Using windows, juce tip, x64 vst hosting crashes when loading a 64bit vst upon calling first dispatch.
I think its related to the type warnings present in juce_VSTPluginFormat.cpp when compiling x64 code:
1>z:\libs\juce\modules\juce_audio_processors\format_types/juce_VSTPluginFormat.cpp(1428): warning C4244: ‘=’ : conversion from ‘juce::VstIntPtr’ to ‘int’, possible loss of data
1>z:\libs\juce\modules\juce_audio_processors\format_types/juce_VSTPluginFormat.cpp(2648): warning C4244: ‘argument’ : conversion from ‘juce::VstIntPtr’ to ‘juce::VstInt32’, possible loss of data
1>z:\libs\juce\modules\juce_audio_processors\format_types/juce_VSTPluginFormat.cpp(2650): warning C4244: ‘argument’ : conversion from ‘juce::VstIntPtr’ to ‘juce::VstInt32’, possible loss of data