Test invalid floats

Gemfile

@@ -22,6 +22,6 @@ group :test do
   gem 'rubocop-performance', require: false
 
   platform :mri, :truffleruby do
-    gem 'liquid-c', github: 'Shopify/liquid-c', ref: 'master'
+    gem 'liquid-c', github: 'Shopify/liquid-c', ref: 'pz-fix-invalid-float'
   end
 end

test/integration/parsing_quirks_test.rb

@@ -131,4 +131,16 @@ class ParsingQuirksTest < Minitest::Test
   def test_contains_in_id
     assert_template_result(' YES ', '{% if containsallshipments == true %} YES {% endif %}', 'containsallshipments' => true)
   end
+
+  def test_invalid_float_with_no_leading_integer
+    with_error_mode(:lax) do
+      assert_template_result("", "{{ -.1 }}")
+      assert_template_result("", "{{ .1 }}")
+    end
+
+    with_error_mode(:strict) do
+      assert_raises(SyntaxError) { Template.parse("{{ -.1 }}") }
+      assert_raises(SyntaxError) { Template.parse("{{ .1 }}") }
+    end
+  end
 end # ParsingQuirksTest