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From 8a60cd5d8f7e7d9658db2f6ed11bf1dbdbcb62e4 Mon Sep 17 00:00:00 2001
From: Andy Wingo <wingo@pobox.com>
Date: Thu, 15 Aug 2024 12:18:02 +0200
Subject: Fix intset-fold-right on transient intsets
* module/language/cps/intset.scm (make-intset-folder): intset-fold-right
on a transient intset would dispatch to left fold after making the
persistent set. Sadness!
Origin: upstream, commit d0790d766bedf08fb65231eff53f6c8044eb94f1
---
module/language/cps/intset.scm | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/module/language/cps/intset.scm b/module/language/cps/intset.scm
index 54def5cb5..0fe90fe9f 100644
--- a/module/language/cps/intset.scm
+++ b/module/language/cps/intset.scm
@@ -1,5 +1,5 @@
;;; Functional name maps
-;;; Copyright (C) 2014, 2015, 2017 Free Software Foundation, Inc.
+;;; Copyright (C) 2014, 2015, 2017, 2024 Free Software Foundation, Inc.
;;;
;;; This library is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU Lesser General Public License as
@@ -454,13 +454,14 @@
(lp (if forward? (1+ i) (1- i)) seed ...)))
(lp (if forward? (1+ i) (1- i)) seed ...)))
(values seed ...)))))))
- (match set
- (($ <intset> min shift root)
- (cond
- ((not root) (values seed ...))
- (else (visit-branch root shift min seed ...))))
- (($ <transient-intset>)
- (intset-fold f (persistent-intset set) seed ...)))))
+ (let fold ((set set))
+ (match set
+ (($ <intset> min shift root)
+ (cond
+ ((not root) (values seed ...))
+ (else (visit-branch root shift min seed ...))))
+ (($ <transient-intset>)
+ (fold (persistent-intset set)))))))
(define intset-fold
(case-lambda
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