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[ft-devel] Undefined behavior
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From: |
Behdad Esfahbod |
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Subject: |
[ft-devel] Undefined behavior |
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Date: |
Fri, 08 Aug 2014 16:56:22 -0400 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.0 |
This commit:
commit 177982e933ed6f2ab96163e14f4267f8abe89efd
Author: Alexei Podtelezhnikov <address@hidden>
Date: Tue Jul 15 23:54:34 2014 -0400
* src/base/ftcalc.c (FT_MSB): Utilize gcc builtins.
introduced undefined behavior, since __builtin_clz and __builtin_ctz have
undefined behavior if passed in value is zero.
This can actually happen with degenerate glyph outlines. It might be
harmless, but it's something that should be fixed.
Thanks,
--
behdad
http://behdad.org/
- [ft-devel] Undefined behavior,
Behdad Esfahbod <=
Re: [ft-devel] Undefined behavior, Alexei Podtelezhnikov, 2014/08/11