QCA::initializer destructor crashes app

[jmrodrig]

Hi,
I reopen an old topic (old topic).

I use Qt 5.7, QCA 2.1.1, and msvc2015 32bit.

To resume, my app crashes when QCA::initializer goes out of scope when there is not any Qt installation folder.
If i have the Qt installation folder, the app does not crash.
If I rename the Qt installation folder (to avoid any references to it), the app crashes.

So I supposed that a dll is missing in my app deployment. Dependency walker does not find any missing dependencies.
But, if i rename only the "plugins" folder ([Qt installation folder]\5.7\msvc2015\plugins to avoid any references to it), my app crashes.
I repeat the operation with each folders in "plugins". But no one seems to be responsible of the app crash.
To finish, I renamed the Qt installation folder, and I created an empty Qt\5.7\msvc2015\plugins folder. The app does not crash.

It seems that my app or QCA keep a reference to the Qt installation "plugins" folder but I can't find how and where.

Any help please?

Thank you