[Bug preprocessor/92919] invalid memory access in wide_str_to_charconst when running ucn2.C testcase (caught by hwasan)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92919

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec 14 22:18:53 2019
New Revision: 279399

URL: https://gcc.gnu.org/viewcvs?rev=279399&root=gcc&view=rev
Log:
        PR preprocessor/92919
        * charset.c (wide_str_to_charconst): If str contains just the
        NUL terminator, punt quietly.

Modified:
    trunk/libcpp/ChangeLog
    trunk/libcpp/charset.c