Yes. Sorry. I meant that we'd eventually "get" the bug nailed down.
And yes, I've gotten Sigil to crash with both your test epub and others, but it's not been a 100% consistent thing for me. When performing the exact same steps, I'm experiencing different outcomes. Sometimes your epub (and all epubs) crash at the point of html toc generation, and sometimes your epub (and the same epubs that crashed before) don't crash at all.
I've not tried Kevin's latest change yet, but if it eliminates the problem altogether, I'll stop worrying about tracking down the exact nature of the bug at some point.
