https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60576
--- Comment #48 from Harald Anlauf <anlauf at gcc dot gnu.org> --- (In reply to Jerry DeLisle from comment #47) > I have a proposed fix I am posting on the lists for review. Hi Jerry! The patch posted in https://gcc.gnu.org/pipermail/fortran/2026-June/064021.html works for your new testcase, but it still fails for me on the original one: % gfc-17 assumed_rank_7.f90 -fsanitize=address -g -O && ./a.out ================================================================= ==229914==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7bc6b00f0098 at pc 0x7fc6b272700c bp 0x7fff508c3f50 sp 0x7fff508c3710 READ of size 360 at 0x7bc6b00f0098 thread T0 #0 0x7fc6b272700b in memcpy ../../../../gcc-trunk/libsanitizer/sanitizer_common/sanitizer_common_interceptors_memintrinsics.inc:117 #1 0x000000401dfe in MAIN__ /home/anlauf/gcc-bugs/assumed_rank_7.f90:25 #2 0x0000004029fe in main /home/anlauf/gcc-bugs/assumed_rank_7.f90:29 #3 0x7fc6b1f4933f in __libc_start_call_main (/lib64/libc.so.6+0x2a33f) (BuildId: 006575e9bb6ed7fbad2200bd738302755ce502d4) #4 0x7fc6b1f49408 in __libc_start_main_alias_1 (/lib64/libc.so.6+0x2a408) (BuildId: 006575e9bb6ed7fbad2200bd738302755ce502d4) #5 0x0000004011e4 in _start ../sysdeps/x86_64/start.S:115 Address 0x7bc6b00f0098 is located in stack of thread T0 at offset 152 in frame #0 0x000000401a6e in MAIN__ /home/anlauf/gcc-bugs/assumed_rank_7.f90:11 This frame has 8 object(s): [32, 48) 'FRAME.30' (line 11) [64, 152) 'at' (line 17) [192, 280) 'atmp.22' (line 26) <== Memory access at offset 152 partially underflows this variable [320, 408) 'parm.27' (line 27) <== Memory access at offset 152 partially underflows this variable [448, 856) 'class.19' (line 24) <== Memory access at offset 152 partially underflows this variable [928, 1336) 'class.20' (line 25) [1408, 1816) 'class.13' (line 39) [1888, 2296) 'class.13' (line 39) HINT: this may be a false positive if your program uses some custom stack unwind mechanism, swapcontext or vfork (longjmp and C++ exceptions *are* supported) SUMMARY: AddressSanitizer: stack-buffer-overflow /home/anlauf/gcc-bugs/assumed_rank_7.f90:25 in MAIN__ Shadow bytes around the buggy address: 0x7bc6b00efe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x7bc6b00efe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x7bc6b00eff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x7bc6b00eff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x7bc6b00f0000: f1 f1 f1 f1 00 00 f2 f2 00 00 00 00 00 00 00 00 =>0x7bc6b00f0080: 00 00 00[f2]f2 f2 f2 f2 00 00 00 00 00 00 00 00 0x7bc6b00f0100: 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 0x7bc6b00f0180: 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 0x7bc6b00f0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x7bc6b00f0280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x7bc6b00f0300: 00 00 00 00 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==229914==ABORTING
