#5742: compiler option -XDoRec crash
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Reporter: Huenniger | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.2.1 | Keywords: frisby recusive do -XDoRec
Os: Unknown/Multiple | Architecture: x86
Failure: Compile-time crash | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by Huenniger):
I could work around this problem by using mfix instead of do rec.
The reason for the error seems to be
Grammer.hs:580:14:
A 570-tuple is too large for GHC
(max size is 62)
Workaround: use nested tuples or define a data type
So yeah the do rec expression needs to be converted to a mfix expression
and that needs a tuple with 580 elements which can not be used in ghc.
Still what needs to be done is to give a proper error message in this case
instead of just producing a linking error.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5742#comment:2>
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