Fix NPE when coercing a null into a String

Hellblazer · Hellblazer · commit b7dd0314e874 · 2015-09-05T16:53:48.000-07:00
diff --git a/src/main/java/graphql/Scalars.java b/src/main/java/graphql/Scalars.java
@@ -73,7 +73,7 @@ public Object coerceLiteral(Object input) {
     public static GraphQLScalarType GraphQLString = new GraphQLScalarType("String", "Built-in String", new Coercing() {
         @Override
         public Object coerce(Object input) {
-            return input.toString();
+            return input == null ? null : input.toString();
         }
 
         @Override

Original file line number	Diff line number	Diff line change
`@@ -73,7 +73,7 @@ public Object coerceLiteral(Object input) {`
`73`	`73`	`public static GraphQLScalarType GraphQLString = new GraphQLScalarType("String", "Built-in String", new Coercing() {`
`74`	`74`	`@Override`
`75`	`75`	`public Object coerce(Object input) {`
`76`		`- return input.toString();`
	`76`	`+ return input == null ? null : input.toString();`
`77`	`77`	`}`
`78`	`78`
`79`	`79`	`@Override`