[Bug c++/42032] Aliasing errors in stl_tree.h

[paolo dot carlini at oracle dot com]

------- Comment #6 from paolo dot carlini at oracle dot com  2009-11-13 20:51 -------
Note that, as far as I have been told by Richard, the warning itself doesn't
point to an actual miscompilation in 4.4, because (PRE, etc.) aren't strong
enough. Thus, first people should double check that, and in case we could
backport to 4.4. the warning suppression bits (in any case, that warnings are
emitted from system headers is a bug, per se).

Then, as regards mainline, we should, again, check whether actual
miscompilations are taking place, I'm not aware of any. At the time of PR41316,
I went quickly through the code and didn't find any problematic series of up
and down casts outside (the still very experimental, I'm working on it while we
are speaking) forward_list. 


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42032