i came across an odd glitch in objective-c code, e.g. qt6-dev/qtmultimedia/src/plugins/multimedia/darwin/avfaudiodecoder.mm

there is a dispatch_async with a lambda function:

        dispatch_async(m_decodingQueue, [=, this]() {
            if (!weakContext.expired() && CMSampleBufferDataIsReady(sampleBuffer)) {
                auto audioBuffer = handleNextSampleBuffer(format, sampleBuffer);

                if (audioBuffer.isValid())
                    invokeWithDecodingContext(weakContext, [=, this]() {
                        handleNewAudioBuffer(audioBuffer);
                    });
            }
        });

when having the text cursor inside the lambda, the `dispatch_async` symbol is highlighted as "current symbol", and "follow symbol under cursor" jumps to the definition of `async_dispatch`.

observation:

• the behaviour is identical, no matter where in the lambda the text cursor is (lambda body, capture, arguments)
• i'm only seeing this with dispatch_async. not when passing lambda functions as argument to other functions, so i wonder if it might be related to dispatch_block_t