
Invalid write of size 1
   at 0x........: main (badaddrvalue.c:8)
   by 0x........: __libc_start_main (...libc...)
   by 0x........: ...
   Address 0x........ is 1 bytes before a block of size 8 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badaddrvalue.c:7)
   by 0x........: __libc_start_main (...libc...)
   by 0x........: ...

Invalid read of size 1
   at 0x........: main (badaddrvalue.c:9)
   by 0x........: __libc_start_main (...libc...)
   by 0x........: ...
   Address 0x........ is 1 bytes before a block of size 8 alloc'd
   at 0x........: malloc (vg_replace_malloc.c:...)
   by 0x........: main (badaddrvalue.c:7)
   by 0x........: __libc_start_main (...libc...)
   by 0x........: ...

ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)
malloc/free: in use at exit: 8 bytes in 1 blocks.
malloc/free: 1 allocs, 0 frees, 8 bytes allocated.
For a detailed leak analysis,  rerun with: --leak-check=yes
For counts of detected errors, rerun with: -v