microsoft / microsoft/TypeScript
--noImplicitThis error is inconsistent
Open
Nobody has claimed this yet.
Bug
Domain: This-Typing
- Dominant language
- Go
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Description
TypeScript Version: 3.0.0-dev.20180707
Code
declare function f(a: any): void;
f(function() {
this.m();
});
f({
callback: function() {
this.m();
}
});
Expected behavior:
With --noImplicitThis, errors in both cases or neither case.
Actual behavior:
Only error in the first case.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No source file or test is named. Start by running the provided TypeScript snippet with --noImplicitThis and trace how the compiler checks this inside the two callback forms. Done means both cases consistently produce an error or neither does, with regression coverage for the behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 42/100