http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51834
--- Comment #2 from Prasoon <prasoonsaurav.nit at gmail dot com> 2012-01-12 09:07:52 UTC --- @Richard Guenther Considering the expression i += (i,i++,i) +i; (i,i++,i) involves change in the value of i, however comma introduces a sequence point so very roughly considering it equivalent to func(_some_side_effect_on_i) we have i += func(_some_side_effect_on_i) + i; Do you still think the behavior is well defined? Another C++ example would be ++a = 10; where 'a'is of type int. This invokes UB but there is no warning from the compiler side even after we use this flag. Raising a similar bug for C++ because the differ may be different in C and C++. Thanks Prasoon
