[solved] QSerialPortInfo::availablePorts() crashing on osx
-
Yea you're right, I had the problem again with Qt 5.2 on my mac.
What I believe is the problem was the ICU library. Since I had built Qt 5.2 from scratch whereas the Qt 5.1.1 I had used the pre-built version.
I updated my ICU library (also built from scratch) and rebuilt Qt 5.2 against that and the problem was finally resolved.
I can't guarantee that it was an ICU issue but the changing of ICU to 52 (was using 48) seems to have resolved the issue.
If your ICU library is self built I would try upgrading to 52 as well and rebuild your Qt. Alternately I haven't had a problem with this bug and the prebuilt Qt libraries so you can always use those until you can get your build issue worked out.
Sorry I never updated this thread with my new findings. :)
-
Thank you for your reply.
I haven't ever seen ICU library, which packages it could be provided with on my system? And what dependencies does it have with Qt? -
It is an internationalization package. Qt is dependent on it for QtWebKit. If you don't use or haven't compiled in QtWebKit you won't need it.
I don't think it is installed by default with windows, I could be wrong though I don't use windows much.
You can find more about it and download at:
It may not have been ICU changes that fixed my problem. It could have been the rebuild of the source. If you are using pre-compiled Qt or Qt Creator and you are seeing this problem I would look deeper in your code as it may not be the same thing I was experiencing. I never experienced this on windows or linux, only osx.
-
I read about icu and scan my system. There is no icu files or libs in my Qt sources. I don't use QtWebKit. There is no any evidence that basic example QtSerialPort application that doesn't use any additional Qt modules could crash because of one of QtWebKit dependencies.
I don't use pre-compiled Qt, I built Qt from sources using vs2010 command prompt and jom. -
@#include <QtSerialPort/QSerialPortInfo>
int main(int argc, char *argv[])
{
QSerialPortInfo::availablePorts();
}@
It's enough to crash. -
Ok, not webkit or icu then for sure.
Try getting the pre-built sources and compile and test with those. There has to be something during the build that is causing that crash. I thought mine was ICU as when I changed ICU versions and rebuilt it was "fixed". However in light of your issues maybe it was something else entirely but the rebuild fixed it anyway.
-
There is no crash in release. I't is only in debug build configuration.
-
My crash happened in both debug and release.
-
Would you please describe you system configuration at
https://bugreports.qt-project.org/browse/QTBUG-36559#comment-230605,
I submited there. -
I made further step. I avoided using than function and initialized serial port with nam string:
QSerialPortInfo info("COM25");
I began sending data from my device to computer and tried to catch it.
It worked in release but in debug there wasn't any data received. -
[quote]
I began sending data from my device to computer and tried to catch it.
It worked in release but in debug there wasn’t any data received.
[/quote]Please create other task for this issue.
Are you build library (on VS2010) yourself?
-
They find a solution - I've connected release library to project not debug one in debug mode. My fault.
-
Ok. :)
-
Well that would definitely do it lol. I would probably have though of that with the debug mode only thing if it wasn't so late last night when I was answering.
Glad you got it all working. So it probably was a bad icu lib on my build.