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bug#38611: Guile 2.9.7 regression: "duplicate" record field names
From: |
Göran Weinholt |
Subject: |
bug#38611: Guile 2.9.7 regression: "duplicate" record field names |
Date: |
Sat, 14 Dec 2019 14:31:10 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) |
Hello schemers,
The following program works in Guile 2.2.6 (and other R6RS
implementations), but raises an exception in Guile 2.9.7. A field called
"name" exists in record type a and record type b, but there is no actual
naming conflict as I understand it.
--8<---------------cut here---------------start------------->8---
(import (rnrs))
(define-record-type a
(fields name))
(define-record-type b
(parent a)
(fields name))
(let ((x (make-b 'a 'b)))
(write (list (a-name x)
(b-name x)))
(newline))
--8<---------------cut here---------------end--------------->8---
It should print (a b). The backtrace:
--8<---------------cut here---------------start------------->8---
Backtrace:
In ice-9/boot-9.scm:
1722:10 8 (with-exception-handler _ _ #:unwind? _ # _)
In unknown file:
7 (apply-smob/0 #<thunk 56291f86b320>)
In ice-9/boot-9.scm:
718:2 6 (call-with-prompt _ _ #<procedure default-prompt-handle?>)
In ice-9/eval.scm:
619:8 5 (_ #(#(#<directory (guile-user) 56291f8eff00>)))
In ice-9/boot-9.scm:
2792:4 4 (save-module-excursion _)
4336:12 3 (_)
In /tmp/foo.sps:
6:0 2 (_)
In ice-9/boot-9.scm:
1090:10 1 (make-record-type b ((immutable name)) _ #:parent _ # _ ?)
1073:12 0 (append-fields _ _)
ice-9/boot-9.scm:1073:12: In procedure append-fields:
duplicate field name
--8<---------------cut here---------------end--------------->8---
Regards,
--
Göran Weinholt | https://weinholt.se/
Debian developer | 73 de SA6CJK
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