What version are you running? RBTools 0.6.3 alpha 0 (dev) What's the URL of the page containing the problem? N/A What steps will reproduce the problem? 1. Create an empty hg repository 2. Clone that repository 3. Commit a change 4. Run `rbt diff` What is the expected output? What do you see instead? The expected output is the diff (i.e., the contents of a change). The current output is: CRITICAL: list index out of range What operating system are you using? What browser? OS X. N/A Please provide any additional information below.