NSAttributedString will hang on certain types of data when init'ing from a web archive

Originator:scott.j.little
Number:rdar://17958771 Date Originated:08-Aug-2014 03:27 PM
Status:Open Resolved:
Product:OS X SDK Product Version:10.9.4 13E28
Classification:Serious Bug Reproducible:Always
 
Summary:
Certain web archive data (in my experience they have all come from emails, but that is because of where I use webkit) cause -[NSAttributedString initWithData:options:documentAttributes:error:] to hang for 1 minute, bringing up a beach ball for the entire app.

Steps to Reproduce:
Unzip and run the attached project.

Expected Results:
Whether or not the method is able to correctly interpret the file (which in this case it is not able), the method should return more quickly, or at least not block the entire application for a whole minute.

Actual Results:
The entire application is blocked for 60 seconds and in the end an error is returned saying “The file couldn’t be opened because it isn’t in the correct format”

Regression:


Notes:
The example data is extracted directly from the WebFrame and was stored into a file in the project.
The original email message that this data came from is also included in the project for reference.

You can download the sample project to reproduce the bug here:

http://media.littleknownsoftware.com/untitled%20folder/AttributedStringBug.zip

Comments


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