diff --git a/vendor/github.com/modern-go/reflect2/unsafe_type.go b/vendor/github.com/modern-go/reflect2/unsafe_type.go
new file mode 100644
index 0000000..1394171
--- /dev/null
+++ b/vendor/github.com/modern-go/reflect2/unsafe_type.go
@@ -0,0 +1,85 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type unsafeType struct {
+	safeType
+	rtype    unsafe.Pointer
+	ptrRType unsafe.Pointer
+}
+
+func newUnsafeType(cfg *frozenConfig, type1 reflect.Type) *unsafeType {
+	return &unsafeType{
+		safeType: safeType{
+			Type: type1,
+			cfg:  cfg,
+		},
+		rtype:    unpackEFace(type1).data,
+		ptrRType: unpackEFace(reflect.PtrTo(type1)).data,
+	}
+}
+
+func (type2 *unsafeType) Set(obj interface{}, val interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Set argument 1", type2.ptrRType, objEFace.rtype)
+	valEFace := unpackEFace(val)
+	assertType("Type.Set argument 2", type2.ptrRType, valEFace.rtype)
+	type2.UnsafeSet(objEFace.data, valEFace.data)
+}
+
+func (type2 *unsafeType) UnsafeSet(ptr unsafe.Pointer, val unsafe.Pointer) {
+	typedmemmove(type2.rtype, ptr, val)
+}
+
+func (type2 *unsafeType) IsNil(obj interface{}) bool {
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *unsafeType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	return ptr == nil
+}
+
+func (type2 *unsafeType) UnsafeNew() unsafe.Pointer {
+	return unsafe_New(type2.rtype)
+}
+
+func (type2 *unsafeType) New() interface{} {
+	return packEFace(type2.ptrRType, type2.UnsafeNew())
+}
+
+func (type2 *unsafeType) PackEFace(ptr unsafe.Pointer) interface{} {
+	return packEFace(type2.ptrRType, ptr)
+}
+
+func (type2 *unsafeType) RType() uintptr {
+	return uintptr(type2.rtype)
+}
+
+func (type2 *unsafeType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *unsafeType) UnsafeIndirect(obj unsafe.Pointer) interface{} {
+	return packEFace(type2.rtype, obj)
+}
+
+func (type2 *unsafeType) LikePtr() bool {
+	return false
+}
+
+func assertType(where string, expectRType unsafe.Pointer, actualRType unsafe.Pointer) {
+	if expectRType != actualRType {
+		expectType := reflect.TypeOf(0)
+		(*iface)(unsafe.Pointer(&expectType)).data = expectRType
+		actualType := reflect.TypeOf(0)
+		(*iface)(unsafe.Pointer(&actualType)).data = actualRType
+		panic(where + ": expect " + expectType.String() + ", actual " + actualType.String())
+	}
+}