https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78248
--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Martin Liška from comment #6) > Still can't reproduce. Can you please paste output of > gcc-trunk -Os small.c --verbose It fails for me: Program received signal SIGSEGV, Segmentation fault. main () at pr78248.c:16 16 d = b[e]; (gdb) valgrind says: ==18918== Invalid read of size 4 ==18918== at 0x40046C: main (pr78248.c:16) ==18918== Address 0x601000 is not stack'd, malloc'd or (recently) free'd ==18918== ==18918== ==18918== Process terminating with default action of signal 11 (SIGSEGV) ==18918== Access not within mapped region at address 0x601000 ==18918== at 0x40046C: main (pr78248.c:16) ==18918== If you believe this happened as a result of a stack ==18918== overflow in your program's main thread (unlikely but ==18918== possible), you can try to increase the size of the ==18918== main thread stack using the --main-stacksize= flag. ==18918== The main thread stack size used in this run was 10485760.
