Subject: GOOPS problem with GNU Guile 2.1.4
From: Jan Wedekind <[email-masked]>
To: [email-masked]
Date: Sat, 17 Sep 2016 21:43:32 +0100 (BST)
List-Id: <debbugs-submit.debbugs.gnu.org>

Hi,

The following program works fine under GNU Guile 2.0.12:

     (use-modules (oop goops))
     (define-generic native-type)
     (define-method (native-type (i <integer>) . args) 0)
     (define-method (native-type (i <real>) . args) 1)
     (define-method (native-type (b <boolean>) . args) 2)

     (native-type 1)
     (native-type 1.3)
     (native-type #f)
     (native-type 1 1.2)
     (native-type 1.4 2)
     (native-type 1.4 2 3)
     (native-type 1.4 1.5)
     (native-type #f #t)

However under GNU Guile 2.1.4 [1] it fails with an error in 
"multiple-arity-dispatcher":

     oop/goops.scm:1336:2: oop/goops.scm:1336:2: In procedure vector-ref: Value out of range: 3

     Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.

Getting the backtrace didn't work:

     ,bt
     In oop/goops.scm:
     While executing meta-command:
     ERROR: In procedure vector-set!: Value out of range: 5

Regards
Jan

[1] http://alpha.gnu.org/gnu/guile/guile-2.1.4.tar.xz