A Value panic during a FunctionCall is the same as a throw in JavaScript

error_test.go

@@ -13,3 +13,24 @@ func TestError_instanceof(t *testing.T) {
         (new TypeError()) instanceof Error
     `, "true")
 }
+
+func TestPanicValue(t *testing.T) {
+	Terst(t)
+
+	test := runTest()
+
+	failSet("abc", func(call FunctionCall) Value {
+		value, err := call.Otto.Run(`({ def: 3.14159 })`)
+		Is(err, nil)
+		panic(value)
+	})
+	test(`
+        try {
+            abc();
+        }
+        catch (err) {
+            error = err;
+        }
+        [ error instanceof Error, error.message, error.def ];
+    `, "false,,3.14159")
+}

runtime.go

@@ -202,23 +202,23 @@ func (self *_runtime) tryCatchEvaluate(inner func() Value) (resultValue Value, t
 				case resultThrow:
 					throw = true
 					throwValue = caught.Value
-					return
 				case resultReturn, resultBreak, resultContinue:
 					fallthrough
 				default:
 					other = &caught
-					return
 				}
 			case _error:
 				throw = true
 				throwValue = toValue(self.newError(caught.Name, caught.MessageValue()))
-				return
 			case *_syntaxError:
 				throw = true
 				throwValue = toValue(self.newError("SyntaxError", toValue(caught.Message)))
-				return
+			case Value:
+				throw = true
+				throwValue = caught
+			default:
+				panic(caught)
 			}
-			panic(caught)
 		}
 	}()