Panic Simplifier ticks exhausted with type families
I've tried to compile my vinyl-like records with 7.10.2-rc1 and got:
ghc: panic! (the 'impossible' happened)
(GHC version 7.10.1.20150612 for x86_64-unknown-linux):
Simplifier ticks exhausted
When trying RuleFired Class op rreplace
To increase the limit, use -fsimpl-tick-factor=N (default 100)
If you need to do this, let GHC HQ know, and what factor you needed
To see detailed counts use -ddump-simpl-stats
Total ticks: 225484
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Attached self contained test compiles with 7.10.1, but fails with 7.10.2-rc1 when compiled with optimizations.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.1-rc1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |