if fn = t.PCToFunc(pc); fn == nil {
		return
	}
	if t.go12line != nil {
		file = t.go12line.go12PCToFile(pc)
		line = t.go12line.go12PCToLine(pc)
	} else {
		file, line = fn.Obj.lineFromAline(fn.LineTable.PCToLine(pc))
	}
	return
}

// LineToPC looks up the first program counter on the given line in
// the named file. It returns [UnknownFileError] or [UnknownLineError] if