emberjs/ember.js — pull request #570 by azer (2012-03-08 01:58:11+00:00)
Title: Allow setting breakpoints in the error-throwing line of ember_assert

When ember_assert throws an error, I need to see stacktrace to identify the error. This commit splits the single line if statement to 3 lines and lets developers set a breakpoint to the line that throws the errors.