From fd1996fc83d4b2ab3d8d090ad99af1767fbbcaee Mon Sep 17 00:00:00 2001
From: Jesusaves <cpntb1@ymail.com>
Date: Sun, 11 Apr 2021 10:59:00 -0300
Subject: CI bug cannot be reproduced; Appeal to fancy debug

---
 src/map/script.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/map/script.c b/src/map/script.c
index 498a0ec1e..7cfb43d2d 100644
--- a/src/map/script.c
+++ b/src/map/script.c
@@ -4416,7 +4416,7 @@ static void op_2num(struct script_state *st, int op, int i1, int i2)
 	case C_LT:      ret = (i1 <  i2); break;
 	case C_LE:      ret = (i1 <= i2); break;
 	case C_R_SHIFT: ret = i1>>i2;     break;
-	case C_L_SHIFT: ret = i1<<i2;     break;
+	case C_L_SHIFT: if (i2 < 0) { ShowError("Invalid left shift op=%s i1=%d i2=%d\n", script->op2name(op), i1, i2); script->reportsrc(st); script_pushnil(st); st->state = END; return; } ret = i1<<i2;     break;
 	case C_DIV:
 	case C_MOD:
 		if( i2 == 0 )
-- 
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