fix: postMessage crash with invalid transferrable (#46639)

spec/api-ipc-spec.ts

@@ -236,6 +236,23 @@ describe('ipc module', () => {
       expect(ev.senderFrame.routingId).to.equal(w.webContents.mainFrame.routingId);
     });
 
+    it('throws when the transferable is invalid', async () => {
+      const w = new BrowserWindow({ show: false, webPreferences: { nodeIntegration: true, contextIsolation: false } });
+      w.loadURL('about:blank');
+      const p = once(ipcMain, 'port');
+      await w.webContents.executeJavaScript(`(${function () {
+        try {
+          const buffer = new ArrayBuffer(10);
+          // @ts-expect-error
+          require('electron').ipcRenderer.postMessage('port', '', [buffer]);
+        } catch (e) {
+          require('electron').ipcRenderer.postMessage('port', { error: (e as Error).message });
+        }
+      }})()`);
+      const [, msg] = await p;
+      expect(msg.error).to.eql('Invalid value for transfer');
+    });
+
     it('can communicate between main and renderer', async () => {
       const w = new BrowserWindow({ show: false, webPreferences: { nodeIntegration: true, contextIsolation: false } });
       w.loadURL('about:blank');
@@ -411,6 +428,20 @@ describe('ipc module', () => {
         expect(port2).not.to.be.null();
       });
 
+      it('should not throw when supported values are passed as message', () => {
+        const { port1 } = new MessageChannelMain();
+
+        // @ts-expect-error - this shouldn't crash.
+        expect(() => { port1.postMessage(); }).to.not.throw();
+
+        expect(() => { port1.postMessage(undefined); }).to.not.throw();
+        expect(() => { port1.postMessage(42); }).to.not.throw();
+        expect(() => { port1.postMessage(false); }).to.not.throw();
+        expect(() => { port1.postMessage([]); }).to.not.throw();
+        expect(() => { port1.postMessage('hello'); }).to.not.throw();
+        expect(() => { port1.postMessage({ hello: 'goodbye' }); }).to.not.throw();
+      });
+
       it('throws an error when an invalid parameter is sent to postMessage', () => {
         const { port1 } = new MessageChannelMain();