From 2a40b613252eb3d7a95624957dca61fdfa30dc2a Mon Sep 17 00:00:00 2001
From: bd-912 <bdunahu@colostate.edu>
Date: Sat, 11 May 2024 15:14:07 -0600
Subject: Fix three more bugs related to st

---
 st/SymbolTable.java | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'st/SymbolTable.java')

diff --git a/st/SymbolTable.java b/st/SymbolTable.java
index 0fca239..fa196e3 100644
--- a/st/SymbolTable.java
+++ b/st/SymbolTable.java
@@ -52,6 +52,10 @@ public class SymbolTable {
         ClassInstance cls = (ClassInstance) this.active.get(TypeEnum.classname);
         ClassInstance ext = this.getClass(arg);
 
+        if (ext == null)
+            throw new TypecheckException(String.format("There is no %s to extend!",
+                                                       arg));
+
         MinimalLogger.info(String.format("%s found to extend %s",
                                          cls.getName(),
                                          ext.getName()));
-- 
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