Description:
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According to man page for memcpy(3) the function should not be used with overlapping source and destination arguments.  A recent update to Zend/zend_exceptions.c (commit: http://git.php.net/?p=php-src.git;a=commitdiff;h=afa03a470ef90a53f2b59a8175f77afdb6b5a651) introduced formatting of trace's arguments where it uses memcpy() with overlapping addresses.  This causes issues on at least systems with glibc 2.3.6 and the testsuite on such systems fails.

If one replaces memcpy() with memmove() the testsuite will pass again.

P.S. I believe that there should be a more efficient way to achieve the string formatting since re-allocating string byte by byte should be very inefficient, but this is unrelated to the bug at hand.