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When running Bacon on a suite with failing tests from TextMate [or Xcode] with Ruby 1.9 (MacRuby), I get:
core:in `write:': not opened for writing (IOError)
Oddly, I don't get this if I run it from the command-line with MacRuby, or use MRI Ruby 1.8.
I don't know if this occurs with other Ruby 1.9 implementations...
This seems to be a textmate setup issue. If it's a bacon issue, where's the stacktrace?