[dmd-internals] broken test runs

[Brad Roberts]

One of the little flurry of commits a few minutes ago seems to have broken every platform (at least every one that's
completed a run so far):

Test failed.  The logged output:
../src/dmd -m32 -Icompilable   -odtest_results/compilable -oftest_results/compilable/testexpression_0.o -c
compilable/testexpression.d
Internal error: backend/cgcs.c 214


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Test failed: expected rc == 0, exited with rc == 1

make[1]: *** [test_results/compilable/testexpression.d.out] Error 1