[cairo] cairo crash in _cairo_hash_string

[Carl Worth]

On Wed, 17 Aug 2005 11:46:33 -0700, Bill Spitzak wrote:
> You may want null and zero-length strings to hash differently.

I can't imagine any reason why, (at least in the context of font
filenames as we're talking about here).

But, as it turns out, the NULL-filename case that was triggering this
bug also never uses the hash value anyway. It's fixed in CVS to not
even try computing a hash value in this case.

-Carl
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