CollectInvalidRect( ) crashes with AGain sample Plugin

[willpirkle]

I reported this issue in detail on the VST3 SDK forum as it is not clear where the problem lies, but I wanted to tag a topic here as well. The VST3 SDK topic is here:

viewtopic.php?f=4&t=628

- Will Pirkle

[ray]

Hi Will,

Maybe this is in some way related to the following "issue": viewtopic.php?f=5&t=542 ?

It happened when my host implementation called into invalid() from any other thread than the UI thread (a design restriction that goes for all VSTGUI calls except setDirty() afaik).

Best,
Ray

[willpirkle]

Thanks Ray - yeah, I do remember seeing that and it jogged my memory when I saw the Rect Collection error.

To be clear, this report is for a VST3 SDK Sample Plugin compiled directly from the SDK with no modifications, and not one of my own plugins or GUI objects.

So I think this is an issue for Steinberg first. It also happens in 3 different VST3 hosts from 3 different manufacturers (the user who found this did issue a trouble ticket for Tracktion).

- Will

[ray]

Thanks Ray - yeah, I do remember seeing that and it jogged my memory when I saw the Rect Collection error.

To be clear, this report is for a VST3 SDK Sample Plugin compiled directly from the SDK with no modifications, and not one of my own plugins or GUI objects.

So I think this is an issue for Steinberg first. It also happens in 3 different VST3 hosts from 3 different manufacturers (the user who found this did issue a trouble ticket for Tracktion).

- Will

Hi Will,

Okay, I see. I was under the impression that it could be a host issue, e.g. if the “perform UI calls from the UI thread exclusively” principle is violated by the implementation for some reason. I agree this seems unlikely if this happens in 3 established hosts.

Best,
Ray