--enable-debug enables debugging for src/test, causing rpass/conditional-debug-macro-off to fail.

[huonw]

error: test run failed!
command: x86_64-unknown-linux-gnu/test/run-pass/conditional-debug-macro-off.stage2-x86_64-unknown-linux-gnu 
stdout:
------------------------------------------

------------------------------------------
stderr:
------------------------------------------
rust: task failed at 'explicit failure', /home/huon/rust/src/test/run-pass/conditional-debug-macro-off.rs:16
rust: domain main @0xc6d230 root task failed

------------------------------------------

rust: task failed at 'explicit failure', /home/huon/rust/src/compiletest/runtest.rs:723
test [run-pass] run-pass/conditional-debug-macro-off.rs ... FAILED

All of the old debug! statements have been converted to info!, so tests should be able to choose --cfg debug or not themselves, as the info! statements are unconditionally in the output.

cc @graydon

[pnkfelix]

Got clarification from huonw about this bug: the test runner is currently deciding, based on the build configure flag --enable-debug, whether to pass --cfg debug or not to the tests; huonw is suggesting that the test runner should not make that decision based on the build configure state, but rather based on meta-data in the test itself.