Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Appearance settings

Debug Failure. Parameter symbol already has a cached type which differs from newly assigned type. #49383

Copy link
Copy link
Closed
#49740
Closed
Debug Failure. Parameter symbol already has a cached type which differs from newly assigned type.#49383
#49740
Copy link
Assignees
jakebailey
Labels
BugA bug in TypeScriptA bug in TypeScriptFix AvailableA PR has been opened for this issueA PR has been opened for this issue
Milestone
TypeScript 4.8.0
@denis-sokolov

Description

@denis-sokolov
denis-sokolov
opened on Jun 3, 2022
Issue body actions

Bug Report

🔎 Search Terms

Error: Debug Failure. Expected [object Object] === [object Object]. Parameter symbol already has a cached type which differs from newly assigned type

🕗 Version & Regression Information

  • This is a crash
  • This changed between versions 4.6.4 and 4.7.2
  • This is still happening with the currently latest 4.8.0-dev.20220603

⏯ Playground Link

Does not reproduce in the playground, only reproduces in CLI. To reproduce, run tsc code.ts with the code below.

💻 Code

function wrap<Args extends unknown[]>(_: (...args: Args) => void) {}
wrap(({ cancelable } = {}) => {});

🙁 Actual behavior

Error: Debug Failure. Expected [object Object] === [object Object]. Parameter symbol already has a cached type which differs from newly assigned type
    at assignParameterType (node_modules/typescript/lib/tsc.js:64861:26)
    at assignContextualParameterTypes (node_modules/typescript/lib/tsc.js:64826:21)
    at contextuallyCheckFunctionExpressionOrObjectLiteralMethod (node_modules/typescript/lib/tsc.js:65228:29)
    at checkFunctionExpressionOrObjectLiteralMethod (node_modules/typescript/lib/tsc.js:65207:13)
    at checkExpressionWorker (node_modules/typescript/lib/tsc.js:66804:28)
    at checkExpression (node_modules/typescript/lib/tsc.js:66706:38)
    at checkExpressionWithContextualType (node_modules/typescript/lib/tsc.js:66395:28)
    at inferTypeArguments (node_modules/typescript/lib/tsc.js:62905:39)
    at chooseOverload (node_modules/typescript/lib/tsc.js:63565:53)
    at resolveCall (node_modules/typescript/lib/tsc.js:63402:26)

🙂 Expected behavior

No crash.

(Ideally an error about an implicit any)

Reactions are currently unavailable

Metadata

Metadata

Assignees

Labels

BugA bug in TypeScriptA bug in TypeScriptFix AvailableA PR has been opened for this issueA PR has been opened for this issue

Type

No type

Fields

No fields configured for issues without a type.

Projects

No projects

Milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions
    Morty Proxy This is a proxified and sanitized view of the page, visit original site.