Qt Creator launch: app not closing and/or "Press <RETURN> to close this window..." missing

massimo.cristofolini

Tested the previously attached project.

Qt Creator 4.2.2 on Windows, Qt 5.7.0 MSVC2015 32 bit:

no command argument passed (no exec() called), launched from Qt Creator: program exits with "Press <RETURN> to close this window..."
command argument passed (exec() called), launched from Qt Creator: sw locks
command argument passed (exec() called), launched from terminal: sw locks

Qt Creator 4.2.1 on Linux, Qt 5.9.1 GCC 64 bit:

no command argument passed (no exec() called), launched from Qt Creator: program exits with "Press <RETURN> to close this window..."
command argument passed (exec() called), launched from Qt Creator: sw locks
command argument passed (exec() called), launched from terminal: sw locks

Looks like you're right about the fact that one need to call quit(). I'm still quite sure about a different behavior for older Qt versions. Whatever...

Regarding the "Press <RETURN> to close this window...", with these older Qt Creator version I got the line. I'll try updating Qt Creator on a PC and see what happens.

massimo.cristofolini

I've just updated the previously mentioned Windows system with Qt Creator 4.5.0, still Qt 5.7.0 MSVC2015 32 bit (NOTE: same behavior with Qt 5.7.0 MSVC2015 64 bit).
I've lost the "Press <RETURN> to close this window..." at the end of debug.

BUT! I've just noticed that if I Run from Qt Creator instead of Start Debugging, I get the "Press <RETURN> to close this window..." line.
Looks like something related to the debugger.
Interesting thing, after updating Qt Creator I couldn't run the debugger from the IDE, and an error message informed me to reinstall "CDB Debugger Support". After reinstalling (actually, just installing; the component wasn't checked) I can run the debugger, but no "Press <RETURN> to close this window..." line.
A solution -could- be to reinstall Qt from fresh. But that's quite annoying... Also, I'm not sure it will actually fix the problem.

Any idea?

massimo.cristofolini

Back to the topic after the winter break.

I've reinstalled a fresh Qt develop environent on Windows. Awfully, the behavior is still the same. With MSVC compiler (and debugger), no "Press <RETURN> to close this window..." line.
I've noticed that with MinGW I get the "Press <RETURN> to close this window..." line.

Given the fact that MinGW is behaving as expected, the fact that the previous test on Linux worked was due to the compiler/debugger more than the Qt version (MinGW is a "Windowized g++")
I suppose that the "CDB Debugger Support" componet installed with the new versions of Qt is screwing some things, and the "Press <RETURN> to close this window..." line won't be displayed no more.

Is there anyone that can confirm this behavior?
And anyone else that knows how to fix it? :)

mrjj

Hi
Not sure if we think about the same command prompt, but ill just mentioned it anyway

alt text

Try flipflop it.

massimo.cristofolini

Yep, I'm talking about that command promt.
The "Run in terminal" checkbox is checked. No better result by unchecking/rechecking/whatever.
From your screenshot, it looks like you are using the last version of Qt libraries (Qt 5.10.0), but an old version of Qt Creator, am I right? As said in my first messages, with older version of Qt Creator (and Qt libs) everything behaved as expected.
If someone can kindly test the last release of Qt+Qt Creator with MSVC compiler/debugger and report their results I'll be very thankful!

mrjj

@massimo.cristofolini
Hi
its the Creator that comes with
Qt5.10. Im just using the classic theme.
Ill check exact version when possible.

massimo.cristofolini

Fooled by the picture.
Uhm... so it actually looks like I'm the only unlucky guy that's experiencing this behavior.
Another test I can make is to install the last version of Qt on a clean Windows system. Will take a while...

mrjj

Hi
If it works with mingw compiler, then it sounds like something with VS compiler ?

massimo.cristofolini

@mrjj I agree. But since I've started experiencing this behavior just after Qt upgrade, on 2 systems, I have to say that both MSVC and Qt have something to do with it.

mrjj

Hi
Im on Creator 5.10 with vs 2015
Maybe delete .user file and set compiler again ?
Or test with default empty project and set Run in terminal.

massimo.cristofolini

As said in the first post, this happens with the default and almost-default console project.
Tried to delete .user file of an existing project: no luck.
Tried creating a new project again: still no luck.

mrjj

@massimo.cristofolini

Ok. i really dont know how it can "fall off"
I have not heard about this before.

it DOES run the qcreator_process_stub.exe ?
(as seen in my image - caption)

massimo.cristofolini

@mrjj Now THAT was the right question!
Running a MinGW project opens the executable in qcreator_process_stub.exe.
Running from a MSVC runs the actual executable (the window title is the executable full path).
The Run Settings for both configurations (MinGW and MSVC (x86 and x64)) looks identical to me; both have "Run in terminal" checked, ... Maybe I have to look in the Run Environment section, since both are set to "use Build Environment", but maybe the environment variables differ for the two configrurations.
Any other hint about where to look at?

mrjj

@massimo.cristofolini

Hi. i didnt find anything else to check with this.
I find it odd if u delete .user file and select compiler how
"run in terminal" can do differently. very odd.

aha_1980

@mrjj said:

Hi. i didnt find anything else to check with this.
I find it odd if u delete .user file and select compiler how
"run in terminal" can do differently. very odd.

Very odd could mean it's a bug. I didn't find something like this problem in the bug database yet.

@massimo-cristofolini: So you could report this issue at bugreports.qt.io

massimo.cristofolini

Done
https://bugreports.qt.io/browse/QTCREATORBUG-19633