http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54582

--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2013-02-06 
13:39:32 UTC ---
(In reply to comment #7)
> Because object sizes are finalized only during the objsz pass, after lots of
> optimization passes.  Note, as I said earlier, what matters most is that the
> check is performed at runtime in that case and thus the source code bug can't
> be exploited.  The warning is just to let the user know earlier than at
> runtime, when easily possible.

Maybe we are talking about different things. cppcheck seems to be able to give
the warning without any optimizations. The FE doesn't know that buf[2] is
length 2 and "ab" is length 3?

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