· Daniel Lockyer (daniellockyer) opened on Aug 23, 2026

Crash: optional chain + tagged template panics the optional-chain transform

Status: Open.

#63965 In microsoft/TypeScript;

· Daniel Lockyer (daniellockyer) opened on Aug 23, 2026

Crash: malformed super destructuring in a decorated class static block panics

Status: Open.

#63964 In microsoft/TypeScript;

· Daniel Lockyer (daniellockyer) opened on Aug 23, 2026

Crash: malformed object destructuring assignment panics in class fields transform

Status: Open.

#63963 In microsoft/TypeScript;

· Daniel Lockyer (daniellockyer) opened on Aug 23, 2026

Crash: class-level decorator on an anonymous class panics during ES decorator emit

Status: Open.

#63962 In microsoft/TypeScript;

· Daniel Lockyer (daniellockyer) opened on Aug 23, 2026

TS 7.0.2 (tsgo): augmentation of a type-only re-exported interface resolves order-dependently — same file set passes via explicit include list, fails via directory glob

Status: Open.

#63960 In microsoft/TypeScript;

· DoodleBear (DoodleBears) opened on Aug 22, 2026

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

Status: Open.

#63959 In microsoft/TypeScript;

· Duncan Holm (frou) opened on Aug 22, 2026

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

Status: Open.

#63958 In microsoft/TypeScript;

· Muhammad Abdullah khan (Abdullah-Builds) opened on Aug 22, 2026

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

Status: Open.

#63949 In microsoft/TypeScript;

· Arthur Neuman (exoRift) opened on Aug 21, 2026

LSP Panic: overlay not found for changed file

Needs More InfoThe issue still hasn't been fully clarifiedThe issue still hasn't been fully clarified

Status: Open.

#63946 In microsoft/TypeScript;

· Niklas Correnz (uncaught) opened on Aug 21, 2026

LSP server sends no per-file diagnostics to clients without pull diagnostics support

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

Status: Open.

#63928 In microsoft/TypeScript;

· Christian Vuerings (christianvuerings) opened on Aug 20, 2026