https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112828
anlauf at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2023-12-03
Status|UNCONFIRMED |NEW
Keywords| |wrong-code
CC| |anlauf at gcc dot gnu.org
--- Comment #6 from anlauf at gcc dot gnu.org ---
I get this crash with all gfortran versions (>= 7) on x86_64-pc-linux-gnu.
Sometimes optimization needs to be enabled to see this.
Replacing in reallocate the line
character(LEN(array)), allocatable :: array_new(:)
with the actual (constant) length fixes the issue, e.g.
character(LEN=64), allocatable :: array_new(:)
This may be a hint.
In my tests the stat variable only needs to be accessed by the line
if (PRESENT(stat))
it needs not be set explicitly.
Compiling with -fsanitize=address gives at runtime:
- when compiled with -O0:
==30489==ERROR: AddressSanitizer: requested allocation size 0x515f9880000
(0x515f9881000 after adjustments for alignment, red zones etc.) exceeds maximum
supported size of 0x10000000000 (thread T0)
#0 0x1457e8eb4527 in malloc
../../../../gcc-trunk/libsanitizer/asan/asan_malloc_linux.cpp:69
...
- with -Og and higher:
==30533==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x502000000071 at pc 0x152c5cbc8a79 bp 0x7fff0a124100 sp 0x7fff0a1238c0
WRITE of size 64 at 0x502000000071 thread T0
...
(details depend on optimization level).
