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85be74f295
This simple testcase: locale_t st = newlocale(LC_ALL_MASK, "C", (locale_t)0); locale_t st2 = newlocale(LC_CTYPE_MASK, "en_US.UTF-8", st); is sufficient to reproduce a crash in _newlocale_r. After the first call to newlocale, `st' points to __C_locale, which is const. When using `st' as locale base in the second call, _newlocale_r tries to set pointers inside base to NULL. This is bad if base is __C_locale, obviously. Add a test to avoid trying to overwrite pointer values inside base if base is __C_locale. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>