Black box sources before deciding whether to stage them for later addition (bug 1038117). r=fitzgen

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extra : rebase_source : dfedcab97b91ae75c9ef5c63d4e1489a49576330
Properly handle terminated scripts in the debugger (bug 814683). r=fitzgen

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extra : rebase_source : 7df6a8e87642d40bf69e50d65aa0b358a5f1955b