Top level splice in Template Haskell has over-ambitious lexical scope?
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-linux):
nameModule b_a2PR{tv}
While working on this project https://github.com/mightybyte/snaplet-postgresql-simple I encountered a GHC panic. To reproduce, check out revision 6573d4359c5cb7699c931c44ebf1bf135099f83b (currently HEAD of the master branch), cabal install it, then go to the example directory and build with "ghc --make Site.hs".
This has caused the crash for me on two different Linux systems with GHC 7.4.1. I realize it requires building a large number of package dependencies, but I have no idea of how to construct a smaller test case. It should be pretty easy to build these dependencies with cabal or cabal-dev.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.4.1 |
| Type | Bug |
| TypeOfFailure | CompileTimeCrash |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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| Related | |
| Blocking | |
| CC | |
| Operating system | |
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