/tmp/df3762.c: In function 'main':
/tmp/df3762.c:69:2: warning: 'data' is used uninitialized in this function [-Wuninitialized]
  printf("branch observed data: 0x%04x\n", observed);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
BUILD-OK
read_reg wrote *data: NO (failed)
branch observed data: 0x0000
decision on UNINITIALIZED data: loopback-check branched on 0x0000
DEFECT CONFIRMED (logic replication; hardware path requires e1000 NIC)
exit=1