Unlock of an os_unfair_lock not owned by current thread

[reuk]

No, it was to fix this one:

Race condition (i.e. CRASH) in MessageManager::Lock (with fix!)

Scenario We run all our plugins through pluginval. Occasionally we pluginval fails when fuzzing the parameters of the VST3 versions of our plugins. The output is: Starting test: pluginval / Fuzz parameters... Exception: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) The call-stack is: [...] juce::WaitableEvent::signal() const juce_WaitableEvent.cpp:62 [Inlined] juce::MessageManager::abort() const juce_MessageManager.cpp:404 [Inlined] juce::MessageManager::messageCallback(…

It’s possible that the issues have the same underlying cause.