[Xcode] 6.3b3 Mandelbrot playground crashes when underlying code is (un)commented

Originator:AustinZheng
Number:rdar://20206674 Date Originated:18-Mar-2015 10:12 AM
Status:Duplicate of 20094959 Resolved:
Product:Developer Tools Product Version:
Classification: Reproducible:Sometimes
 
Summary:
Xcode crashes when a playground is opened, one of the source files is opened, code is uncommented or commented out, and the user returns to the playground.

Steps to Reproduce:
1. Download the Mandelbrot set playground from https://developer.apple.com/swift/blog/?id=26

2. Open the playground in Xcode 6.3b3

3. Open the Navigator (cmd-1)

4. Open the MandelbrotView.swift file in 'Sources'

5. Comment or uncomment the code in ll.20-48 (under the comment "// Axes")

6. Click on the "Mandlebrot.playground" file to return to the playground

Expected Results:
No crash

Actual Results:
Xcode crashes most of the time, with the (attached) crash log data

Version:
Xcode 6.3b3 (6D543q); OS X 10.10.2

Notes:
Crash log is attached

Configuration:
Reproduced on a late 2013 retina 15" Macbook Pro, 2.6 GHz Core i7, 16 GB RAM

Attachments:
'DUMP' was successfully uploaded.

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