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bug#8548: 23.3; Lisp debugger can't exit recursive edit level
From: |
Stefan Monnier |
Subject: |
bug#8548: 23.3; Lisp debugger can't exit recursive edit level |
Date: |
Mon, 25 Apr 2011 12:03:27 -0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) |
> The Lisp debugger is supposed to enter a recursive editing level. So, one
> would expect that it would be possible to exit each recursive level
> independently. The original debugger implemented in Elisp used to work
> fine. But, ever since the debugger was moved to the C implementation
> (probably Emacs 19), the recursive levels cannot be exited.
> To reproduce the problem, do `M-: (debug)' and then type something
> errorneous, e.g.,
> e RET (car 1) RET
> A second recursive level gets entered. However, exit-recursive-edit does
> not do its job here. It says "Cannot return from the debugger in an error".
This part of the C code was changed recently, so now the behavior is
that you get "Wrong type argument: listp, 1" in the minibuffer and
you're back in the first recursive level (which all sounds right).
OTOH the *Backtrace* buffer does not display the stack trace any more
and is in fundamental mode, so there's still something wrong here.
BTW, you get the same result if you hit `c' rather than calling
exit-recursive-edit.
Stefan