Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/test/fixedbugs/issue11286.go b/test/fixedbugs/issue11286.go
new file mode 100644
index 0000000..560b7d4
--- /dev/null
+++ b/test/fixedbugs/issue11286.go
@@ -0,0 +1,34 @@
+// run
+
+// Copyright 2015 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.
+
+// Test that pointer bitmaps of types with large scalar tails are
+// correctly repeated when unrolled into the heap bitmap.
+
+package main
+
+import "runtime"
+
+const D = 57
+
+type T struct {
+	a [D]float64
+	b map[string]int
+	c [D]float64
+}
+
+var ts []T
+
+func main() {
+	ts = make([]T, 4)
+	for i := range ts {
+		ts[i].b = make(map[string]int)
+	}
+	ts[3].b["abc"] = 42
+	runtime.GC()
+	if ts[3].b["abc"] != 42 {
+		panic("bad field value")
+	}
+}