"Jeffrey C Honig" wrote:

> M-xhanoiRET

Erk.

Seems to be a font-lock related transpose-regions problem.

emacs -Q

Type "abcd" in scratch

M-: (transpose-regions 1 2 3 4)

Debugger entered--Lisp error: (args-out-of-range 0 0)
  get-text-property(0 font-lock-multiline)
  font-lock-extend-jit-lock-region-after-change(0 0 0)
  run-hook-with-args(font-lock-extend-jit-lock-region-after-change 0 0 0)
  jit-lock-after-change(0 0 0)
  transpose-regions(1 2 3 4)
  eval((transpose-regions 1 2 3 4))
  eval-expression((transpose-regions 1 2 3 4) nil)
  call-interactively(eval-expression)


If you repeat the experiment and disable font-lock before calling
transpose-regions, Emacs segfaults.



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