[TIMOB-26141] Android: Accessing Titanium.App.Android.R logs GC errors

GitHub Issue	n/a
Type	Bug
Priority	Critical
Status	Closed
Resolution	Fixed
Resolution Date	2018-10-29T22:22:06.000+0000
Affected Version/s	n/a
Fix Version/s	Release 7.5.0
Components	Android
Labels	alloy, android
Reporter	David van de Meer
Assignee	Gary Mathews
Created	2018-06-06T03:54:59.000+0000
Updated	2018-10-29T22:22:09.000+0000

Description

When building an Alloy app with Ti SDK 7.1.1 accessing Titanium.App.Android.R causes the logs to trow errors:

[ERROR] JavaObject: !!! OH NO! We tried to grab a Java Object back out of the reference table, but it must have been GC'd, because it's null! Key: 0
[ERROR] JavaObject: !!! OH NO! We tried to grab a Java Object back out of the reference table, but it must have been GC'd, because it's null! Key: 0

How to reproduce: 1. Create new Alloy app 2. Add the following code below in alloy.js: 3. Build 4. See errors in logs.

Ti.API.info("Hyper Hello");
Ti.API.info(Titanium.App.Android.R);

Logs:

[INFO]  Hyper Hello
[ERROR] JavaObject: !!! OH NO! We tried to grab a Java Object back out of the reference table, but it must have been GC'd, because it's null! Key: 0
[ERROR] JavaObject: !!! OH NO! We tried to grab a Java Object back out of the reference table, but it must have been GC'd, because it's null! Key: 0
[INFO]  [object R]

Comments

Sharif AbuDarda 2018-06-08

Hello, we can reproduce the issue, At the moment, we don't know why it's happening but seems harmless at the moment. It doesn't break the app or cause a crash. Thanks.
David van de Meer 2018-06-18

Why would you mark this as resolved? Yes its not causing issues but its not "Resolved"
Hans Knöchel 2018-06-20

This is indeed a valid issue and should be looked into. It may be an issue with our V8 binding (cc [~cwilliams], [~gmathews]) and also happens for random Hyperloop examples (using the hyperloop-examples app) on SDK 7+ only.
Gary Mathews 2018-06-22

master: https://github.com/appcelerator/titanium_mobile/pull/10129

Samir Mohammed 2018-07-20

*Closing ticket*, Verified fix in SDK Version: 7.4.0.v20180718223310 *FR Passed (Test Steps):*

Created a titanium application with the following code

   Ti.API.info("Hyper Hello");
   console.log(Ti.App.Android.R);

Ran the program

Application no longer showed a GC error

*Test Environment*

   APPC Studio: 5.0.0.201712081732
   APPC CLI: 7.0.4
   Nexus 6p Emulator (8.0)
   Operating System Name: Mac OS High Sierra
   Operating System Version: 10.13
   Node.js Version: 8.9.1
   Xcode 9.2

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