QtCreator crashed and now will not start due to segfault

TMcSquared · 9 Aug 2018, 15:51

I get a segmentation fault when I run it from the cmdline both without and with arguments.

JonB · wrote on 9 Aug 2018, 15:51

@TMcSquared
There's, oohh, a 1% chance that if you try running Qt Creator from within a debugger like Visual Studio (if you have that...), when it faults you'll get enough information from the stack trace to hazard a guess as to where it's going wrong...

TMcSquared · 9 Aug 2018, 16:54

I just debugged it and got this: Exception thrown at 0x670E5DA7 (Qt5Core.dll) in qtcreator.exe: 0xC0000005: Access violation reading location 0x7E5B8721.

aha_1980 · wrote on 9 Aug 2018, 16:54

@TMcSquared

Is it possible that the wrong Qt DLLs are loaded? Have you changed the PATH environment variable, for example?

TMcSquared · 9 Aug 2018, 16:56

Hmm I'll try adding it to the PATH xD

EDIT: that didn't work

aha_1980 · wrote on 9 Aug 2018, 16:56

@TMcSquared

No, that's not what I meant! I meant, have you done before? Or have you installed some program that did?

mranger90 · wrote on 9 Aug 2018, 17:00

Take a look at qt.conf in the creator/bin directory. If it's corrupted then plugins wont load.

TMcSquared · wrote on 9 Aug 2018, 17:12

It's not corrupted because it's a clean install

mranger90 · wrote on 9 Aug 2018, 19:08

The try wiping out the creator files under AppData\Roaming\Qtproject

TMcSquared · 9 Aug 2018, 19:28

already did that.

mrjj · wrote on 9 Aug 2018, 19:28

@TMcSquared
Best guess is that it gets wrong QtDLLs maybe via
path.

TMcSquared · 9 Aug 2018, 20:32

My PATH variable has zero Qt paths in it. even after a clean install.

mrjj · 9 Aug 2018, 20:51

@TMcSquared
I have no idea then.
last test
can you start with
qtcreator -noload Welcome -noload QmlDesigner -noload QmlProfiler
from shell and see if still crash ?

TMcSquared · M mrjj 9 Aug 2018, 20:32

:O It opened with qtcreator -noload Welcome -noload QmlDesigner -noload QmlProfiler

SGaist · wrote on 9 Aug 2018, 20:52

Hi,

Then it sounds like a graphic driver issue then. Are you sure there wasn't any modification in that regard on your machine ?

JonB · 8 Sept 2018, 20:56

@TMcSquared
You could check whether Windows Update snuck in and did anything since it last worked... :)

TMcSquared · 8 Sept 2018, 21:24

That's completely possible, thanks for your guy's help!
@SGaist I have no idea, it quit working while I was logged in.

nwoki · 19 Oct 2018, 11:24

Hi all. Sorry to revive this topic but this problem has occurred to me as well but on an application I wrote for a client. The application was running fine. Then it crashed (just like @TMcSquared ) and hasn't opened since.
My access violation is in the QtWidgets.dll module.

Any clues? (i don't have the welcome/QmlDesigner/etc modules to disable on load as does qtcreatorI)

mrjj · 19 Oct 2018, 12:06

@nwoki
Hi
Do you use QML?
if yes, could be a driver issue.

Do you have data files?
if yes, it could be damaged data files crashing app on load.

It could be client installed other app using Qt dlls and now your app finds the wrong version of Qt dll.

Buts its nearly impossible to guess on without far more concrete information :)

nwoki · 19 Oct 2018, 12:16

@mrjj said in QtCreator crashed and now will not start due to segfault:

@nwoki
Hi
Do you use QML?
if yes, could be a driver issue.

This is reproducable only on the client pc. Any way I can debug this?

Do you have data files?
if yes, it could be damaged data files crashing app on load.

Cleaned and still no dice

It could be client installed other app using Qt dlls and now your app finds the wrong version of Qt dll.

No other Qt applications are installed

Buts its nearly impossible to guess on without far more concrete information :)

Any idea on how I can help gather more info for furthur debugging?