Application crash with TERMINATED

Esley

Hello guys,

I have one application made in QT, and sometimes when I start it, occurr an inexpected TERMINATED error.
But If I retry sometimes, the application open normally.

ebonomo@ICCSW-044681NB /usr/local/app/bin$ ./myapp 
Terminado
ebonomo@ICCSW-044681NB /usr/local/app/bin$ ./myapp 
Terminado
ebonomo@ICCSW-044681NB /usr/local/app/bin$ ./myapp 
"Iniciando ...
.....

I created a lib folder in app/lib with all libs detected in lddtree. I changed too in .bashrc to set LDLIBRARY_PATH

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/app/lib/

But I can't get why this error. Could you help me? How can I get the cause? Is there any command to check it?

I already tried remove all in main method keeping only a debug message, and the error occurred yet.

I don't know more what can I do. :(

My environment is:

Ubuntu 20.04
Qt 5.15.2
Qt Creator 7.0.1
- Based on Qt 6.2.3 (GCC 10.3.1 20210422 (Red Hat 10.3.1-1), 64 bit)
- Built on Apr 26 2022 01:18:11
- From revision da16d778d5

JonB

@Esley
If you claim it intermittent then it cannot be something like a library path that is at issue. I have no idea what your cause may be. Run it in a debugger and see if you get any more information when it does terminate.

Esley

@JonB in Qt Creator for example, running normal or debugging, I get only this in application console:

12:00:00 Starting myapp...
12:00:00 myapp crashed.

Nothing more to help me is printed in console

Anonymous_Banned275

Assuming it is intermittent - you still have an option to set breakpoints until you find where it no longer runs correctly.
Another way which sometime works when GDB is not cooperating -setup temporary "return" or even "exit" to find the bug.

Esley

I can reproduce:

int main(int argc, char *argv[])
{
    qFatal("Starting application");
}

My .pro is it:

#-------------------------------------------------
#
# Project created by QtCreator 2020-09-24T10:15:43
#
#-------------------------------------------------

QT       += core gui network svg
QT       += multimedia
QT       += multimediawidgets
QT       += 3drender
QT       += printsupport

CONFIG += ccache use_gold_linker precompile_header # Improve Build Speed
PRECOMPILED_HEADER = precompiled_header.h

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets quick

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH = $$PWD/ui/imports

TARGET = myapp
TEMPLATE = app

INCLUDEPATH += $$PWD/libs
INCLUDEPATH += $$PWD/libs/qtmqtt
INCLUDEPATH += /usr/include/opencv4
INCLUDEPATH += $$PWD/imagerender/src
INCLUDEPATH += $$PWD/libs/fingerprint/Futronic/header


#Include static lib QT MQTT
equals(QT_VERSION, "5.15.2") {
    #message("Loading lib libQt5Mqtt for 5.15.2")
    LIBS += -L$$PWD/libs/qtmqtt/5.15.2 -lQt5Mqtt
    QMAKE_LFLAGS += -Wl,--rpath=$$PWD/libs/qtmqtt/5.15.2
}

equals(QT_VERSION, "5.15.1") {
    #message("Loading lib libQt5Mqtt for 5.15.1")
    LIBS += -L$$PWD/libs/qtmqtt/5.15.1 -lQt5Mqtt
    QMAKE_LFLAGS += -Wl,--rpath=$$PWD/libs/qtmqtt/5.15.1
}

LIBS += -L$$PWD/libs/fingerprint/Futronic -lScanAPI
QMAKE_LFLAGS += -Wl,--rpath=$$PWD/libs/fingerprint/Futronic

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
LIBS += -lopencv_core
LIBS += -lopencv_highgui
LIBS += -lopencv_imgproc
LIBS += -lopencv_features2d
LIBS += -lopencv_calib3d
LIBS += -lopencv_videoio
LIBS += -lopencv_imgcodecs
LIBS += -lrt

SOURCES += \
    main.cpp
    # a lot of .cpp here

HEADERS += \
    constants.h 
    # a lot of .h here

FORMS +=

DISTFILES += \
    settings.ini

RESOURCES += \
    resources.qrc \
    images/logos/logo.png

TRANSLATIONS += i18n/en.ts \
               i18n/es.ts \
               i18n/pt.ts

# From here https://stackoverflow.com/a/36438618
copydata.commands = $(COPY_DIR) $$PWD/settings.ini $$OUT_PWD
first.depends = $(first) copydata

export(first.depends)
export(copydata.commands)

QMAKE_CXXFLAGS += -Wno-unknown-pragmas # Ignore pragma region warnings
QMAKE_EXTRA_TARGETS += first copydata

JonB

@Esley said in Application crash with TERMINATED:

qFatal("Starting application");

Umm, what do you expect this to do?? It seems to be behaving correctly....

As a separate issue, I am not 100% sure that can/are supposed to use qFatal() without having created some QApplication first.

A.A.SEZEN

In your main window's creation lines, also qInfo() << ""; Proceed with. It will guide you to which line it progresses. For example, there may be definitions of your widgets that conflict with an operation such as restoreGometry (again for example, QDockWidget). Thus, the window is loaded when compatible, otherwise it crashes. In any case, as our other friends emphasized, qInfo(), qDebug() etc. It will be useful for you to progress with the flow of information.