Initial commit: Go 1.23 release state

test/fixedbugs/issue69110.go

@@ -0,0 +1,57 @@
+// run
+
+// Copyright 2024 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 main
+
+import (
+	"maps"
+	_ "unsafe"
+)
+
+func main() {
+	for i := 0; i < 100; i++ {
+		f()
+	}
+}
+
+const NB = 4
+
+func f() {
+	// Make a map with NB buckets, at max capacity.
+	// 6.5 entries/bucket.
+	ne := NB * 13 / 2
+	m := map[int]int{}
+	for i := 0; i < ne; i++ {
+		m[i] = i
+	}
+
+	// delete/insert a lot, to hopefully get lots of overflow buckets
+	// and trigger a same-size grow.
+	ssg := false
+	for i := ne; i < ne+1000; i++ {
+		delete(m, i-ne)
+		m[i] = i
+		if sameSizeGrow(m) {
+			ssg = true
+			break
+		}
+	}
+	if !ssg {
+		return
+	}
+
+	// Insert 1 more entry, which would ordinarily trigger a growth.
+	// We can't grow while growing, so we instead go over our
+	// target capacity.
+	m[-1] = -1
+
+	// Cloning in this state will make a map with a destination bucket
+	// array twice the size of the source.
+	_ = maps.Clone(m)
+}
+
+//go:linkname sameSizeGrow runtime.sameSizeGrowForIssue69110Test
+func sameSizeGrow(m map[int]int) bool