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Won't Fix
Votes
0
Found in [Package]
2019.3
2019.3.0f3
2020.1
Issue ID
1207481
Regression
No
"Assertion failed on expression" errors when using IMGUIContainer from "UIElements Runtime" package to create a window
Using IMGUIContainer to create a window (with GUILayout.Window()), causes multiple assert failed messages:
Assertion failed on expression: '!dest.m_MultiFrameGUIState.m_Windows'
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
How to reproduce:
1. Open the attached project
2. Enter the Play mode
3. Notice the Assertion errors in the Console
Expected result: No "assertion failed on exception" errors are thrown.
Actual result: Multiple "assertion failed on exception" errors are thrown.
Reproducible with - 2019.3.0f4, 2020.1.0a18
Note:
* Not tested with Unity versions prior 2019.3, since "UIElements Runtime" package was introduced in 2019.3
* Reproducible with both "UIElements Runtime" v0.0.2 and v0.0.3
* Could not check if regression due to package console errors.
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Resolution Note:
We will not support IMGUIContainer in the Runtime.
Right now this is allowed without any error message and nothing will be functional.
We have added a task to give a clean error message to the user or find a way to move IMGUIContainer to a different assembly.