#3591: A working program reports <<loop>> when compiled with -O
---------------------+------------------------------------------------------
Reporter: blamario | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.10.4 | Severity: normal
Keywords: | Testcase:
Os: Linux | Architecture: x86_64 (amd64)
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If the attached module Trampoline.hs is compiled with no optimizations it
works:
{{{
$ ghc --make Trampoline.hs
[1 of 1] Compiling Main ( Trampoline.hs, Trampoline.o )
Linking Trampoline ...
$ ./Trampoline
...
((5,2),(1,2,6))
$
}}}
With optimizations on, it hangs:
{{{
$ ghc --make Trampoline.hs -O
[1 of 1] Compiling Main ( Trampoline.hs, Trampoline.o )
Linking Trampoline ...
$ ./Trampoline
bounce start
bounce end
liftOut
inject suspend
Trampoline: <<loop>>
}}}
That doesn't seem right. Oh, GHCi runs it with no problem as well.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3591>
GHC <http://www.haskell.org/ghc/>
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