Do not suggest deprecated flags
When you misspell the name of a flag, GHC outputs a nice list of similar flags that do exist:
$ ghc-8.0.1 -W-redundant-constraints
ghc: unrecognised flag: -W-redundant-constraints
did you mean one of:
-Wredundant-constraints
-Wno-redundant-constraints
-fwarn-redundant-constraintsBut since the -fwarn flags are deprecated, they should not be suggested. Neither should any of the other deprecated flags.
For a newcomer: the code is compiler/main/DynFlags.hs.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.3 |
| Type | Task |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
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