Description:
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When I try use preg_match_all( $regexp, $a, $vysl);
it crashes when $a contains text in format like in file here: http://www.contipromotor.cz/download/phpBug3800chars.htm.
Basically it contains 'abbba(3799 times char s or \r\n)xa'
 Just delete the last 'x' and it works fine.

Reproduce code:
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$a = I read content of file http://www.contipromotor.cz/download/phpBug3800chars.htm

$regexp = "/a(.*)a((?:.|\n)*?)a/i";

if(preg_match_all( $regexp, $a, $vysl))
  echo "found";
else
  echo "not found";

Expected result:
----------------
"found" or "not found"

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