1 files changed, 51 insertions, 0 deletions
diff --git a/test/fixedbugs/issue30606b.go b/test/fixedbugs/issue30606b.go
new file mode 100644
index 0000000..2ce2804
--- /dev/null
+++ b/test/fixedbugs/issue30606b.go
@@ -0,0 +1,51 @@
+// run
+
+// Copyright 2019 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 "reflect"
+
+func main() {}
+
+func typ(x interface{}) reflect.Type { return reflect.ValueOf(x).Type() }
+
+var byteType = typ((byte)(0))
+var ptrType = typ((*byte)(nil))
+
+// Arrays of pointers. There are two size thresholds.
+// Bit masks are chunked in groups of 120 pointers.
+// Array types with >16384 pointers have a GC program instead of a bitmask.
+var smallPtrType = reflect.ArrayOf(100, ptrType)
+var mediumPtrType = reflect.ArrayOf(1000, ptrType)
+var bigPtrType = reflect.ArrayOf(16385, ptrType)
+
+var x0 = reflect.New(reflect.StructOf([]reflect.StructField{
+	{Name: "F1", Type: byteType},
+	{Name: "F2", Type: bigPtrType},
+}))
+var x1 = reflect.New(reflect.StructOf([]reflect.StructField{
+	{Name: "F1", Type: smallPtrType},
+	{Name: "F2", Type: bigPtrType},
+}))
+var x2 = reflect.New(reflect.StructOf([]reflect.StructField{
+	{Name: "F1", Type: mediumPtrType},
+	{Name: "F2", Type: bigPtrType},
+}))
+var x3 = reflect.New(reflect.StructOf([]reflect.StructField{
+	{Name: "F1", Type: ptrType},
+	{Name: "F2", Type: byteType},
+	{Name: "F3", Type: bigPtrType},
+}))
+var x4 = reflect.New(reflect.StructOf([]reflect.StructField{
+	{Name: "F1", Type: ptrType},
+	{Name: "F2", Type: smallPtrType},
+	{Name: "F3", Type: bigPtrType},
+}))
+var x5 = reflect.New(reflect.StructOf([]reflect.StructField{
+	{Name: "F1", Type: ptrType},
+	{Name: "F2", Type: mediumPtrType},
+	{Name: "F3", Type: bigPtrType},
+}))