[Bug libc/10969] New: duplocale crashes

["bruno at clisp dot org" <sourceware-bugzilla at sourceware dot org>]

The function call duplocale (LC_GLOBAL_LOCALE) crashes.
According to POSIX
<http://www.opengroup.org/onlinepubs/9699919799/functions/duplocale.html>
and <http://www.opengroup.org/onlinepubs/9699919799/basedefs/locale.h.html>
it should instead return a duplicate copy of the global locale.

How to reproduce:
Compile and run the attached program.

Rationale:
1) POSIX says that LC_GLOBAL_LOCALE is "a special locale object descriptor",
   and the argument of duplocale has to be "a locale object" without further
   constraints.
2) The POSIX specification of newlocale says "The results are undefined if
   the base argument is the special locale object LC_GLOBAL_LOCALE" but similar
   wording is not present in the POSIX specification of duplocale.
3) The call works fine on MacOS X 10.5.
4) POSIX does not foresee any other way to create a copy of the global locale
   than through duplocale:
      newlocale (LC_ALL_MASK, "", LC_GLOBAL_LOCALE)
   has undefined behaviour, and
      newlocale (LC_ALL_MASK, nl_langinfo (_NL_LOCALE_NAME (LC_COLLATE)), NULL)
   uses API that is specific to glibc, not present in POSIX.

-- 
           Summary: duplocale crashes
           Product: glibc
           Version: 2.8
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper at redhat dot com
        ReportedBy: bruno at clisp dot org
                CC: glibc-bugs at sources dot redhat dot com
 GCC build triplet: x86_64-suse-linux
  GCC host triplet: x86_64-suse-linux
GCC target triplet: x86_64-suse-linux


http://sourceware.org/bugzilla/show_bug.cgi?id=10969

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