-ddump-minimal-imports works wrongly

[maeder@…]

the option -ddump-minimal-imports may fail with:

    Failed to load interface for `System.Console.Shell.Types':
      it is hidden (in package Shellac-0.5)

Furthermore full recompilation does not take place, maybe because no-recomp was renamed to force-recomp. (Please check also other -ddump options for recompilation checking.)

[simonpj]

Can you give us a repo case please?

Thanks

Simon

[maeder@…]

get and install shellac http://www.eecs.tufts.edu/~rdocki01/projects/shellac-0.5-source.tar.gz.

Compile the attached module:

maeder@turing:~/haskell/examples> ghc --make -no-recomp -ddump-minimal-imports B.hs
[1 of 1] Compiling B                ( B.hs, B.o )

B.hs:1:0:
    Failed to load interface for `System.Console.Shell.Commands':
      it is hidden (in package Shellac-0.5)

The cause is the use of the data constructor File.

Without -fforce-recomp (or -no-recomp) the module is not recompiled if it was successfully compiled before without -ddump-minimal-imports

B.hs

module B where
import System.Console.Shell

a :: File
a = File "bla"

[simonpj]

Excellent. I was able to reproduce this nicely, thank you. It was a silly bug in the -ddump-minimal-imports code. Thanks for the report and repo case.

I'm not adding a test case because the test is a bit elaborate: build a package and then use it.

MERGE to stable.

Wed Feb 7 10:02:45 GMT 2007 simonpj@…

• Force recompilation on all -ddump flags

Wed Feb 7 10:00:53 GMT 2007 simonpj@…

• Force recompilation with -ddump-minimal-imports

Wed Feb 7 09:49:45 GMT 2007 simonpj@…

• Fix bug in -ddump-minimal imports Trac #1025

[igloo]

Merged.