QtCreator after start opens main window and after second it crashes

[PetQter]

Hello,
I have qtcreator 5.0.3., XFCE4, NetBSD 10.1
It was running properly several weeks and after hard rebooting machine I have this problem. It starts, opens main window, windows is opened maybe 1 second and after it qtcreator crashes.
It leaves some files and directories in /tmp. Deleting of them and rebooting does not help.

I tried to start it under gdb and result is:

(gdb) r
Starting program: /usr/pkg/bin/qtcreator 
[New LWP 798 of process 797]
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-programmer'
[New LWP 2335 of process 797]
[New LWP 1824 of process 797]
[New LWP 1825 of process 797]
[LWP 1825 of process 797 exited]
[New LWP 1827 of process 797]
[New process 797]
[New LWP 2086 of process 797]
[New process 797]
QProcess: Destroyed while process ("/usr/bin/gcc") is still running.
QProcess: Destroyed while process ("/usr/bin/g++") is still running.
QProcess: Destroyed while process ("/usr/bin/g++") is still running.
SOFT ASSERT: "false && "__cplusplus is not predefined, assuming latest C++ we support."" in file toolchain.cpp, line 443

Thread 9 received signal SIGPIPE, Broken pipe.
[Switching to process 797]
0x00007dfce224745a in poll () from /usr/lib/libc.so.12

and ps output:

programmer 1259  0.0  0.0   20568   2140 pts/0 Is   10:44AM 0:00.01 |       | |-- sh 
programmer  792  0.0  2.2  352960 276204 pts/0 Sl   10:45AM 0:07.35 |       | | `-- gdb qtcreator 
programmer  797  0.0  0.9  666536 113656 pts/0 SXl+ 10:45AM 0:03.78 |       | |   `-- /usr/pkg/bin/qtcreator 
programmer  881  0.0  0.0       0      0 pts/0 Z+         - 0:00.00 |       | |     |-- (g++)
programmer 1280  0.0  0.0       0      0 pts/0 Z+         - 0:00.00 |       | |     |-- (g++)
programmer 1826  0.0  0.4  411344  49808 pts/0 S+   10:45AM 0:00.49 |       | |     `-- /usr/pkg/libexec/qtcreator/clangbackend /tmp/QtCreator-dMcqEI/ClangBack
programmer 2091  0.0  0.0   20556   2132 pts/1 Ss   10:44AM 0:00.01 |       | `-- sh 

I have two questions:

1. What to try to correct it ?
2. Can you please explain what is this feature when qtcreator tries to build automatically something immediately after start ? In previous crashes I saw git process there, so qtcreator tries to download something from git and build it on background. What is this feature for ?

Peter

[jsulm]

@PetQter You could try to delete or rename QtCtreator config folder. Not sure where it is on NetBSD, on Linux it is: ~/.config/QtProject

[PetQter]

@jsulm Thanks, it helped and I found that exactly QtProject.db was only problem.

Still I have second question, what is feature for when qtcreator compiles something after start on background ? Is is activity of some plugin ?

Peter

[jsulm]

@PetQter I don't know. Maybe QtCreator just checks the compilers configured in the selected Kit.
One question: does QtCreator automatically load last project if you start it?

[aha_1980]

@PetQter

Can you please explain what is this feature when qtcreator tries to build automatically something immediately after start ? In previous crashes I saw git process there, so qtcreator tries to download something from git and build it on background. What is this feature for ?

This is most likely not the case. As @jsulm already said, Creator needs to check the tools it is using, and the compiler and git are tools it is using.

Regards