Red Hat Bugzilla – Bug 40244
re_search_2 problem (probably miscompiled glibc)
Last modified: 2016-11-24 10:13:20 EST
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Description of problem:
re_search_2 fails if length2==0 (length of the second half of text).
Steps to Reproduce:
1. compile and run attached test program
Actual Results: it says: BUG
Expected Results: it should say: pos=4
It seems to be a miscompilation of glibc, since if I use exact the same
regex.c from glibc-2.2.2 and compile it along with test program, it works
fine. glibcbug indicates that gcc-2.96-79 was used to compile glibc, while
redhat-7.1 ships with gcc-2.96-81.
Created attachment 18166 [details]
What makes you think it is a miscompilation?
regex code changed quite a bit lately to support multibyte character sets.
Anyway, I've fixed this in http://sources.redhat.com/ml/libc-hacker/2001-05/msg00024.html
it will appear in the next glibc rpms.
Maybe in glibc regex was just compiled with some defines, like MBS_SUPPORT. When
I tried to compile it manually, I did not supply any extra defines.
Fixed in glibc-2.2.3-6 and above.