Steps to reproduce: 1. Open the attached test case 2. Try to drag the text Results: crash. Tried with 2.0.1 and ToT. I do not know if the test case is correct code, but anyway, it shouldn't crash :)
Created attachment 3947 [details] test case
Created attachment 3948 [details] crash log
Found a simple fix.
Created attachment 4281 [details] add the missing type check
Comment on attachment 4281 [details] add the missing type check r=me