NSInternalInconsistencyException on systemLayoutSizeFittingSize

Originator:migrantp
Number:rdar://14520418 Date Originated:23 July 2013
Status:Closed Resolved:Yes
Product:iOS SDK Product Version:7.0
Classification:Crash Reproducible:Always
 
Summary: Dequeuing a UITableViewCell and calling systemLayoutSizeFittingSize can cause a NSInternalInconsistencyException on iOS 7, that does not happen on iOS 6.

Steps to Reproduce:
- The goal of the code is to create a table view cell that can expand vertically based on its content.
- Create a UITableViewController with a custom cell that has a label in it.
- Set constraints on the label such that its height is not fixed, but depends on the cell's height.
- In viewDidLoad:
  - Dequeue a cell.
  - Set the label's text.
  - Add a width constraint to the cell so it matches the table view's width.
  - Call systemLayoutSizeFittingSize:UILayoutFittingExpandedSize on the cell.

Expected Results: A CGSize is returned with the result.

Actual Results: A NSInternalInconsistencyException is generated with the reason 'Invalid parameter not satisfying: isfinite(c)' 

Regression: The problem occurs on iOS 7 beta, regardless of whether the app is built with Xcode 4 or Xcode 5. The problem does not occur on iOS 6.

Notes: Sample project that exhibits the crash is attached.

Comments

This is now fixed in iOS 7 beta 4 (11A4435d).

By migrantp at July 30, 2013, 12:45 p.m. (reply...)

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