Package: clang
Version: 2.6-3
Severity: normal
File: /usr/bin/clang
The prototype of the __builtin_expect() macro is supposed to be:
long __builtin_expect(long exp, long c);
In clang 2.6 this is incorrectly implemented as:
int __builtin_expect(int exp, int c);
This can cause a silent integer overflow with values of exp larger than
INT_MAX on a 64-bit platform. Upstream has committed a fix in SVN r85666,
and the fix is incorporated into clang 2.7.
The libdispatch package has been patched to workaround this bug.
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