From cc2f8feedc15a5c9f4e97e5323bc4df2aae8a2a7 Mon Sep 17 00:00:00 2001
From: Adam Barth <github@adambarth.com>
Date: Wed, 11 May 2016 18:25:56 -0700
Subject: [PATCH] Add asserts to DefaultTextStyle.inherit (#3844)

The context and child arguments are required.  We should assert that
they're non-null.

Fixes #3843
---
 packages/flutter/lib/src/widgets/basic.dart | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/flutter/lib/src/widgets/basic.dart b/packages/flutter/lib/src/widgets/basic.dart
index 26b179862d..fc7e18de85 100644
--- a/packages/flutter/lib/src/widgets/basic.dart
+++ b/packages/flutter/lib/src/widgets/basic.dart
@@ -1994,6 +1994,8 @@ class DefaultTextStyle extends InheritedWidget {
     TextOverflow overflow,
     Widget child
   }) {
+    assert(context != null);
+    assert(child != null);
     DefaultTextStyle parent = DefaultTextStyle.of(context);
     return new DefaultTextStyle(
       key: key,