[Bug c++/67484] New: options-save.c sanitizer asan detects freed storage referenced heap-use-after-free

["zeccav at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67484

            Bug ID: 67484
           Summary: options-save.c sanitizer asan detects freed storage
                    referenced  heap-use-after-free
           Product: gcc
           Version: 5.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zeccav at gmail dot com
  Target Milestone: ---

//g++ references freed storage
//sanitizer message: heap-use-after-free
//referenced at options-save.c:3556 "|| strcmp (ptr1->x_ix86_arch_string,
ptr2->x_ix86_arch_string)))" 
//ptr1->x_ix86_arch_string was freed at gcc/config/i386/i386.c:5020 "free
(option_strings[i]);"
//to make happy the sanitizer I commented out the for loop in i386.c lines
5019-5020
//// Target: x86_64-unknown-linux-gnu
int fum () __attribute__ ((target("default")));
int fum () __attribute__ ((target("arch=core2")));
int j = fum();