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By Design
Votes
0
Found in
2018.3.0a1
2018.3.3f1
Issue ID
1124760
Regression
No
[Support] Altering TimeScale on runtime will make devices unresponsive and application hangs
How to reproduce:
1. Build and run the project on an iOS device or standalone
--
Notice that the game gets frozen in the splash screen.
Versions:
2018.3.6f1
~Editor: Project launches
~Standalone build: Hangs when launching the app
~iOS build: build successful, hangs when launching the app with Xcode
2019.1.0b4:
~Editor: Couldn't enter play mode due to errors
~Standalone build: Couldn't build due to errors
~iOS: Couldn't build due to errors
2019.2.0a6:
~Editor: Couldn't enter play mode due to errors
~Standalone build: Couldn't build due to errors
~iOS: Couldn't build due to errors
Note: Removing `Time.timeScale = 5; (l21) from the script `FPSCounter.cs' Awake() method, the game runs as expected
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Resolution Note (2019.3.X):
In FPSCounter.CalculateFPS, there is the following code:
private IEnumerator CalculateFPS()
{
WaitForSeconds waitDelay = new WaitForSeconds(FREQUENCY);
while (true)
{
if (Time.timeScale == 1)
{
yield return waitDelay;
/.../
}
}
}
Now, if Time.timeScale is not 1, this while(true) loop never returns, and you have an endless loop, freezing the game.
Now, I'ms somewhat surprised that this bug (with a 7GB repro project) went all the way to a Unity developer without anyone apparently trying to attach a debugger to see what is going on before ¯\_(ツ)_/¯