Description:
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PHP6-200704160630 snapshot compiled with --prefix, --with-apxs2 and --config-path options. Apache 2.2.4. If setcookie() tries to delete session cookie, it causes 'zend_mm_heap corrupted' error or segfault in apache logs.

I have found other bug reports about 'zend_mm_heap corrupted' error, but they are closed in February or March. I can reproduce crash in current PHP6 snapshot. Code does not crash if fourth argument is set to '/'. Script is called from /path/ directory.


Reproduce code:
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session_start();
setcookie(session_name(), '', 0, '/path');
die('test');


Expected result:
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test

Actual result:
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Browser tries to download php script and I get 'zend_mm_heap corrupted' message in error_log.

Real code generated 'child pid #### exit signal Segmentation fault (11)'. I wanted to simplify code and got zend_mm_heap error instead of segfault.