Bug 58448 - IDE0006 warning on File -> New CrossPlatform App
Summary: IDE0006 warning on File -> New CrossPlatform App
Status: VERIFIED FIXED
Alias: None
Product: Android
Classification: Xamarin
Component: MSBuild ()
Version: 8.0 (15.4)
Hardware: PC Windows
: --- major
Target Milestone: 15.4 SR2
Assignee: dean.ellis
URL:
Depends on:
Blocks:
 
Reported: 2017-07-28 03:29 UTC by Pierce Boggan [MSFT]
Modified: 2017-10-31 23:23 UTC (History)
8 users (show)

Tags: ac
Is this bug a regression?: No
Last known good build:

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Status:
VERIFIED FIXED

Description Pierce Boggan [MSFT] 2017-07-28 03:29:29 UTC
# Steps to Reproduce
1. File -> New -> Cross-Platform -> Cross-Platform App.

# Expected Behavior
Templates unfold correctly, projects are loaded successfully, and there are no (or minimal) errors and warnings.

# Actual Behavior
An IDE0006 error is thrown while loading the project. Here is the exact error message:
Warning	IDE0006	Error encountered while loading the project. Some project features, such as full solution analysis for the failed project and projects that depend on it, have been disabled.	App4.Android		1	Active	To see what caused the issue, please try below.

1. Close Visual Studio
2. Open a Visual Studio Developer Command Prompt
3. Set environment variable “TraceDesignTime” to true (set TraceDesignTime=true)
4. Delete .vs directory/.suo file
5. Restart VS from the command prompt you set the environment varaible (devenv)
6. Open the solution
7. Check 'C:\Users\piboggan\AppData\Local\Temp\\App4.Android_*.designtime.log' and look for the failed tasks (FAILED)

I tried to grab the designtime logs as stated in the instructions, but after running through them was unable to generate a designtime.log.

# Environment Information
This is on a fresh install on a machine that hasn't had Visual Studio or Xamarin installed before.

Environment Information: https://gist.github.com/pierceboggan/b19b77773aba683649587ceed6f794ac
Screenshot: https://www.screencast.com/t/5ZrkaXwh7
Logs: Attached.
Comment 2 dean.ellis 2017-08-10 10:15:25 UTC
PR up https://github.com/xamarin/xamarin-android/pull/730
Comment 3 dean.ellis 2017-08-11 13:01:42 UTC
Should be fixed in xamarin-android/master/e5c5a824
Comment 4 Brendan Zagaeski (Xamarin Team, assistant) 2017-10-26 03:14:11 UTC
The fix for this bug was not complete as of Comment 3.  For example, in the master branch as of the time of Comment 2 and Comment 3, the `GetAdditionalResourcesFromAssemblies` task would still fail _later_ in the design-time build process.

These later failures were addressed in https://github.com/xamarin/xamarin-android/pull/889.  That change was merged to the master branch in xamarin-android/master/87411b5 and picked onto the d15-5 branch in xamarin-android/d15-5/437144a.  But the change is _not_ present on the d15-4 branch:

- The change is _missing_ in Xamarin.Android 8.0.0.33 (d15-4), so the warning from Comment 0 still occurs with that version.

- The change is _present_ in Xamarin.Android 8.1.0.21 (d15-5), and the warning does _not_ occur with that version.

- By chance, this issue will also be resolved for the precise scenario described in Comment 0 in the _next_ release from the d15-4 branch.  The reason is that https://github.com/xamarin/xamarin-android/pull/952 (the partial reversion of https://github.com/xamarin/xamarin-android/pull/709 to stop Bug 60080 in the d15-4 branch) disabled the `GetAdditionalResourcesFromAssemblies` task entirely during design-time builds, and that is sufficient to stop the issue for the particular new project scenario described in Comment 0.  (That said, d15-4 does _not_ contain the change to the `Aapt` task from xamarin-android/pull/889, so there might still be scenarios on d15-4 where the `Aapt` task will cause this warning.)




## Follow-up topics

The current approach from xamarin-android/pull/730 and xamarin-android/pull/889 of adding `ContinueOnError` attributes to certain Tasks _improves_ the user experience for this bug because it allows IntelliSense to behave as expected, and it stops the _exact_ warning described in Comment 0, _but_ it still leaves behind some confusing warnings in the error list.

I have added follow-up questions about the remaining warnings in Bug 50914, Comment 9 because that bug contains additional background context about those warnings.
Comment 5 Brendan Zagaeski (Xamarin Team, assistant) 2017-10-31 23:23:49 UTC
## Verification status: verified in Xamarin.Android 8.0.2

> GOOD: Visual Studio 2017 version 15.4.2, Xamarin.Android SDK 8.0.2.1  (HEAD/c2a33d8ea)
> BAD:  Visual Studio 2017 version 15.4.1, Xamarin.Android SDK 8.0.0.33 (HEAD/7a6a056e8)



## Steps followed to test

1. Create a new "Visual C# > Cross Platform App (Xamarin) > Blank App, Xamarin.Forms, Portable Class Library (PCL)" project.

2. Wait for the project to load completely.

3. Open "View > Error List". (Optionally, set the drop-down menu in the Error List window to "Build + IntelliSense" to show as much information as possible.)




## GOOD Results with Visual Studio 2017 version 15.4.2, Xamarin.Android SDK 8.0.2.1

The Error List contains _no_ "IDE0006 Error encountered while loading the project" warnings. (One other familiar old warning still appears for the Android project, but as mentioned in Comment 4 the follow-up discussion for that can be handled in Bug 50914.)




## BAD Results with Visual Studio 2017 version 15.4.1, Xamarin.Android SDK 8.0.0.33

The Error List _does_ contain a "IDE0006 Error encountered while loading the project" warning.




## Additional testing environment info

Android SDK Tools          25.2.5
Android SDK Platform-tools 25.0.5
Android SDK Build-tools    25.0.3

Android 8.0.0 (API 26) SDK Platform
Android 7.1.1 (API 25) SDK Platform

Java JDK 8u131 (1.8.0_131), 64-bit

Windows 10 Version 1703, 64-bit
US English locale, US Eastern time zone
User name: Windows User