mfrasier VS Code outputs the error "Unknown suspend reason: 7 for isolate with ID: 3"
Have you updated to version 1.6.0 of the vscode-swf-debug extension? I can see that suspend reason 7 was not handled in earlier versions, but it should now be properly handled in 1.6.0. Most people should be auto-updated, but maybe you disabled auto-updates?
In 1.5.0 and earlier, a freshly launched worker would sometimes start in a paused state that the extension couldn't properly resume. It was intermittent, so sometimes it would resume, while sometimes it wouldn't, because I was attempting to resume at the wrong time.
mfrasier If the latter, why is "this" linked to one of the fonts I'm embedding?
In this case,
this appears to be the "global" scope for a particular class file, and
Lato-Regular_ttf$_____ is a variable in that scope. I would guess that it's probably paused somewhere inside the generated class that contains the embedded font. And yes, since you are using the bytes of the main SWF for the worker, then it will need to reload everything from the main SWF, including embeds.