https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87931
David Binderman <dcb314 at hotmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dcb314 at hotmail dot com --- Comment #2 from David Binderman <dcb314 at hotmail dot com> --- Might be related to this: ==6494==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffcf43dbd58 at pc 0x000002cfffdd bp 0x7ffcf43da650 sp 0x7ffcf43da648 READ of size 8 at 0x7ffcf43dbd58 thread T0 #0 0x2cfffdc in vectorizable_reduction(_stmt_vec_info*, gimple_stmt_iterator*, _stmt_vec_info**, _slp_tree*, _slp_instance*, vec<stmt_info_for_cost, va_heap, vl_ptr>*) ../../trunk/gcc/tree-vect-loop.c:6485