Mark -XAutoDeriveTypeable as deprecated
The language extension -XAutoDeriveTypeable is not needed since #9858 (closed).
It was earlier marked as redundant in GHC documentation. I propose that GHC gives a clear deprecation message.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.4.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |