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 |