Deleting first measure of score in part with key signature crashes
This affects 2.0.3 and the current master.
1. Open attached score
2. Go to "Flöte"-Part
3. Select the multi measure rest (first three measures)
4. Edit -> Measure -> Delete Selected Measures
Tested on Ubuntu and Mac.
Analysis: The crash happens in file edit.cpp line 2174.
EDIT: Forgot to attach the file...