From 873060e7e876605eaa1b7b82f524104ee670850d Mon Sep 17 00:00:00 2001
From: Daniel_Cortez <gromovstanislav@yandex.ru>
Date: Sat, 2 Dec 2017 19:02:17 +0700
Subject: [PATCH] emit/__emit: Do not allow to redefine the same label

---
 source/compiler/sc1.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/source/compiler/sc1.c b/source/compiler/sc1.c
index 3c0f282..670d455 100644
--- a/source/compiler/sc1.c
+++ b/source/compiler/sc1.c
@@ -6561,6 +6561,8 @@ SC_FUNC void emit_parse_line(void)
       error(221,st);    /* label name shadows tagname */
     } else {
       sym=fetchlab(st);
+      if ((sym->usage & uDEFINE)!=0)
+        error(021,st);  /* symbol already defined */
       setlabel((int)sym->addr);
       sym->usage|=uDEFINE;
     } /* if */