schema/field: reject pointers for basic types (#505)

schema/field/field.go

@@ -728,7 +728,7 @@ func (d *Descriptor) goType(typ interface{}, expectKind reflect.Kind) {
 		info.Nillable = true
 	}
 	switch {
-	case tv.Kind() == expectKind:
+	case t.Kind() == expectKind:
 	case t.Implements(valueScannerType):
 		n := t.NumMethod()
 		for i := 0; i < n; i++ {

schema/field/field_test.go

@@ -146,6 +146,8 @@ func TestString(t *testing.T) {
 	assert.Error(t, fd.Err())
 	fd = field.String("name").GoType(struct{}{}).Descriptor()
 	assert.Error(t, fd.Err())
+	fd = field.String("name").GoType(new(http.Dir)).Descriptor()
+	assert.Error(t, fd.Err())
 }
 
 func TestTime(t *testing.T) {