ALAssetRepresentation methods cause crashes

Originator:sshrpe
Number:rdar://9728659 Date Originated:06-Jul-2011 11:34 AM
Status:Duplicate/9609057 Resolved:Yes
Product:iPhone SDK Product Version:iOS5 beta 2
Classification:Performance Reproducible:Always
 
NB: Fixed in iOS5b3

Summary:
A number of methods in the ALAssetRepresentation class cause hangs and crashes.

Steps to Reproduce:
Obtain an instance of ALAsset through either ALAssetsGroup's -enumerateAssetsUsingBlock: method or ALAssetsLibrary's -assetForURL:resultBlock:failureBlock: method. Obtain an ALAssetRepresentation instance using -defaultRepresentation. Send messages to the ALAssetRepresentation method.

Expected Results:
fullScreenImage - a CGImage representation of the asset is returned at the resolution of the screen.
fullResolutionImage - a CGImage representation of the asset is returned at the original resolution of the asset.
size - the size of the asset's data is returned.
metadata - an NSDictionary is returned containing the Asset's EXIF and other data.

Actual Results:
fullScreenImage - after a hang (normally approx 1-2s), a blank CGImage is returned.
fullResolutionImage - app crashes with EXC_BAD_ACCESS.
size - app crashes with EXC_BAD_ACCESS.
metadata - app crashes with EXC_BAD_ACCESS.

Regression:
All methods work as expected in iOS 4.3

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