Panics when making a quotation as pattern synonym
$ ghci -XPatternSynonyms -XViewPatterns -ignore-dot-ghci
GHCi, version 8.0.1: http://www.haskell.org/ghc/ :? for help
Prelude> :m + Language.Haskell.TH
Prelude Language.Haskell.TH> pattern A :: ExpQ; pattern A <- (undefined -> ()) where A = undefined
ghc: panic! (the 'impossible' happened)
(GHC version 8.0.1 for x86_64-unknown-linux):
nameModule system $dIP_a4HS
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Prelude Language.Haskell.TH>
should we be able to use quotations that are pattern synonyms? I have no use for this.
Trac metadata
Trac field | Value |
---|---|
Version | 8.0.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
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