Bug 54172 - Error executing task GenerateResourceDesigner: Object reference not set to an instance of an object
Summary: Error executing task GenerateResourceDesigner: Object reference not set to an...
Alias: None
Product: Android
Classification: Xamarin
Component: General ()
Version: unspecified
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Jonathan Pryor
Depends on:
Reported: 2017-03-29 08:06 UTC by Przemysław Raciborski
Modified: 2017-08-23 21:14 UTC (History)
4 users (show)

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

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Description Przemysław Raciborski 2017-03-29 08:06:26 UTC
Project fails to build due to:
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets: Error: Error executing task GenerateResourceDesigner: Object reference not set to an instance of an object (MvvmCross.Plugins.Notifications.Samples.Droid)

Reproduction project:
https://github.com/thefex/MvvmCross.Plugins.Notifications/commit/2b7835e27d6afafe141c71e393f13aca98582809 <- get project from this commit and try to build / run Samples/Droid/MvvmCross.Plugins.Notifications.Samples.Droid

Project fail to build both current stable, current beta, Visual Studio or Xamarin Studio. Resources are never updated! (i managed to build and run it but due to invalid resources project crashed on runtime)

Detailed error:
1>C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(1304,2): error MSB4018: System.NullReferenceException: Object reference not set to an instance of an object.
1>C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(1304,2): error MSB4018:    at Xamarin.Android.Tasks.ResourceDesignerImportGenerator.CreateImportMethods(IEnumerable`1 libraries)
1>C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(1304,2): error MSB4018:    at Xamarin.Android.Tasks.GenerateResourceDesigner.Execute()
1>C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(1304,2): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
1>C:\Program Files (x86)\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(1304,2): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()
Comment 1 Prashant [MSFT] 2017-07-05 09:09:54 UTC
Thank you for taking the time to submit the bug. We are unable to reproduce this issue. Please attach a reproduction to the bug by starting with a clean Xamarin.Android project and adding just the code necessary to demonstrate the issue.
Comment 3 Cody Beyer (MSFT) 2017-08-23 21:14:05 UTC
Because we have not received a reply to our request for more information we are closing this issue. If you are still encountering this issue, please reopen the ticket with the requested information. Thanks!