In a record-update construct:ghc-stage2: panic! (the 'impossible' happened)
While compiling Repro.hs
with HEAD
I get this:
$ ~/local/ghc-inaccessible-right-side/inplace/bin/ghc-stage2 Repro.hs
[1 of 1] Compiling Repro ( Repro.hs, Repro.o )
Repro.hs:22:35: warning: [-Woverlapping-patterns]
Pattern match has inaccessible right hand side
In a record-update construct:ghc-stage2: panic! (the 'impossible' happened)
(GHC version 8.1.20161209 for x86_64-unknown-linux):
unused
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
It doesn't reproduce on 7.10.2. I'm 90% sure it reproduces on 8.0.2 (I have a branch with some unrelated patches).
Trac metadata
Trac field | Value |
---|---|
Version | |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |