Bug 4426 - Quartz sample throws NRE when switching from Blending to another view on device
Summary: Quartz sample throws NRE when switching from Blending to another view on device
Alias: None
Product: iOS
Classification: Xamarin
Component: General ()
Version: 5.3.x
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Rolf Bjarne Kvinge [MSFT]
Depends on:
Reported: 2012-04-13 13:03 UTC by PJ
Modified: 2012-04-21 03:36 UTC (History)
4 users (show)

Is this bug a regression?: ---
Last known good build:

screenshot (154.00 KB, image/png)
2012-04-13 20:09 UTC, Sebastien Pouliot

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Description PJ 2012-04-13 13:03:26 UTC
Steps to reproduce:
1 Debug Quartz sample on iOS device
2 Select [Blending]
3 Select <MonoTouch Quartz Demo] to return to the list of features
4 Select another menu item.

Expected behavior:
Other feature should open

Actual behavior:
Crash: https://gist.github.com/2378311

This issue occurs on Release and Debug.
This issue only occurs on device (not simulator)

Found on:
MT 5.3.3
Mono 2.10.9

iPad2 (iOS 5.1)
Comment 1 Sebastien Pouliot 2012-04-13 19:29:49 UTC
This also happens (on an iPod Touch 4th gen) when the linker is disabled.
Comment 2 Sebastien Pouliot 2012-04-13 20:09:52 UTC
Created attachment 1667 [details]

It could be a registration bug* since the crash occurs in a method of another type. See screenshot -> that's the wrong `ViewDidLoad`

Also I get weird results (I do not see the picker) if I use another items first (before trying Blending).

* That also differs from simulator and devices.
Comment 3 Rolf Bjarne Kvinge [MSFT] 2012-04-17 19:36:29 UTC
Fixed in master (0c4a1662). Unit tests included.

It's only a regression in master, so nothing has been backported to 5.2.
Comment 4 Rolf Bjarne Kvinge [MSFT] 2012-04-21 03:36:25 UTC
*** Bug 4574 has been marked as a duplicate of this bug. ***