From c3eaae90353d8e5a2003e8c6ed97b993d356f440 Mon Sep 17 00:00:00 2001
From: Oskar Eichler <62393985+OskarEichler@users.noreply.github.com>
Date: Sat, 29 Aug 2026 18:41:45 +0200
Subject: [PATCH] Handle coreless singleton definitions

---
 lib/rbs/definition_builder.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/rbs/definition_builder.rb b/lib/rbs/definition_builder.rb
index 715b417a9..13680f031 100644
--- a/lib/rbs/definition_builder.rb
+++ b/lib/rbs/definition_builder.rb
@@ -346,7 +346,7 @@ def build_singleton(type_name)
           if entry.is_a?(Environment::ClassEntry)
             new_method = definition.methods[:new]
 
-            if new_method.defs.all? {|d| d.defined_in == BuiltinNames::Class.name }
+            if new_method && new_method.defs.all? {|d| d.defined_in == BuiltinNames::Class.name }
               # The method is _untyped new_.
 
               alias_methods = definition.methods.each.with_object([]) do |entry, array|