https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117367
--- Comment #3 from Sam James <sjames at gcc dot gnu.org> ---
ASAN says:
==3038484==ERROR: AddressSanitizer: global-buffer-overflow on address
0x5bb17fa7e4a1 at pc 0x5bb17fa794c3 bp 0x7ffdda66b1e0 sp 0x7ffdda66b1d0
READ of size 1 at 0x5bb17fa7e4a1 thread T0
#0 0x5bb17fa794c2 in v /tmp/p.c:19
#1 0x5bb17fa794c2 in h /tmp/p.c:25
#2 0x5bb17fa794c2 in r /tmp/p.c:35
#3 0x5bb17fa784aa in main /tmp/p.c:48
#4 0x7d58a6203746 in __libc_start_call_main
../sysdeps/nptl/libc_start_call_main.h:58
#5 0x7d58a62037f6 in __libc_start_main_impl ../csu/libc-start.c:360
#6 0x5bb17fa78510 in _start (/tmp/p+0x510)
0x5bb17fa7e4a1 is located 0 bytes after global variable 'c' defined in
'/tmp/p.c:5:6' (0x5bb17fa7e4a0) of size 1
'c' is ascii string ''
SUMMARY: AddressSanitizer: global-buffer-overflow /tmp/p.c:19 in v
Shadow bytes around the buggy address:
0x5bb17fa7e200: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x5bb17fa7e280: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x5bb17fa7e300: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
0x5bb17fa7e380: 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9 04 f9 f9 f9
0x5bb17fa7e400: f9 f9 f9 f9 04 f9 f9 f9 f9 f9 f9 f9 00 f9 f9 f9
=>0x5bb17fa7e480: f9 f9 f9 f9[01]f9 f9 f9 f9 f9 f9 f9 00 00 00 00
0x5bb17fa7e500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x5bb17fa7e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x5bb17fa7e600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x5bb17fa7e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x5bb17fa7e700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
