Steps to reproduce the crash on iOS7:

• start ui-tests-app,
• run 'wrap' test page,
• tap on button 'p' to set wrap layout paddings,
• tap on button 'm' to set its margins.

or

• start ui-tests-app,
• run 'wrap' test page,
• tap on button 'all',
• tap on button 'n',
• tap on button 'v'.

Error:
info: [IOS_SYSLOG_ROW ] Jun 26 13:03:02 vchimevmac.local TestApp[28211] : *** Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [20 nan]'

Steps to reproduce the crash on iOS8:

• start ui-tests-app,
• run 'wrap' test page,
• tap on button 'o' to set vertical orientation of the wrap layout,
• tap on button 'all' to set all view properties,
• tap on button 'i' to set itemWidth and itemHeight properties of the wrap layout,
• tap on button 'v' to set visibility equal to visible for the collapsed button.

Error:
info: [IOS_SYSLOG_ROW ] Jun 26 12:58:22 vchimevmac.local TestApp[28069]: *** Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan 35]'