From b5ef018c867bf211799d12aafe0f0777b12ae631 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@ruby-lang.org>
Date: Tue, 24 Feb 2026 14:39:09 +0000
Subject: [PATCH] Fix missing ClassVariableWriteNode.new

---
 lib/typeprof/core/ast.rb                 |  1 +
 scenario/variable/cvar_operator_write.rb | 14 ++++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 scenario/variable/cvar_operator_write.rb

diff --git a/lib/typeprof/core/ast.rb b/lib/typeprof/core/ast.rb
index 46f41a8a7..887a8110a 100644
--- a/lib/typeprof/core/ast.rb
+++ b/lib/typeprof/core/ast.rb
@@ -132,6 +132,7 @@ def self.create_node(raw_node, lenv, use_result = true, allow_meta = false)
       when :class_variable_operator_write_node
         read = ClassVariableReadNode.new(raw_node, lenv)
         rhs = OperatorNode.new(raw_node, read, lenv)
+        ClassVariableWriteNode.new(raw_node, rhs, lenv)
       when :class_variable_or_write_node
         read = ClassVariableReadNode.new(raw_node, lenv)
         rhs = OrNode.new(raw_node, read, raw_node.value, lenv)
diff --git a/scenario/variable/cvar_operator_write.rb b/scenario/variable/cvar_operator_write.rb
new file mode 100644
index 000000000..f2e2ca490
--- /dev/null
+++ b/scenario/variable/cvar_operator_write.rb
@@ -0,0 +1,14 @@
+## update
+class Foo
+  @@count = 0
+
+  def increment
+    @@count += 1
+    @@count
+  end
+end
+
+## assert
+class Foo
+  def increment: -> Integer
+end