https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81983
--- Comment #7 from Tom de Vries <vries at gcc dot gnu.org> --- Author: vries Date: Tue Feb 12 14:00:59 2019 New Revision: 268796 URL: https://gcc.gnu.org/viewcvs?rev=268796&root=gcc&view=rev Log: [libbacktrace] Handle bsearch with NULL base in dwarf_lookup_pc The call to bsearch in dwarf_lookup_pc can have NULL as base argument when the nmemb argument is 0. The base argument is required to be pointing to the initial member of an array of nmemb objects. It is not specified what constitutes a valid pointer to an array of 0 objects, but glibc declares base with attribute non-null, so the NULL will trigger a sanitizer runtime error. Fix this by only calling bsearch if nmemb != 0. 2019-02-12 Tom de Vries <tdevr...@suse.de> PR libbacktrace/81983 * dwarf.c (dwarf_lookup_pc): Don't call bsearch if nmemb == 0. Modified: trunk/libbacktrace/ChangeLog trunk/libbacktrace/dwarf.c
