Description:
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Min/max quantifiers '{}' in preg_match() don't seem to match more than 
765 characters.

Reproduce code:
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// $matches[1] contains the first 765 characters of the string $sample:

preg_match("/^(.{765}).*/", $sample, $matches); 

// doesn't match anything:

preg_match("/^(.{766}).*/", $sample, $matches);

// Values from {0} to {765} appear to work fine.  766 onwards, nothing gets matched.

Expected result:
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I expect the same type of behaviour to happen in both cases.

I realize that preg_match() isn't really necessary to match the first x 
characters in a string, but this problem was affecting a more complex 
regex I was doing.  The "matching the first x chars" example was trying 
to isolate where the problem was occurring.