Invalid write of size 8
   at 0x........: foo (stackerr.c:27)
   by 0x........: bar (stackerr.c:32)
   by 0x........: main (stackerr.c:41)
 Address 0x........ expected vs actual:
 Expected: stack array "a" of size 56 in frame 2 back from here
 Actual:   unknown
 Actual:   is 0 after Expected

Invalid write of size 8
   at 0x........: main (stackerr.c:44)
 Address 0x........ expected vs actual:
 Expected: stack array "a" of size 56 in this frame
 Actual:   unknown
 Actual:   is 0 after Expected

Invalid write of size 1
   at 0x........: _IO_default_xsputn (in /...libc...)
   by 0x........: ...
   by 0x........: ...
 Address 0x........ expected vs actual:
 Expected: stack array "buf" of size 8 in frame 4 back from here
 Actual:   unknown
 Actual:   is 0 after Expected


ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 0 from 0)