Tdesktop: Constant crashes on MacOS after latest 10.14.4 update

[kalieye]

Steps to reproduce

1. open telegram
2. use it/leave it on the background
3. boom goes the dynamite

Expected behaviour

Didn't crash until the latest MacOS update

Actual behaviour

Crashes every few minutes

Configuration

Operating system: MacOS 10.14.4 (Mojave)

Version of Telegram Desktop: 1.6.3 (latest App Store version)

Used theme: Midnight

Logs:

Insert log.txt here (if necessary)

i can't seem to find any logs either inside the contaier or in the crashlogs of osx, any suggestions on where to get them?

[bklebe]

Same here. Not quite every few minutes, but probably at least a dozen times a day.

[mik9]

It crashes after OS switches between integrated and discrete GPU which happens quite often when using browser. MacBook Pro (Retina, 15-inch, Mid 2015).

[john-preston]

@mik9 Yes, it looks like that. I did have a crash on an external display connection. I'll test more today.

[john-preston]

@all

This is a Qt crash that is caused (I think) by Apple bug being added in OpenGL support in macOS 10.14.4.

I could reproduce the crash. As I understand it happens in all Qt versions, at least here is Qt Creator crash report with the same stacktrace:

https://bugreports.qt.io/browse/QTCREATORBUG-22215

Qt team is investigating it and I hope they'll come up with a workaround. Maybe it can be reported to Apple as well, but I wouldn't count on Apple fixing it, they've deprecated OpenGL completely in macOS 10.14 and I'm afraid their priority for the bug will be low.

[john-preston]

I can confirm that this is not a Qt bug, but macOS 10.14.4 bug in any OpenGL application.

Here I've attached a simplest OpenGL program in pure Objective-C. If you compile it in Xcode 10.2 and run on macOS 10.14.4 with two GPUs (integrated and discrete) it will crash if the laptop will switch from one to another.

TestOpenGL.zip

[john-preston]

I've submitted a bug report to Apple.