When marking stuff in an info file via double click, I often get a
backtrace like the following:
Debugger entered--Lisp error: (args-out-of-range 1 262195)
buffer-substring-no-properties(1 262195)
pop-mark()
mouse-drag-track((down-mouse-1 (#<window 3 on *info*> 262195 (10 . 308)
26997248 nil 262195 (1 . 14) nil (3 . 6) (7 . 15))) t)
mouse-drag-region((down-mouse-1 (#<window 3 on *info*> 262195 (10 . 308)
26997248 nil 262195 (1 . 14) nil (3 . 6) (7 . 15))))
call-interactively(mouse-drag-region nil nil)
It does not seem to happen at the beginning of the info file, but is
rather common at the end of large info files (like in "(emacs) Bugs").