Generic standalone - crash on exit in osx 64 bits

General JUCE discussion
1

I made a generic standalone application that dynamically loads a vst. Here is the code, that loads
/Library/Audio/Plug-Ins/VST/test.VST


class JUCEHelloWorldApplication : public JUCEApplication
{
public:
    //==============================================================================
    JUCEHelloWorldApplication() {}
    
    //==============================================================================
    void initialise (const String& commandLine)
    {
        helloWorldWindow = new StandaloneFilterWindow("Hello", Colour(30, 30, 30), nullptr);
        helloWorldWindow->setVisible(true);
    }
    
    void shutdown()
    {
        // This method is where you should clear-up your app's resources..
        
        // The helloWorldWindow variable is a ScopedPointer, so setting it to a null
        // pointer will delete the window.
        helloWorldWindow = nullptr;
    }
    
    //==============================================================================
    const String getApplicationName()
    {
        return "Hello World for JUCE";
    }
    
    const String getApplicationVersion()
    {
        // The ProjectInfo::versionString value is automatically updated by the Jucer, and
        // can be found in the JuceHeader.h file that it generates for our project.
        return ProjectInfo::versionString;
    }
    
    bool moreThanOneInstanceAllowed()
    {
        return true;
    }
    
    void anotherInstanceStarted (const String& commandLine)
    {
    }
    
private:
    ScopedPointer<StandaloneFilterWindow> helloWorldWindow;
};
// This kicks the whole thing off..
START_JUCE_APPLICATION (JUCEHelloWorldApplication)

AudioProcessor* createPluginFilter()
{
    AudioPluginFormatManager formatManager;
    formatManager.addDefaultFormats();
    PluginDescription desc;
    desc.pluginFormatName = "VST";
    desc.fileOrIdentifier = "/Library/Audio/Plug-Ins/VST/test.VST";
    
    String errorMessage;
    return formatManager.createPluginInstance(desc, 44100.0f, 512, errorMessage);
}

This works well on OSX 32bits and all Windows flavors, but on OSX64, quitting the app causes the following crash:

Thread 0 Crashed:: Juce Message Thread  Dispatch queue: com.apple.main-thread
0   libobjc.A.dylib                   0x00007fff841fd4d5 realizeClass(class_t*) + 34
1   libobjc.A.dylib                   0x00007fff841fd5bd realizeClass(class_t*) + 266
2   libobjc.A.dylib                   0x00007fff841f209f prepareForMethodLookup + 80
3   libobjc.A.dylib                   0x00007fff841f1eef lookUpMethod + 71
4   libobjc.A.dylib                   0x00007fff841f02fc objc_msgSend + 188
5   libobjc.A.dylib                   0x00007fff841f2236 _class_initialize + 310
6   libobjc.A.dylib                   0x00007fff841f20f3 prepareForMethodLookup + 164
7   libobjc.A.dylib                   0x00007fff841f1eef lookUpMethod + 71
8   libobjc.A.dylib                   0x00007fff841f02fc objc_msgSend + 188
9   com.apple.AppKit                  0x00007fff8c239401 -[NSView setNextKeyView:] + 314
10  com.apple.AppKit                  0x00007fff8c282c69 -[NSView _removeFromKeyViewLoop] + 94
11  com.apple.AppKit                  0x00007fff8c282476 -[NSView _finalizeWithReferenceCounting] + 784
12  com.apple.AppKit                  0x00007fff8c28213e -[NSView dealloc] + 42
13  com.apple.CoreFoundation          0x00007fff8688628a CFRelease + 170
14  com.apple.CoreFoundation          0x00007fff868c3efc -[__NSArrayI dealloc] + 140
15  libobjc.A.dylib                   0x00007fff841f4230 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 464
16  com.apple.CoreFoundation          0x00007fff868add72 _CFAutoreleasePoolPop + 34
17  com.apple.Foundation              0x00007fff885f447a -[NSAutoreleasePool drain] + 154

This happens with every VST I've tried, so I don't think the plugins are the cause. Any idea what's going wrong, and how to fix it ?

Thanks in advance,

P@

PS. Using Juce 3.0.1

2

Shall I repost this in "MacOSX specific issues" ?

3

No, but I have no idea what might be wrong.

And since you're using 3.0.1, there's no way I can investigate unless you show this to still happen in the latest code, and can give me some example code that replicates the problem.

JUCE_AUTORELEASEPOOL BAD_ACCESS in VST destructor
4

Jules,

I tried the code above with a fresh git clone. It crashes just the same at shutdown, with every plugin I've tried.

The issue only happens on OSX 64bits.

Thanks,

'Tick

5

Try deleting the plugin's UI, then running the message loop for a moment, e.g. 1 sec, then deleting the plugin, then running the message loop again, and then quit. Sometimes the obj-C runtime gets into a mess if you unload a DLL before the UI objects have had a chance to clean themselves up.