Opened 9 years ago

Closed 9 years ago

#4384 closed bug (fixed)

building hashed-storage 0.4.3: Expected one of wanted constraints (BUG)

Reported by: dsf Owned by:
Priority: normal Milestone:
Component: Compiler Version: 7.1
Keywords: Cc:
Operating System: Linux Architecture: x86
Type of failure: Compile-time crash Test Case:
Blocked By: Blocking:
Related Tickets: Differential Rev(s):
Wiki Page:


Using GHC 7.0.1-rc1 with the patch for trac#4345, while compiling Storage.Hashed.Monad from version 0.4.3 of the hashed-storage package I get the following message:

ghc: panic! (the 'impossible' happened)
  (GHC version 7.0.0 for i386-unknown-linux):
        Expected one of wanted constraints (BUG)

This is from The bug still occurs using the latest version, 0.5.3.

Change History (4)

comment:1 Changed 9 years ago by simonpj

Status: newinfoneeded

I believe this is already fixed in the HEAD. Can you try with that? Or await RC2, and try then. Thanks.


comment:2 Changed 9 years ago by dsf

I wasn't able to build HEAD - it said it couldn't make utils/runghc/runghc.cabal, due to an Oct 6 patch. I'll try backing out some patches.

comment:3 Changed 9 years ago by dsf

Yes, this is fixed in HEAD.

comment:4 Changed 9 years ago by simonpj

Resolution: fixed
Status: infoneededclosed


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