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[Bug libc/12394] thousands grouping bug when rounding requires an extra leading digit


http://sourceware.org/bugzilla/show_bug.cgi?id=12394

Bruno Haible <bruno at clisp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bruno at clisp dot org
          Component|localedata                  |libc
         AssignedTo|libc-locales at sources dot |drepper.fsp at gmail dot
                   |redhat.com                  |com

--- Comment #3 from Bruno Haible <bruno at clisp dot org> 2011-01-12 22:16:47 UTC ---
The bug affects not only the %f directive, but also the %g directive,
and can lead to a segmentation fault in the latter case.

Find attached the test case. How to reproduce:
$ gcc -Wall bug12394.c
$ ./a.out 
Segmentation fault (core dumped)
$ gdb a.out core
(gdb) where
#0  0x00007f70364aeaa4 in __printf_fp () from /lib64/libc.so.6
#1  0x00007f70364a9b4d in vfprintf () from /lib64/libc.so.6
#2  0x00007f70364cbee9 in vsprintf () from /lib64/libc.so.6
#3  0x00007f70364b2118 in sprintf () from /lib64/libc.so.6
#4  0x0000000000400819 in main ()

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