From fe57394c1e68833206b9ee0f86b06afd99dc45e1 Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Thu, 5 Nov 2020 09:34:04 -0500
Subject: [PATCH] Fix invalid float with no leading integer

---
 ext/liquid_c/lexer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/liquid_c/lexer.c b/ext/liquid_c/lexer.c
index 9f391559..75e25bee 100644
--- a/ext/liquid_c/lexer.c
+++ b/ext/liquid_c/lexer.c
@@ -109,7 +109,7 @@ const char *lex_one(const char *start, const char *end, lexer_token_t *token)
         }
     }
 
-    if (ISDIGIT(c) || c == '-') {
+    if (ISDIGIT(c) || (c == '-' && str + 1 < end && ISDIGIT(str[1]))) {
         int has_dot = 0;
         cur = str;
         while (++cur < end) {