From 2709a70225e0369c310c0e0d71730fa3448556d7 Mon Sep 17 00:00:00 2001
From: Lauri Svan <lauri.svan@rescomms.com>
Date: Fri, 10 May 2024 17:32:11 +0300
Subject: [PATCH] Avoid unnecessary null pointer exception if reference schema
 is given

---
 lib/src/json_schema/json_schema.dart | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/src/json_schema/json_schema.dart b/lib/src/json_schema/json_schema.dart
index 7c92d06d..c8cc02f4 100644
--- a/lib/src/json_schema/json_schema.dart
+++ b/lib/src/json_schema/json_schema.dart
@@ -305,7 +305,10 @@ class JsonSchema {
       _customFormats = customFormats;
       _rootMemomizedPathResults = {};
       try {
-        _fetchedFromUriBase = JsonSchemaUtils.getBaseFromFullUri(_fetchedFromUri!);
+        // Only fetch the base if given
+        if (_fetchedFromUri != null) {
+          _fetchedFromUriBase = JsonSchemaUtils.getBaseFromFullUri(_fetchedFromUri!);
+        }
       } catch (e) {
         // ID base can't be set for schemes other than HTTP(S).
         // This is expected behavior.