The line it fails on is "./except() [0x80922d1]". Here, bptr + 1 == eptr. But the if does:                     if( bptr++ && eptr )
Which leads to them being equal. There is no name to demangle, so simply returning the original string gets the job done (there's no job to do!). It certainly isn't a fatal assertion error...

As to why it is in here, the trace change triggers this. I don't know why, but looking at it, I noticed there was a name left out so pushed a quick fix for that.