Fixes #3497

src/effects.js

@@ -591,7 +591,7 @@ jQuery.fn.extend( {
  for ( index = timers.length; index--; ) {
  if ( timers[ index ].elem === this && timers[ index ].queue === type ) {
  timers[ index ].anim.stop( true );
- lis.push(index);
+ lis.push( index );
  timers.splice( index, 1 );
  }
  }
@@ -633,27 +633,25 @@ jQuery.each( {
 } );
 
 jQuery.timers = [];
-old_length=0;
+var oldLength = 0;
 jQuery.fx.tick = function() {
  var timer,
  i = 0,
  timers = jQuery.timers;
 
  fxNow = jQuery.now();
- old_length = timers.length; 
-
+ oldLength = timers.length;
  for ( ; i < old_length; i++ ) {
- var removed_timers = 0;
+ var removedTimers = 0;
 
  for (var j = 0; j < lis.length; j++) {
- if(lis[j] <= i ){
- removed_timers++;
+ if (lis[ j ] <= i ) {
+ removeTimers++;
  }
- lis.splice(j,1);
-
- }
- i = i- removed_timers ;
- timer = timers[ i ];
+ lis.splice( j, 1 );
+ }
+ i = i - removedTimers;
+ timer = timers[ i ];
 
  // Checks the timer has not already been removed
  if ( !timer() && timers[ i ] === timer ) {