Description:
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The following call :
$matches = preg_match_all($pattern, $str);
will not lead to an error message saying that one parameter is missing, but the interpreter crashes, and the following message is displayed :
"CGI Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are:"
(no header specified in the message)

The correct call :
preg_match_all($pattern, $str, $matches);
works properly.



Reproduce code:
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$matches = preg_match_all($pattern, $str);

Expected result:
----------------
Warning: Wrong parameter count for preg_match_all()

Actual result:
--------------
CGI Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers. The headers it did return are: