1// RUN: not llvm-mc -triple x86_64-apple-darwin10 %s -filetype=obj -o %t.o 2> %t.err
2// RUN: FileCheck < %t.err %s
3
4        .data
5t0_a:
6t0_x = t0_a - t0_b
7// CHECK: unable to evaluate offset to undefined symbol 't0_b'
8	.long	t0_x
9