weird segmentation fault on startup

[mustermann.klaus@gmx.de]

Hi there,

I'm currently experiencing a strange behaviour.

DEFINES += QT_NO_DEBUG_OUTPUT
CONFIG  += release
TARGET      = myProg
TEMPLATE  = app

DEFINES += QT_NO_DEBUG_OUTPUT
CONFIG  += release
TARGET      = myProg
TEMPLATE  = app

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When built as realease it leads to a segmentation error on startup insight the IDE.

I switch to debug mode using modified pro file

#DEFINES += QT_NO_DEBUG_OUTPUT
#CONFIG  += release
TARGET      = myProg
TEMPLATE  = app

#DEFINES += QT_NO_DEBUG_OUTPUT
#CONFIG  += release
TARGET      = myProg
TEMPLATE  = app

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It runs fine.

sigsegv.jpg

When it occurs, it compiles and starts. On startup it runs into the error. The strange thing now is: I can press the "resume"-button, and it works. Program starts after hitting this button twice. Furthermore I can deploy the resulting *.exe and it works without any problems.

However I'm not a pro-programmer. I'm more or less coming from the "user"-side and I used Qt as a substitute for Matlab. That's why I'm not to familiar with debugging methods. I debugged algorithms and functions, observed incrementors and condition. But this seems to be beyond my horizon. Looks like it involves system-functions and -libraries. I would be glad if somebody could give me a hint on how to start finding out all about this.

I did an update to latest Qt5-version. No effect.

version.png

Thanks in advance, Lars