Fail to generate when path including 'vendor'

[pelly-ryu]

Env

v2.9.0, macos

Problem

Mockery fails to generate mocks and outputs an empty file,
when a path including 'vendor' exists in the target interface's import statements.

Detail

note: the included package is not a 3rd party package vendored. there's db table named 'vendor' and /pkg/models/vendor pkg has ORM for it.

Example source

package hihi

import (
	vendorModel "github.com/<org>/<project>/pkg/models/vendor" // it's NOT 3rd party package
)

type Hihi interface {
	GetVendor() vendorModel.Vendor
}

Output

[10:26:59] → mockery --all
13 Sep 21 12:15 KST INF Starting mockery dry-run=false version=2.9.0
13 Sep 21 12:15 KST INF Walking dry-run=false version=2.9.0
13 Sep 21 12:15 KST INF Generating mock dry-run=false interface=Hihi qualified-name=github.com/<org>/<project>/pkg/services/hihi version=2.9.0
Between the lines is the file (mock.go) mockery generated in-memory but detected as invalid:
--------------------------------------------------------------------------------------------
// Code generated by mockery 2.9.0. DO NOT EDIT.

package mocks

import hihi "github.com/<org>/<project>/pkg/services/hihi"
import mock "github.com/stretchr/testify/mock"
import vendor "" // should be "github.com/<org>/<project>/pkg/models/vendor"

(...)
Error walking Hihi: mock.go:7:15: invalid import path: ""