diff --git a/src/reflect/type.go b/src/reflect/type.go
index 5ce80c61dc..531417ea93 100644
--- a/src/reflect/type.go
+++ b/src/reflect/type.go
@@ -2712,6 +2712,7 @@ func StructOf(fields []StructField) Type {
 				}
 			}
 		}
+		prog = append(prog, 0)
 		*(*uint32)(unsafe.Pointer(&prog[0])) = uint32(len(prog) - 4)
 		typ.kind |= kindGCProg
 		typ.gcdata = &prog[0]
diff --git a/test/fixedbugs/issue30606.go b/test/fixedbugs/issue30606.go
new file mode 100644
index 0000000000..bc31982e10
--- /dev/null
+++ b/test/fixedbugs/issue30606.go
@@ -0,0 +1,20 @@
+// 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 x = reflect.New(reflect.StructOf([]reflect.StructField{
+	{Name: "F5", Type: reflect.StructOf([]reflect.StructField{
+		{Name: "F4", Type: reflect.ArrayOf(5462,
+			reflect.SliceOf(typ(uint64(0))))},
+	})},
+}))