Subject: bug#21510: output

From: Drew Adams <[email-masked]>
Date: Sat, 19 Sep 2015 07:18:58 -0700 (PDT)

> Debugger entered--Lisp error: (wrong-type-argument symbolp (car
> list-of-ppsc-var))
> 
> but when I issue
> (symbolp (car list-of-ppsc-var))
> it is t.

*Evaluating* (car list-of-ppsc-var) produces a symbol.

But the sexp (car list-of-ppsc-var) is itself not a symbol.
It is a list. 

You are trying to do (setq (car list-of-ppsc-var) SOMETHING)
- see the backtrace.  `setq' does not evaluate its first argument.