From b65b723fa6c3594555289c681c08e5c52eac21cd Mon Sep 17 00:00:00 2001
From: Rangi <remy.oukaour+rangi42@gmail.com>
Date: Mon, 31 Aug 2020 15:37:19 -0400
Subject: [PATCH] Resolve #554: STRSUB("<N-char string>", N, 0) will not warn
 "Position N is past the end of the string"

---
 src/asm/asmy.y | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/asm/asmy.y b/src/asm/asmy.y
index 0cfcfc3f..89f50fe8 100644
--- a/src/asm/asmy.y
+++ b/src/asm/asmy.y
@@ -461,7 +461,7 @@ static void strsubUTF8(char *dest, const char *src, uint32_t pos, uint32_t len)
 		srcIndex++;
 	}
 
-	if (!src[srcIndex])
+	if (!src[srcIndex] && len)
 		warning(WARNING_BUILTIN_ARG, "STRSUB: Position %lu is past the end of the string",
 			(unsigned long)pos);