A working program reports <<loop>> when compiled with -O
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.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.10.4 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |