Pipe lost typing for inference generic

[RomanRolginSky]

Bug Report

Current Behavior
Pipe operator resolves type to never instead of correct type of Observable

Expected behavior
Operators' types should be resolved correctly.
The correct type inferred from generic correctly

Reproduction

• REPL or Repo link:
  https://codesandbox.io/s/ts-rx-generics-types-issue-forked-olcxu?file=/src/index.ts

Environment

• Runtime: Reproduces locally on Mac OS 11.1, Node v.12.16.1
• RxJS version: 6.6.7 in codesandbox.io, 6.6.2 locally

Additional context/Screenshots
I tried to reproduce this behavior without rxjs but without success so seems like its somehow relates to rxjs pipe

[cartant]

I don't believe that this is an RxJS problem. Rather, I think it is more likely to be a TypeScript issue.

I tried to reproduce this behavior without rxjs but without success

I would suggest you try reproducing the problem in the TypeScript Playground and reporting it as a TypeScript problem if/when you are able to do so. You can use this Playground as a starting point. As long as the types have a similar structure to what's in RxJS, it should be reproducible.

[RomanRolginSky]

@cartant thank for reply,
I'll try to reproduce the issue with your playground 🙌🏻

[RomanRolginSky]

Typescript project issue link →