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Bug in CL with destructuring-bind and default arguments
From: |
Jeremy Maitin-Shepard |
Subject: |
Bug in CL with destructuring-bind and default arguments |
Date: |
Fri, 05 Sep 2008 10:23:35 -0700 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux) |
Hello,
I've noticed a bug in CL with destructuring-bind:
This should work:
(destructuring-bind (&optional (a 1)) '() a)
But instead it gives an error:
Debugger entered--Lisp error: (void-variable bind-enquote)
cl-do-arglist((&optional (a 1)) 'nil)
#[(args expr &rest body) "ÆÆÇÈ É
\"ÊË\nÌD ¤¤C#-" [bind-lets bind-forms bind-inits bind-defs bind-block
args nil cl-none cl-do-arglist (&aux) append (progn) let* expr body]
6]((&optional (a 1)) 'nil a)
(destructuring-bind (&optional (a 1)) 'nil a)
eval((destructuring-bind (&optional (a 1)) 'nil a))
eval-last-sexp-1(nil)
eval-last-sexp(nil)
call-interactively(eval-last-sexp nil nil)
Let-binding bind-enquote to nil in the definition of destructuring-bind
seems to fix the problem (as does wrapping such a let-bind around the
call to destructuring-bind), but I don't know if that is the right fix.
My Emacs version is a CVS build: GNU Emacs 23.0.60.1 (x86_64-pc-linux-gnu) of
2008-07-25
but I suspect this bug has been around for ages.
--
Jeremy Maitin-Shepard
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