I forgot the whole thing's in list context so @content doesn't need stringifying.

Oh, it's not the context; it's that you were passing @LOG, which was never set to anything.

As for the the occurrence (of @content) at the top, it does do something, it satisfies the strictures

Ah, I see. I'm leery of writing it that way; it looks too much like a bug, like you meant to assign something to it there.