rdblue commented on code in PR #5287:
URL: https://github.com/apache/iceberg/pull/5287#discussion_r922542766


##########
core/src/main/java/org/apache/iceberg/SchemaParser.java:
##########
@@ -254,8 +254,8 @@ private static Types.MapType mapFromJson(JsonNode json) {
   }
 
   public static Schema fromJson(JsonNode json) {
-    Type type  = typeFromJson(json);
-    Preconditions.checkArgument(type.isNestedType() && 
type.asNestedType().isStructType(),
+    Type type = typeFromJson(json);
+    Preconditions.checkArgument(type != null && type.isNestedType() && 
type.asNestedType().isStructType(),

Review Comment:
   Sounds good to fix this one, but I think the Java changes should still go in 
a separate PR from the python ones.



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