mg_arg_tys in MatchGroup should be a PostTc field
It appears that mg_arg_tys
is only populated after typechecking but the type does not indicate this.
Instead of
mg_arg_tys :: [PostTc p Type]
the type should be
mg_arg_tys :: PostTc p [Type]
All that needs doing is modifying this type in compiler/HsSyn/HsExpr.hs and then fixing the resulting compiler errors.
Trac metadata
Trac field | Value |
---|---|
Version | 8.2.2 |
Type | Task |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |