`--> gcc -c cra.i
cra.i:40:5: error: unknown field ‘dog’ specified in initializer
     .dog = 0x00000000,


`--> ~/build/bin/clang-4.0 -c cra.i
cra.i:40:6: error: field designator 'dog' does not refer to any field in type 'struct_0'
    .dog = 0x00000000,
     ^
warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
1 warning and 1 error generated.