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bug#2966: 23.0.92; A typing error in debugger-eval-expression stops the
From: |
Daniel Clemente |
Subject: |
bug#2966: 23.0.92; A typing error in debugger-eval-expression stops the debugger |
Date: |
Sat, 11 Apr 2009 19:01:47 -0700 (PDT) |
Eval anything with (debug) on it, like:
(let* ((x 3) (y 1))
(debug)
(dotimes (a x) (setq y (* y x)))
y
)
When the debugger appears, press e to evaluate some symbol. You can type x
RET to see the value of x. But now try a symbol which doesn't exist, for
instance z. You get:
Debugger entered--Lisp error: (void-variable z)
eval(z)
eval-expression(z)
debugger-eval-expression(z)
call-interactively(debugger-eval-expression nil nil)
recursive-edit()
And at this point, your debugger session is (apparently) lost and you can't
continue debugging your program: e.g. "c" doesn't work and it only says (error
"Cannot return from the debugger in an error")
It is very annoying that Emacs makes you restart debugging just because you
did a typing error in a very infortunate moment. Even if there is some way to
get out of this „error inside the evaluated expression“, the default behaviour
is shocking.
Can't errors like void-variable / void-function be ignored by default in
debugger-mode?
-- Daniel
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Daniel Clemente <=