Come up with a better name for `tcExtendTyVarEnv2`
It must be different somehow from tcExtendTyVarEnv but without reading the source code, it's hard to tell what the difference is.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.2.2 |
| Type | Task |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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| Blocking | |
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| Architecture |