Fix repeating error message

errors.go

@@ -96,24 +96,13 @@ type printable struct {
 func (x *Error) Error() string {
 	s := x.msg
 	cause := x.cause
-	for i := 0; i < 16; i++ {
-		if cause == nil {
-			break
-		}
-
-		s = fmt.Sprintf("%s: %v", s, cause.Error())
-		type errorUnwrap interface {
-			Unwrap() error
-		}
 
-		unwrapable, ok := cause.(errorUnwrap)
-		if !ok {
-			break
-		}
-
-		cause = unwrapable.Unwrap()
+	if cause == nil {
+		return s
 	}
 
+	s = fmt.Sprintf("%s: %v", s, cause.Error())
+
 	return s
 }
 

test/errors_test.go

@@ -96,3 +96,8 @@ func TestFormat(t *testing.T) {
 	err := goerr.New("test: %s", "blue")
 	assert.Equal(t, "test: blue", err.Error())
 }
+
+func TestErrorString(t *testing.T) {
+	err := goerr.Wrap(goerr.Wrap(goerr.New("blue"), "orange"), "red")
+	assert.Equal(t, "red: orange: blue", err.Error())
+}