[ ghc-Bugs-1277825 ] segmentation fault when profiling large case

Bugs item #1277825, was opened at 2005-09-01 00:31
Message generated for change (Comment added) made by simonmar
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Category: Profiling
Group: 6.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: segmentation fault when profiling large case

Initial Comment:
If the attached file is compiled with -prof -auto-all,
the binary produced will segfault (even if RTS
profiling options are not present).  This seems to be
caused by a combination of a case statement with a
large number of branches and a relatively complex value
at the end of each branch - reducing the number of
branches by one or changing any of the data
declarations to newtypes eliminates the segfault.

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>Comment By: Simon Marlow (simonmar)
Date: 2005-09-13 08:51

Message:
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Fergus - are you the original submitter?

What was different about the environment in which the bug
exhibits?

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Comment By: Fergus Henderson (fergus)
Date: 2005-09-05 21:48

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I tried reproducing this using ghc 6.4 on Debian Linux,
but I was unable to reproduce the bug.  The program compiled
fine with "ghc -prof -auto-all bug.hs" and I was able to get
a profile
by running "./a.out +RTS -p" and looking at a.out.prof.

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