http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47504
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jason at gcc dot gnu.org,
| |kazu at gcc dot gnu.org
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> 2011-03-16
23:34:25 UTC ---
This is happening because convert_to_integer is doing what seems to me like an
invalid transformation: it forces the arithmetic to be done in unsigned char,
so we end up with char((unsigned char)-2), or char(254), which has
implementation-defined behavior according to the C and C++ standards.
This seems to have been introduced with the fix for PR 25125.
