* bug#75364: Manual: Alist example does not work
@ 2025-01-04 15:59 Jens Egon Nyborg
2025-01-04 21:27 ` dsmich
2025-01-04 23:34 ` lloda
0 siblings, 2 replies; 3+ messages in thread
From: Jens Egon Nyborg @ 2025-01-04 15:59 UTC (permalink / raw)
To: 75364
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I run
(define capitals '(("New York" . "Albany")
("Oregon" . "Salem")
("Florida" . "Miami")))
followed by
(set! capitals
(assoc-set! capitals "Florida" "Tallahassee"))
and get
"ice-9/boot-9.scm:1676:22: In procedure raise-exception:
In procedure set-cdr!: Wrong type argument in position 1 (expecting
mutable pair): ("Florida" . "Miami")
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue."
(In geiser in emacs on Arch)
Warning: In my own code it actually worked on and off.
Work-around: Use
(define capitals (list (cons "New York" "Albany")
(cons "Oregon" . "Salem")
(cons "Florida" . "Miami")))
apparently quoted lists are not mutable!
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2025-01-04 15:59 bug#75364: Manual: Alist example does not work Jens Egon Nyborg
2025-01-04 21:27 ` dsmich
2025-01-04 23:34 ` lloda
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