"ghc: panic! (the 'impossible' happened)"
When running tasty-hunit tests through cabal repl
, I get the following error:
ghc: panic! (the 'impossible' happened)
(GHC version 7.8.3 for x86_64-apple-darwin):
Loading temp shared object failed: dlopen(/var/folders/l6/v2vhn_3j6bb1yvp6k5sh2hv80000gp/T/ghc80357_0/ghc80357_61.dylib, 9): Symbol not found: __hpc_tickboxes_horsezmcontrolzm0zi1zi0zi0_HorseziCommands_hpc
Referenced from: /var/folders/l6/v2vhn_3j6bb1yvp6k5sh2hv80000gp/T/ghc80357_0/ghc80357_61.dylib
Expected in: flat namespace
in /var/folders/l6/v2vhn_3j6bb1yvp6k5sh2hv80000gp/T/ghc80357_0/ghc80357_61.dylib
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
I have a hunch that it's because I enabled the following flags in my .cabal file, since I didn't get the exception before adding them:
Test-Suite test-horse
...
GHC-Options: -fhpc -hpcdir dist/hpc/horse-control-1.0
When I run the tests via cabal test
, I don't get the exception.
I've created a branch that showcases the crash: https://github.com/bgwines/horse-control/tree/ghc-panic
Repro steps:
- clone repo
- cd to repo
- run
cabal repl
- run
:l Tests/test-horse.hs
- run
main
Reproducability: 100%
Please feel free to contact me if there's information lacking, here! :)
Trac metadata
Trac field | Value |
---|---|
Version | 7.10.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |