fix: destroy WebContents synchronously on shutdown (#15541)

spec/api-web-contents-view-spec.js

@@ -1,8 +1,18 @@
 'use strict'
 
 const assert = require('assert')
+const chai = require('chai')
+const ChildProcess = require('child_process')
+const dirtyChai = require('dirty-chai')
+const path = require('path')
+const { emittedOnce } = require('./events-helpers')
 const { closeWindow } = require('./window-helpers')
-const { webContents, TopLevelWindow, WebContentsView } = require('electron').remote
+
+const { remote } = require('electron')
+const { webContents, TopLevelWindow, WebContentsView } = remote
+
+const { expect } = chai
+chai.use(dirtyChai)
 
 describe('WebContentsView', () => {
   let w = null
@@ -22,4 +32,14 @@ describe('WebContentsView', () => {
       w.setContentView(new WebContentsView(web))
     }, /The WebContents has already been added to a View/)
   })
+
+  describe('new WebContentsView()', () => {
+    it('does not crash on exit', async () => {
+      const appPath = path.join(__dirname, 'fixtures', 'api', 'leak-exit-webcontentsview.js')
+      const electronPath = remote.getGlobal('process').execPath
+      const appProcess = ChildProcess.spawn(electronPath, [appPath])
+      const [code] = await emittedOnce(appProcess, 'close')
+      expect(code).to.equal(0)
+    })
+  })
 })