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Dormant
OpenJun 23, 2026
No due date
•Last updated Dormant issues are defects that still exist as far as we know, but don't warrant additional investment and are not high-priority. This is typically due to one or more factors, such as:
- Requiring an uncommon or discouraged configuration
- Coding patterns that aren't idiomatic TS/JS
- Minimal impact (e.g. error message phrasing that is only wrong in degenerate cases)
- Low likelihood of encounter (e.g. requires very specific and unusual steps to observe)
- Existence of a straightforward workaround
PRs for issues in this milestone are accepted, but will require stronger justification in terms of risk, complexity, and performance cost. Invasive, hard-to-review, or otherwise overly impactful PRs targeting issues in this milestone won't be merged.
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Incorrect Chinese Translation for 'initializer' and Incorrect Use of Chinese Quotation Marks
BugA bug in TypeScriptA bug in TypeScriptDomain: Something ElseFallback label when we just can't figure anything else outFallback label when we just can't figure anything else outFix AvailableA PR has been opened for this issueA PR has been opened for this issueStatus: Open.#58130 In microsoft/TypeScript;Incorrect union type inference for conjunction with strictNullChecks disabled
BugA bug in TypeScriptA bug in TypeScriptDomain: check: Type InferenceRelated to type inference performed during signature resolution or `infer` type resolutionRelated to type inference performed during signature resolution or `infer` type resolutionStatus: Open.#31789 In microsoft/TypeScript;Source Map includes mapping for line ending characters
BugA bug in TypeScriptA bug in TypeScriptStatus: Open.#34695 In microsoft/TypeScript;Regression in generic inference with JSX in v5.7+
Domain: JSX/TSXRelates to the JSX parser and emitterRelates to the JSX parser and emitterHelp WantedYou can do thisYou can do thisPossible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some casesStatus: Open.#62140 In microsoft/TypeScript;Double slash comment
//will be wrongly removed in the trailing position of the object attributeDomain: Comment EmitThe issue relates to the emission of comments when compilingThe issue relates to the emission of comments when compilingHelp WantedYou can do thisYou can do thisPossible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some casesStatus: Open.#56055 In microsoft/TypeScript;Enum value
1 / 0incorrectly transformed if there isInfinitydeclared in scopeBugA bug in TypeScriptA bug in TypeScriptDomain: enumEnums and their associated types/valuesEnums and their associated types/valuesFix AvailableA PR has been opened for this issueA PR has been opened for this issueHelp WantedYou can do thisYou can do thisStatus: Open.#55091 In microsoft/TypeScript;Using declarations like a statement leads to strange bugs.
BugA bug in TypeScriptA bug in TypeScriptDomain: check: Control FlowThe issue relates to control flow analysisThe issue relates to control flow analysisFix AvailableA PR has been opened for this issueA PR has been opened for this issueHelp WantedYou can do thisYou can do thisStatus: Open.#62896 In microsoft/TypeScript;Double error message when referencing variable of type union of string literals from ambient declaration
Domain: Error MessagesThe issue relates to error messagingThe issue relates to error messagingFix AvailableA PR has been opened for this issueA PR has been opened for this issueHelp WantedYou can do thisYou can do thisPossible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some casesStatus: Open.#63050 In microsoft/TypeScript;Confusing error message (2322), should use (2741) and (2322) error message when this["XXX"] = {...} has a missing (or mispelled) key or an incompatible value.
BugA bug in TypeScriptA bug in TypeScriptDomain: Error MessagesThe issue relates to error messagingThe issue relates to error messagingHelp WantedYou can do thisYou can do thisStatus: Open.#63206 In microsoft/TypeScript;Error on function return is less useful than it should be
Domain: check: Contextual TypesThe issue relates to contextual typesThe issue relates to contextual typesPossible ImprovementThe current behavior isn't wrong, but it's possible to see that it might be better in some casesThe current behavior isn't wrong, but it's possible to see that it might be better in some casesStatus: Open.#63357 In microsoft/TypeScript;Inside a generic function with a remapped type as parameter, elements are wrongfully inferred as {}.
Needs InvestigationThis issue needs a team member to investigate its status.This issue needs a team member to investigate its status.Status: Open.#63363 In microsoft/TypeScript;The module namespace object returned by __importStar is not the same when import the same module multiple times
BugA bug in TypeScriptA bug in TypeScriptDomain: JS EmitThe issue relates to the emission of JavaScriptThe issue relates to the emission of JavaScriptFix AvailableA PR has been opened for this issueA PR has been opened for this issueStatus: Open.#63391 In microsoft/TypeScript;new super()in static method does not cause errorBugA bug in TypeScriptA bug in TypeScriptDomain: classesBehavior of various `class` constructs, e.g. mixins or base classesBehavior of various `class` constructs, e.g. mixins or base classesFix AvailableA PR has been opened for this issueA PR has been opened for this issueStatus: Open.#63451 In microsoft/TypeScript;Incorrect type resolution with nested constructors
BugA bug in TypeScriptA bug in TypeScriptDomain: classesBehavior of various `class` constructs, e.g. mixins or base classesBehavior of various `class` constructs, e.g. mixins or base classesFix AvailableA PR has been opened for this issueA PR has been opened for this issueStatus: Open.#63559 In microsoft/TypeScript;