From 28bbe2acbd0064769be2f8efc7f64f05ba1e321e Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Tue, 18 Sep 2018 14:41:06 +0100
Subject: Made it so duplicating a label is an error.

---
 src/casm.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'src')

diff --git a/src/casm.c b/src/casm.c
index bec864b..f4b06e5 100644
--- a/src/casm.c
+++ b/src/casm.c
@@ -892,6 +892,28 @@ static void RunPass(const char *name, FILE *fp, int depth)
                 goto error_handling;
             }
 
+            if (IsFirstPass())
+            {
+                const Label *l;
+
+                if ((l = LabelFind(label, type)))
+                {
+                    if (l->type == GLOBAL_LABEL)
+                    {
+                        snprintf(err, sizeof err, "Global %s already defined",
+                                        label);
+                    }
+                    else
+                    {
+                        snprintf(err, sizeof err, "Local %s already defined",
+                                        label);
+                    }
+
+                    cmdstat = CMD_FAILED;
+                    goto error_handling;
+                }
+            }
+
             /* This may well be updated by a command, but easier to set anyway
             */
             if (options.address24)
-- 
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