Comments (1)
Minimal PADS example:
[pads| data Entry = Entry { host :: (Int, '.', Int, '.', Int, '.', Int) } |]
which triggers the following GHC hang / panic:
[27 of 28] Compiling Examples.AI ( Examples/AI.hs, .stack-work/dist
xamples-tmp/Examples/AI.o )
ghc: panic! (the 'impossible' happened)
(GHC version 8.0.2 for x86_64-unknown-linux):
Simplifier ticks exhausted
When trying UnfoldingDone $wlvl_sg2Ag
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: 6861563
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
It appears to have something to do with nesting a tuple type inside of a record making it difficult for GHC to deduce the type of the entry_parseM
function.
from pads-haskell.
Related Issues (8)
- Make a style guide HOT 1
- Thorough haddock documentation & getting pads on hackage
- Consider using State monad for metadata in PadsParser
- Bug in seekSep / parseManySepTerm
- Data types and parsing functions created by the pads quasiquoter should have haddock documentation
- Cleanup extra-source-files in package.yaml HOT 1
- Generators: order of generation for context-sensitivity HOT 1
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from pads-haskell.