ByteArray# return value can lead to trouble
GHC in some circumstances has problems with functions
returning values of type `ByteArray#'. The following is
bogus code, but it shouldn't result in a panic:
module Test
where
import PrelGHC
import PrelBase
import PrelST
die :: Int -> ByteArray#
{-# NOINLINE die #-}
die _ = undefined
foo = I# (indexIntArray# (die 0) 0#)
With GHC 4.11 (couple of weeks old), I get
ghc: panic! (the `impossible' happened):
mkPrimReturnCode: Upd c_sPk
when compiling with
ghc -c -O -fglasgow-exts test.hs
For the problem to occur, both -O and the NOINLINE pragma are
required.
Trac metadata
| Trac field |
Value |
| Version |
None |
| Type |
Bug |
| TypeOfFailure |
OtherFailure |
| Priority |
normal |
| Resolution |
ResolvedFixed |
| Component |
Compiler |
| Test case |
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| Differential revisions |
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| BlockedBy |
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| Related |
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| Blocking |
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| CC |
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| Operating system |
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| Architecture |
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