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"await x as any" - Node PartiallyEmittedExpression did not pass test 'isLeftHandSideExpression' assert triggered

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

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

Help WantedYou can do thisYou can do this

Status: Open.

#62072 In microsoft/TypeScript;

· goldenice opened on Jul 15, 2025

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Backlog

<code>using</code> transform throws when a for body binding shadows the for head binding

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

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

Help WantedYou can do thisYou can do this

Status: Open.

#61714 In microsoft/TypeScript;

· JLHwung opened on May 16, 2025

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Backlog

Crashes on transform and parse (from assertion/debug failures)

BugA bug in TypeScriptA bug in TypeScript

CrashFor flagging bugs which are compiler or service crashes or unclean exits, rather than bad outputFor flagging bugs which are compiler or service crashes or unclean exits, rather than bad output

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Effort: CasualGood issue if you're already used to contributing to the codebase. Harder than "good first issue".Good issue if you're already used to contributing to the codebase. Harder than "good first issue".

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

Help WantedYou can do thisYou can do this

Status: Open.

#58924 In microsoft/TypeScript;

· Roise-yue opened on Jun 19, 2024

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TypeScript 5.6.0

“Lexical environment is not suspended” when visitEachChile

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Status: Open.

#58020 In microsoft/TypeScript;

· cqzooge opened on Apr 1, 2024

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TypeScript 5.6.0

Typescript emits invalid AMD with custom tranformation of export syntax

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Help WantedYou can do thisYou can do this

Status: Open.

#53925 In microsoft/TypeScript;

· dgoldstein0 opened on Apr 20, 2023

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Backlog

Crash when transformer mutates decorators on classes with initialized static fields

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

RescheduledThis issue was previously scheduled to an earlier milestoneThis issue was previously scheduled to an earlier milestone

Status: Open.

#49794 In microsoft/TypeScript;

· rezonant opened on Jul 6, 2022

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TypeScript 5.7.0

Transform for static <code>super.name</code> is incorrect when prototype is mutated

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Status: Open.

#46580 In microsoft/TypeScript;

· evanw opened on Oct 29, 2021

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Backlog

transpileModule miscompiles const/let to var without renaming, shadowing globals

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Status: Open.

#45435 In microsoft/TypeScript;

· andersk opened on Aug 12, 2021

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Backlog

Parser does not reject <code>await a as any ** 1</code>

BugA bug in TypeScriptA bug in TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Effort: ModerateRequires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".Requires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".

Help WantedYou can do thisYou can do this

Status: Open.

#41755 In microsoft/TypeScript;

· JLHwung opened on Dec 1, 2020

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Backlog

ts.createJsxOpeningElement throws <code>Debug Failure. False expression.</code>

BugA bug in TypeScriptA bug in TypeScript

Domain: APIRelates to the public API for TypeScriptRelates to the public API for TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Status: Open.

#24380 In microsoft/TypeScript;

· Nufflee opened on May 24, 2018

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Backlog

Verbose computed property transpilation

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Help WantedYou can do thisYou can do this

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#23759 In microsoft/TypeScript;

· falsandtru opened on Apr 28, 2018

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Backlog

SourceFile.ambientModuleNames is undefined after transform()

BugA bug in TypeScriptA bug in TypeScript

Domain: APIRelates to the public API for TypeScriptRelates to the public API for TypeScript

Domain: API: TransformsRelates to the public transform APIRelates to the public transform API

Help WantedYou can do thisYou can do this

Status: Open.

#19950 In microsoft/TypeScript;

· dherges opened on Nov 12, 2017

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Backlog