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bug#26073: workaround

From: Noam Postavsky
Subject: bug#26073: workaround
Date: Thu, 08 Feb 2018 19:34:38 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux)

Stefan Monnier <address@hidden> writes:

> I just installed a patch into `master` which should hopefully fix this
> problem without introducing new ones.

The examples given still fail on current master.

(require 'generator)
(setq lexical-binding t) ; for easier *scratch* evaluation
(iter-do (y (funcall (iter-lambda (x)
                       (dolist (it x)
                         (let ((y (mapcar (lambda (it) (- it)) it)))
                           (iter-yield y))))
                     '((1 2) ( 3 4))))
  (print y)) ;=> Lisp error: (wrong-type-argument number-or-marker-p (1 2))

(iter-next (funcall (iter-lambda ()
                      (let ((it 1))
                        (iter-yield (funcall (lambda (it) (- it)) (1+ it))))))) 
 ;=> -1

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