Xcode playground with documentation crash on edit on single swift code

Originator:cescofry
Number:rdar://18336297 Date Originated:15/09/2014
Status:Open Resolved:
Product:Xcode Product Version:6
Classification:Crash Reproducible:Always
 
Summary:
In a playground with documentation (part swift code, part html) if there is a single swift part of code Xcode will crash if try to modify on the last line of the code.

Steps to Reproduce:
1) Open a playground with only a single snippet of code (example attached)
2) focus on the last line of the code snippet
3) start to enter characters

Expected Results:
characters to appear on the screen

Actual Results:
Xcode crashes (see log)

Version:
Xcode 6 Beta 7 / GM / 6.1 Beta 1

Notes:
In the crash log there is a reference to an array out of bounds at position 124. 124 is the text length of the swift code.

Configuration:
Macbook Pro / Macbook Air / Mac Mini

Attachments:
'playground_crash.log', 'Screen Shot 2014-09-15 at 14.17.26.png' and 'README.playground.zip' were successfully uploaded.

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