Solved Segmentation fault while open a text file
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Hi,
To add to my fellow, you're checking the availability of the document before calling clear but then you don't care about that anymore and call the next function anyway.
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@HenrikSt. One more note: why do you pass this to QFile()?
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@JohanSolo I debug that
@SGaist What do you mean? How can I fix that? The thing is, it worked before I changed the kits from mscv2015 to msgw32 bit... -
I googled this error message and somehow told that this error has nothing to do with Qt. It's a general Windows Problem, so that the error comes too while open a file into Notepad. Is it right?
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@HenrikSt. What @SGaist means is:
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) { qDebug() << "Fehler beim Öffnen der Datei"; }
If you cannot open the file you just continue and try to read its content later. Shouldn't you add a return there?
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) { qDebug() << "Fehler beim Öffnen der Datei"; return; }
Also: why do you set a parent in your QFile?
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@HenrikSt. said in Segmentation fault while open a text file:
changed the kits from mscv2015 to msgw32 bit
Did you rerun qmake and did a rebuild after changing the kit?
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@HenrikSt. said in Segmentation fault while open a text file:
shell\comdlg32\fileopensave.cpp(14382)\COMDLG32.DLL!7465AABC: (caller: 7468B0FD) ReturnHr(1) tid(da8) 80004005 Unspecified error
CallContext:[\PickerModalLoop]To add to the already given suggestions, this error doesn't seem to have anything to do with the actual opening of the file, but rather with the
QFileDialog::getOpenFileName
. Try with an alien dialog and see how that fares. -
@HenrikSt. This line does not have any effect, why do you have it?
QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation);
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I will get this error. And i removed the line @jsulm .
Here's a picture:
https://1drv.ms/i/s!AqaeHLtTIsoIhOofMu8aGwHVDcerHA -
I have tested the example "Application" which is installed with Qt.
There is the same errer while open a file, so it has nothing to do with my code!
How can i fix that? I reinstalled Qt but the error is still there...
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@HenrikSt.
What version of Qt do you have installed?
From where did you install?
What OS?
What tool chain are you using? -
What version of Qt do you have installed? 5.7
From where did you install? C: Standard path
What OS? Windows 10 insider slow ring
What tool chain are you using? I don't know actually -
@HenrikSt.
@HenrikSt. said in Segmentation fault while open a text file:
From where did you install? C: Standard path
I meant from standard online installer or from some obscure place?
Or even a self-compiled version?Tools is the compiler tool chain.
Is it MinGW or a MSVS version? -
Online installer from qt.io
MinGw
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@HenrikSt.
I guess you are using Qt creator as IDE, right?
When you create a new Application, it will crash after compilation and linking?
Goto "Tools"->"Options"->"Build&Run", check there the different tabs look out for warnings or errors.
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No, it is only crashing when I want to open a file into QTextEdit. I use the Application Example from Qt and my own written Application. Both crashes when I want to load a file :/
Yes, I am using Qt Creater IDE
Other applications are running well...
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@HenrikSt.
And what is the exact Application example which is also crashing?
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Any idea why it crashes while opening a file?
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@HenrikSt.
I have just loaded the project file C:\Qt\Examples\Qt-5.7\widgets\mainwindows\application\application.pro
as it is already on my machine. Compiled with MinGW and linked with Qt 5.7.1, all standard as from installation through online installer.
I have a win 10 64 bit running.I did a compilation as debug and release. Both I can start from inside of creator with run command.