-ddump-minimal-imports vs. re-exported class methods
Please excuse me reporting a bug without testing it with the latest released version, but I only have easy access to 6.12.1 now.
The following working import line:
import Darcs.Patch
is turned by ghc -ddump-minimal-imports into
import Darcs.Patch
( Invert(invert), FromPrims(fromPrims), namepatch )
which does not work:
$ ghc -ddump-minimal-imports --make ipatch.hs
[2 of 8] Compiling Common ( Common.hs, Common.o )
Common.hs:20:6:
Module `Darcs.Patch' does not export `Invert(invert)'
Common.hs:20:22:
Module `Darcs.Patch' does not export `FromPrims(fromPrims)'
The line
import Darcs.Patch ( invert, fromPrims, namepatch )
works though.
The reason seems to be this chain of imports (shortend of course):
module Darcs.Patch.Patchy ( Invert(..) ) where
class MyEq p => Invert p where
invert :: p C(x y) -> p C(y x)
is re-exported without the Class name by
module Darcs.Patch ( invert ) where
import Darcs.Patch.Patchy ( invert )
.
Trac metadata
Trac field | Value |
---|---|
Version | 6.12.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |