Alex Crichton 0015cab1fd Test fixes and rebase conflicts
This commit switches over the backtrace infrastructure from piggy-backing off
the RUST_LOG environment variable to using the RUST_BACKTRACE environment
variable (logging is now disabled in libstd).
2014-03-15 22:56:46 -07:00
..
2014-03-15 22:56:46 -07:00
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