[Bug c++/31268] Non-deterministic bug producing a run-time infinite loop

["sylvain dot pion at sophia dot inria dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #10 from sylvain dot pion at sophia dot inria dot fr  2007-03-26 18:03 -------
Let me mention that this is against 4.2.  The trunk works well for me.
I tried several times during March (including today), and the bug is still
here.

Note that varrying the conditions slightly (even removing an innocent unused
typedef) makes it work, so I'm not surprised that testing on x86_64 or powerpc
makes it also work.  It sounds like usage of uninitialized memory or some bad
non-deterministic bug of this kind, although a quick test with valgrind did not
show anything.

Here are more details about my configuration: Fedora Core 5 on x86, compiler
built with:
> .../g++ -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: /proj/geometrica/home/GCC/gcc-4_2-branch/configure
--disable-shared --disable-nls --enable-languages=c++
--prefix=/proj/geometrica/home/GCC/Linux-fc5-4.2
Thread model: posix
gcc version 4.2.0 20070324 (prerelease)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31268