qInitResources_mimetypes() crashes

[ComServant]

For several months and several versions of Qt, I've been on-and-off crashing in qInitResources_mimetypes() before the code even reaches main().

Here's the callstack:

0	(anonymous namespace)::qInitResources_mimetypes_ctor_class_::qInitResources_mimetypes_ctor_class_	qrc_mimetypes.cpp	15851	0x6b9ea223	
1	__static_initialization_and_destruction_0	qrc_mimetypes.cpp	15851	0x6b9ea2a9	
2	_GLOBAL__sub_I__Z24qInitResources_mimetypesv	qrc_mimetypes.cpp	15860	0x6b9ea2db	
3	__do_global_ctors	C:\Qt\Qt5.0.1\5.0.1\mingw47_32\lib\Qt5Cored.dll		0x6b9f2bfa	
4	??			0x2	
5	??			0x22fd24	
6	??

0	(anonymous namespace)::qInitResources_mimetypes_ctor_class_::qInitResources_mimetypes_ctor_class_	qrc_mimetypes.cpp	15851	0x6b9ea223	
1	__static_initialization_and_destruction_0	qrc_mimetypes.cpp	15851	0x6b9ea2a9	
2	_GLOBAL__sub_I__Z24qInitResources_mimetypesv	qrc_mimetypes.cpp	15860	0x6b9ea2db	
3	__do_global_ctors	C:\Qt\Qt5.0.1\5.0.1\mingw47_32\lib\Qt5Cored.dll		0x6b9f2bfa	
4	??			0x2	
5	??			0x22fd24	
6	??

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Why does this occur and how can I work around it?

Currently I'm using Qt 5.0.1, but have had the same problem with 5.0.0 and 4.8. Any ideas?

[Vekman]

I am having the same problem, I dont know what I should do to fix it, did you manage to find a solution or workaround?

[ComServant]

I don't remember if this was the same problem or not, but if so, the problem occurs because your resources are attached to a static library, and C++'s order of static initialization is undefined, so weird crashes can occur on occasion.

The solution is that, for static libraries, you manually initialize your resource packs. See [here].

I do it by explicitly calling:

Q_INIT_RESOURCE(EditorResources); //EditorResources.qrc is the name of the resource package, but you drop the '.qrc'

Q_INIT_RESOURCE(EditorResources); //EditorResources.qrc is the name of the resource package, but you drop the '.qrc'

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However, I also ran into another problem: You can't call Q_INIT_RESOURCE() from inside a namespace (I guess it messes up some macro or something).

So I had to do it like this:

//This function is because Q_INIT_RESOURCE() is required to be called from a plain function not in any namespace.
//That macro needs to be called to initialize Qt Resource archives when in dynamic or static libraries.
void InitializeQtResources()
{
	Q_INIT_RESOURCE(EditorResources);
}
 
namespace Platform
{
	MainWindow::MainWindow(int argc, char *argv[])
		: ui(new Ui::MainWindow)
	{
		//Initialize all the images we have baked into the static library in Qt resource packages.
		InitializeQtResources();
 
		//Initialize the widgets that are children of this widget.
		ui->setupUi(this);
 
		this->initializeMyWidgets();
	}
 
} //End of namespace.

//This function is because Q_INIT_RESOURCE() is required to be called from a plain function not in any namespace.
//That macro needs to be called to initialize Qt Resource archives when in dynamic or static libraries.
void InitializeQtResources()
{
	Q_INIT_RESOURCE(EditorResources);
}

namespace Platform
{
	MainWindow::MainWindow(int argc, char *argv[])
		: ui(new Ui::MainWindow)
	{
		//Initialize all the images we have baked into the static library in Qt resource packages.
		InitializeQtResources();

		//Initialize the widgets that are children of this widget.
		ui->setupUi(this);

		this->initializeMyWidgets();
	}

} //End of namespace.

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That was quite a while ago, so I don't know if the problem I was having in this thread is the same or a different problem.