https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88973
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #4)
> I've created a test case using the canonicalize_pathname function showing
> that it does, in fact, cause an overlap to take place. The following line
> in the output of the test case
>
Thank you very much Martin for it! Btw. ASAN prints nice error about
overlapping arguments:
gcc -DPATHNAME='"/home//marxin"' -Wall canonicalize_pathname.c
-fsanitize=address -g && ./a.out
=================================================================
==14653==ERROR: AddressSanitizer: strcpy-param-overlap: memory ranges
[0x602000000016,0x60200000001d) and [0x602000000017, 0x60200000001e) overlap
#0 0x7ffff72051de (/usr/lib64/libasan.so.5+0x4b1de)
#1 0x40137c in canonicalize_pathname /tmp/canonicalize_pathname.c:25
#2 0x401857 in main /tmp/canonicalize_pathname.c:64
#3 0x7ffff7018b7a in __libc_start_main ../csu/libc-start.c:308
#4 0x4010e9 in _start (/tmp/a.out+0x4010e9)
