From 58777bcd930b1f4285a3d3ce879310dfd4b2e36b Mon Sep 17 00:00:00 2001
From: Michael Go <michael.go@shopify.com>
Date: Mon, 13 Jan 2025 17:13:27 -0400
Subject: [PATCH 1/2] float has to start with a digit

---
 lib/liquid/expression.rb            | 11 +++++++++--
 test/integration/expression_test.rb |  9 +++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/lib/liquid/expression.rb b/lib/liquid/expression.rb
index f2abb2fc1..979c34571 100644
--- a/lib/liquid/expression.rb
+++ b/lib/liquid/expression.rb
@@ -79,10 +79,17 @@ def parse_number(markup, ss)
         end
 
         ss.string = markup
-        # the first byte must be a digit, a period, or  a dash
+        # the first byte must be a digit or  a dash
         byte = ss.scan_byte
 
-        return false if byte != DASH && byte != DOT && (byte < ZERO || byte > NINE)
+        return false if byte != DASH && (byte < ZERO || byte > NINE)
+
+        if byte == DASH
+          peek_byte = ss.peek_byte
+
+          # if it starts with a dash, the next byte must be a digit
+          return false if peek_byte.nil? || !(peek_byte >= ZERO && peek_byte <= NINE)
+        end
 
         # The markup could be a float with multiple dots
         first_dot_pos = nil
diff --git a/test/integration/expression_test.rb b/test/integration/expression_test.rb
index 0eef5dc9d..29e456321 100644
--- a/test/integration/expression_test.rb
+++ b/test/integration/expression_test.rb
@@ -26,7 +26,16 @@ def test_int
   def test_float
     assert_template_result("-17.42", "{{ -17.42 }}")
     assert_template_result("2.5", "{{ 2.5 }}")
+    assert_expression_result(0.0, "0.....5")
+    assert_expression_result(0.0, "-0..1")
     assert_expression_result(1.5, "1.5")
+
+    # this is a unfortunate quirky behavior of Liquid
+    result = Expression.parse(".5")
+    assert_kind_of(Liquid::VariableLookup, result)
+
+    result = Expression.parse("-.5")
+    assert_kind_of(Liquid::VariableLookup, result)
   end
 
   def test_range

From 0639a094a8fb007d20a2a65f86163708df9eea89 Mon Sep 17 00:00:00 2001
From: Michael Go <michael.go@shopify.com>
Date: Mon, 13 Jan 2025 17:16:33 -0400
Subject: [PATCH 2/2] bump version to 5.6.2

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

diff --git a/lib/liquid/version.rb b/lib/liquid/version.rb
index 7c3004e50..ab7d74083 100644
--- a/lib/liquid/version.rb
+++ b/lib/liquid/version.rb
@@ -2,5 +2,5 @@
 # frozen_string_literal: true
 
 module Liquid
-  VERSION = "5.6.1"
+  VERSION = "5.6.2"
 end