From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020529 Description of problem: __tgammal(NaN) tests an uninitialized local variable because __ieee754_gammal_r does not set *signgam for a NaN. -----sysdeps/generic/w_tgammal.c:37 y = __ieee754_gammal_r(x,&local_signgam); if (local_signgam < 0) y = -y; ----- -----sysdeps/ieee754/ldbl-96/e_gammal_r.c:47 if ((es & 0x7fff) == 0x7fff && ((hx & 0x7fffffff) | lx) != 0) /* NaN, return it. */ return x; ----- Version-Release number of selected component (if applicable): glibc-2.3.2-11.9 How reproducible: Always Steps to Reproduce: 1.Run testcase math/test-ldouble and watch when x==NaN. 2. 3. Actual Results: local_signgam is tested even though its value has not been set. Expected Results: local_signgam is tested only when its value has been set. Additional info: It would be more efficient if __ieee754_gammal_r just set "*signgam = 0;" immediately upon entry, instead of for [almost-]every boundary case.
An errata has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2003-136.html