Possible ideas for a possible new FET-6 version

[Liviu Lalescu]

Hello, ghani 

Please confirm:

1) My precompiled GNU/Linux executable, not compiled by you. Please go to Help/About Qt and tell me the Qt version.

2) When you begin generation multiple, it crashes at start? After less than 1 second? After 1-5 seconds?

[ghani1990]

Hello, ghani 

Please confirm:

1) My precompiled GNU/Linux executable, not compiled by you. Please go to Help/About Qt and tell me the Qt version.

2) When you begin generation multiple, it crashes at start? After less than 1 second? After 1-5 seconds?

1- yes it yours, Qt version 5.15.2.
2- The behavior is different every time, generally it crash immediately, or in 3 seconds in total.

[Liviu Lalescu]

Hello dear sir @Liviu Lalescu
It is a great honor for me to see you again as you make this mighty extraordinary feat.
I just noticed, while working on the new version, a problem using multiple threads, on a Linux system, as the app sometimes stops with the appearance of a message: "segmentation fault (core dumped)  ./fet"
And sometimes it works normally on the same file and the same options.

I confirm the bug, on a laptop with openSUSE 

The only advice I can give you: compile with Qt 6.0.3.

I'll try to isolate the bug, but it is very hard.

[ghani1990]

Really, it's a tough issue, can you confirm that it does not exist with version 6?
Well, I will try to build the new version with QT 6.
What if you release the new version, with QT 6? Can't you??

[Liviu Lalescu]

I isolated some random seeds which crash on my computer with Qt 5, but I never crashed with Qt 6.

I cannot release with Qt 6, because linuxdeployqt only works with Qt 5.

Also, I need to take care of this very ugly bug. It must work on any Qt.

[Liviu Lalescu]

I would like to tell you that I would like you to wait for a possible fix from me, so that you can test it.

[ghani1990]

Well, I am waiting for the solution, and I will test all versions until we get a good result.
I'm very grateful to you for all your help and for the wonderful work you are doing, my friend

[Liviu Lalescu]

Working on it... bug isolated, see attached screenshot for my work. Bug maybe in generate.cpp, line 6811.

[ghani1990]

 
I am sure that the solution will be very soon, with your insistence.
Waiting for that.

[Liviu Lalescu]

It seems that it is a Qt-5 problem, from Qt-5.14.0 to Qt-5.15.2.

I will investigate further the Qt code, but I think I cannot make a hack to fix FET behavior on Qt 5.14.0 to Qt-5.15.2.

I could compile for you with Qt-5.12.10, if you really need, but I would advise you to get Qt-6 and compile, it is not difficult at all. Please let me know. I can help you in both variants, either way you choose.

[ghani1990]

Please, Don't tire yourself out, my friend.
I will build it on manjaro with Qt ​6 and tell you the result.

[Liviu Lalescu]

Install gcc and g++ (or gcc-c++), I have 10.3.0, but maybe you can only install older.

Make a Qt account (free), use the online installer, install Qt 6.0.3 gcc 64-bit. qt.io is the site, you need to dig a bit for the link. Let me know if you need help.

"~/Qt/6.0.3/gcc_64/bin/qmake", then "time make -j 4" (time if you want to know how long it compiled).

[Liviu Lalescu]

I tried something and it seems I found a solution even for Qt 5.15.2. I hope you can help me with testing. I will try to put a test version for you soon.

[Liviu Lalescu]

Dear ghani,

I hope I found the best solution. I have put a snapshot for GNU/Linux exe: https://lalescu.ro/liviu/Backup-fet/fet-6.0.2-snapshot-23-apr-2021-00_01-gnu-linux-executable.tar.bz2  (the best is to go to https://lalescu.ro/liviu/Backup-fet/  and get the one named with "GNU/Linux exe", I might change something)

Please let me know if this version is OK and does not crash anymore. It is very important.

Thank you for your help!

[ghani1990]

Sorry for the delay due to my internet speed, and also my old computer. It took a full hour and three minutes to build.
I can confirm that the problem disappeared in the version that I built on Qt 6.
I will try the new version that you uploaded and tell you the result.