fix(eval): be able to throw protocol like errors (#4551)

lib/ExecutionContext.js

@@ -42,18 +42,10 @@ class ExecutionContext {
   /**
    * @param {Function|string} pageFunction
    * @param {...*} args
-   * @return {!Promise<(!Object|undefined)>}
+   * @return {!Promise<*>}
    */
   async evaluate(pageFunction, ...args) {
-    try {
+    return await this._evaluateInternal(true /* returnByValue */, pageFunction, ...args);
-      return await this._evaluateInternal(true /* returnByValue */, pageFunction, ...args);
-    } catch (error) {
-      if (error.message.includes('Object reference chain is too long'))
-        return;
-      if (error.message.includes('Object couldn\'t be returned by value'))
-        return;
-      throw error;
-    }
   }
 
   /**
@@ -66,9 +58,10 @@ class ExecutionContext {
   }
 
   /**
+   * @param {boolean} returnByValue
    * @param {Function|string} pageFunction
    * @param {...*} args
-   * @return {!Promise<!JSHandle>}
+   * @return {!Promise<*>}
    */
   async _evaluateInternal(returnByValue, pageFunction, ...args) {
     const suffix = `//# sourceURL=${EVALUATION_SCRIPT_URL}`;
@@ -165,6 +158,11 @@ class ExecutionContext {
      * @return {!Protocol.Runtime.evaluateReturnValue}
      */
     function rewriteError(error) {
+      if (error.message.includes('Object reference chain is too long'))
+        return {result: {type: 'undefined'}};
+      if (error.message.includes('Object couldn\'t be returned by value'))
+        return {result: {type: 'undefined'}};
+
       if (error.message.endsWith('Cannot find context with specified id'))
         throw new Error('Execution context was destroyed, most likely because of a navigation.');
       throw error;

test/evaluation.spec.js

@@ -182,6 +182,14 @@ module.exports.addTests = function({testRunner, expect}) {
       });
       expect(result).toBe(undefined);
     });
+    it_fails_ffox('should be able to throw a tricky error', async({page, server}) => {
+      const windowHandle = await page.evaluateHandle(() => window);
+      const errorText = await windowHandle.jsonValue().catch(e => e.message);
+      const error = await page.evaluate(errorText => {
+        throw new Error(errorText);
+      }, errorText).catch(e => e);
+      expect(error.message).toContain(errorText);
+    });
     it('should accept a string', async({page, server}) => {
       const result = await page.evaluate('1 + 2');
       expect(result).toBe(3);