Very slow start of QtCreator debugger under Linux. (Linux Mint 22.1/Ubuntu 24.04)

Frcs

Hello everyone,

I have an issue with a very slow-starting debugger when launching a c++ debugging sessions from within QtCreator. It takes about 30 seconds before my program launches, making repeated debugging restarts quite painful. The same program starts in less than 1 second when running gdb from my system terminal.

I tried various fixes without success, including what was suggested here:
https://forum.qt.io/topic/112648/qt-creator-debugger-very-slow/4?_=1757406648615

The only solution that worked -temporarily- was to delete ~/.config/QtProject, which is not a viable workaround. And even then, the issue came back after some time.

Any help in resolving this issues would be greatly appreciated!

My system: Linux Mint 22.01 (Based on Ubuntu 24.04)

QtCreator version:

Product: Qt Creator 13.0.0
Based on: Qt 6.4.2 (GCC 13.2.0, x86_64)

aha_1980

Hi @Frcs, I suffer from the same problem from time to time.

I'd suggest you to upgrade to Qt Creator 17.0.1 and if the problems still exist, create a bugreport at bugreports.qt.io/QTCREATORBUG (please create a link to the report from here). When you create a report, you might be requested to append the debugger log, which is at Views > Views > Debugger Log.

Regards

Frcs

Thank you for your suggestion. Unfortunately, the problem remains with QtCreator 17.

But looking at the debugger log, the issue seems to be a timeout due to a breakpoint in a header file. Moving the breakpoint to a .cpp file solves the issues.

I'll file a bug report.

aha_1980

Link to the bugreport: https://bugreports.qt.io/browse/QTCREATORBUG-33474

JonB

And for anyone reading this the bug report has already been closed with:

After further investigation, the issue could be reproduced using gdb in stand-alone mode.

It is therefore not directly related to QtCreator.