[Bug fortran/114827] Valgrind reports errors with class(*) assignment

[neil.n.carlson at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114827

--- Comment #4 from Neil Carlson <neil.n.carlson at gmail dot com> ---
Same results with 13.2.0 configured with --enable-valgrind-annotations.

Here's the output with 13.2.0 and gfortran -g -O0 -fsanitize=address foo.f90 :

==1126830==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x602000000071 at pc 0x7fb97cc6b21d bp 0x7ffcd7a79200 sp 0x7ffcd7a789c0
WRITE of size 27 at 0x602000000071 thread T0
    #0 0x7fb97cc6b21c in __interceptor_memmove
../../../../libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:882
    #1 0x4012ca in __copy_character_1 /home/nnc/Codes/petaca/bugs/foo.f90:1
    #2 0x401a14 in foo /home/nnc/Codes/petaca/bugs/foo.f90:11
    #3 0x401cf9 in run /home/nnc/Codes/petaca/bugs/foo.f90:6
    #4 0x401374 in MAIN__ /home/nnc/Codes/petaca/bugs/foo.f90:2
    #5 0x401fc6 in main /home/nnc/Codes/petaca/bugs/foo.f90:2
    #6 0x7fb97c646149 in __libc_start_call_main (/lib64/libc.so.6+0x28149)
(BuildId: e0b579ca7024cf12a2686b60cf49d1d9e3ff6273)
    #7 0x7fb97c64620a in __libc_start_main_impl (/lib64/libc.so.6+0x2820a)
(BuildId: e0b579ca7024cf12a2686b60cf49d1d9e3ff6273)
    #8 0x401194 in _start (/home/nnc/Codes/petaca/bugs/a.out+0x401194)

0x602000000071 is located 0 bytes after 1-byte region
[0x602000000070,0x602000000071)
allocated by thread T0 here:
    #0 0x7fb97ccdc2ef in __interceptor_malloc
../../../../libsanitizer/asan/asan_malloc_linux.cpp:69
    #1 0x4017c9 in foo /home/nnc/Codes/petaca/bugs/foo.f90:11
    #2 0x401cf9 in run /home/nnc/Codes/petaca/bugs/foo.f90:6
    #3 0x401374 in MAIN__ /home/nnc/Codes/petaca/bugs/foo.f90:2
    #4 0x401fc6 in main /home/nnc/Codes/petaca/bugs/foo.f90:2
    #5 0x7fb97c646149 in __libc_start_call_main (/lib64/libc.so.6+0x28149)
(BuildId: e0b579ca7024cf12a2686b60cf49d1d9e3ff6273)
    #6 0x7fb97c64620a in __libc_start_main_impl (/lib64/libc.so.6+0x2820a)
(BuildId: e0b579ca7024cf12a2686b60cf49d1d9e3ff6273)
    #7 0x401194 in _start (/home/nnc/Codes/petaca/bugs/a.out+0x401194)

SUMMARY: AddressSanitizer: heap-buffer-overflow
../../../../libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:882
in __interceptor_memmove
Shadow bytes around the buggy address:
  0x601ffffffd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x601ffffffe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x601ffffffe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x601fffffff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x601fffffff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x602000000000: fa fa 06 fa fa fa 07 fa fa fa 07 fa fa fa[01]fa
  0x602000000080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x602000000100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x602000000180: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x602000000200: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x602000000280: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
==1126830==ABORTING