From 46fd63da5f149f5c6485dfc26982a9e2b5651a48 Mon Sep 17 00:00:00 2001
From: Dylan Thacker-Smith <Dylan.Smith@shopify.com>
Date: Mon, 19 Oct 2020 12:07:39 -0400
Subject: [PATCH] Fix strict parsing of find variable with a name expression

---
 lib/liquid/parser.rb              | 5 +++++
 test/integration/variable_test.rb | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/lib/liquid/parser.rb b/lib/liquid/parser.rb
index b43576e..609601a 100644
--- a/lib/liquid/parser.rb
+++ b/lib/liquid/parser.rb
@@ -52,6 +52,11 @@ module Liquid
       when :id
         str = consume
         str << variable_lookups
+      when :open_square
+        str = consume
+        str << expression
+        str << consume(:close_square)
+        str << variable_lookups
       when :string, :number
         consume
       when :open_round
diff --git a/test/integration/variable_test.rb b/test/integration/variable_test.rb
index 45268bd..168f43a 100644
--- a/test/integration/variable_test.rb
+++ b/test/integration/variable_test.rb
@@ -95,4 +95,8 @@ class VariableTest < Minitest::Test
   def test_render_symbol
     assert_template_result('bar', '{{ foo }}', 'foo' => :bar)
   end
+
+  def test_dynamic_find_var
+    assert_template_result('bar', '{{ [key] }}', 'key' => 'foo', 'foo' => 'bar')
+  end
 end