From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Tue, 16 Apr 2024 21:19:13 +0200
Subject: Adding upstream version 1.21.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 test/fixedbugs/issue56777.go | 56 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 test/fixedbugs/issue56777.go

(limited to 'test/fixedbugs/issue56777.go')

diff --git a/test/fixedbugs/issue56777.go b/test/fixedbugs/issue56777.go
new file mode 100644
index 0000000..8097ce9
--- /dev/null
+++ b/test/fixedbugs/issue56777.go
@@ -0,0 +1,56 @@
+// compile
+
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+func fn(setText []rune, negate bool) int {
+	ranges := []singleRange{}
+
+	if len(setText) > 0 {
+		fillFirst := false
+		l := len(setText)
+		if negate {
+			if setText[0] == 0 {
+				setText = setText[1:]
+			} else {
+				l++
+				fillFirst = true
+			}
+		}
+
+		if l%2 == 0 {
+			ranges = make([]singleRange, l/2)
+		} else {
+			ranges = make([]singleRange, l/2+1)
+		}
+
+		first := true
+		if fillFirst {
+			ranges[0] = singleRange{first: 0}
+			first = false
+		}
+
+		i := 0
+		for _, r := range setText {
+			if first {
+				// lower bound in a new range
+				ranges[i] = singleRange{first: r}
+				first = false
+			} else {
+				ranges[i].last = r - 1
+				i++
+				first = true
+			}
+		}
+	}
+
+	return len(ranges)
+}
+
+type singleRange struct {
+	first rune
+	last  rune
+}
-- 
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