From b2de3a705bfad5db2b0779ad62dd0bd58bcf3437 Mon Sep 17 00:00:00 2001
From: Adam Barth <abarth@chromium.org>
Date: Tue, 25 Aug 2015 09:48:21 -0700
Subject: [PATCH] Don't divide by zero

If there aren't any items, there's no point in computing which items to show.
---
 packages/flutter/lib/widgets/scrollable.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/flutter/lib/widgets/scrollable.dart b/packages/flutter/lib/widgets/scrollable.dart
index ffa77feede..921ef0ca75 100644
--- a/packages/flutter/lib/widgets/scrollable.dart
+++ b/packages/flutter/lib/widgets/scrollable.dart
@@ -439,7 +439,7 @@ abstract class ScrollableWidgetList extends Scrollable {
     int itemShowCount = 0;
     Offset viewportOffset = Offset.zero;
 
-    if (_containerExtent != null && _containerExtent > 0.0) {
+    if (_containerExtent != null && _containerExtent > 0.0 && itemCount > 0) {
       if (paddedScrollOffset < scrollBehavior.minScrollOffset) {
         // Underscroll
         double visibleExtent = _containerExtent + paddedScrollOffset;