_.bind should throw a TypeError if func is not a function. [closes #213]

Former-commit-id: b6035736d9cb042b7fa4a9d0b7b4d9c6cb0ea4f8

dist/lodash.underscore.js

@@ -321,19 +321,24 @@
    * @param {Function|String} func The function to bind or the method name.
    * @param {Mixed} [thisArg] The `this` binding of `func`.
    * @param {Array} partialArgs An array of arguments to be partially applied.
-   * @param {Object} [rightIndicator] Used to indicate partially applying arguments from the right.
+   * @param {Object} [idicator] Used to indicate binding by key or partially
+   *  applying arguments from the right.
    * @returns {Function} Returns the new bound function.
    */
-  function createBound(func, thisArg, partialArgs, rightIndicator) {
+  function createBound(func, thisArg, partialArgs, indicator) {
     var isFunc = isFunction(func),
         isPartial = !partialArgs,
         key = thisArg;
 
     // juggle arguments
     if (isPartial) {
+      var rightIndicator = indicator;
       partialArgs = thisArg;
     }
-    if (!isFunc) {
+    else if (!isFunc) {
+      if (!indicator) {
+        throw new TypeError;
+      }
       thisArg = func;
     }