[Bug fortran/92184] New: [ASAN] errors in bootstrap

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92184

            Bug ID: 92184
           Summary: [ASAN] errors in bootstrap
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

I tried an asan bootstrap on fortran with recent bootstrap and got this:

================================================================
==230053==ERROR: AddressSanitizer: heap-use-after-free on address
0x6140000692a0 at pc 0x00000306907a bp 0x7fffad4ef940 sp 0x7fffad4ef938
READ of size 8 at 0x6140000692a0 thread T0
    #0 0x3069079 in vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*)
../../trunk/gcc/tree-vect-loop.c:2394

Problem seems to first appear sometime between revision 277000 and 277250.
Configure line is

../trunk/configure --prefix=/home/dcb/gcc/results.277250.asan \
    --with-build-config=bootstrap-asan \
    --disable-multilib \
    --disable-werror \
    --enable-checking=yes \
    --enable-languages=c,c++,fortran