Require parameters to match exactly in SymbolTable for non-overwrite

2 files changed, 22 insertions, 1 deletions

diff --git a/output/negative/FailedOverride-error.java b/output/negative/FailedOverride-error.java
new file mode 100644
index 0000000..9ffac74
--- /dev/null
+++ b/output/negative/FailedOverride-error.java
@@ -0,0 +1,21 @@
+class FailedOverrride {
+    public static void main(String[] args) {
+        System.out.println(new A().init());
+    }
+}
+
+class A {
+    public int init() {
+        return 0;
+    }
+
+    public int x(A a) {
+        return 1;
+    }
+}
+
+class B extends A {
+    public int x(B a) {
+        return 2;
+    }
+}
diff --git a/st/SymbolTable.java b/st/SymbolTable.java
index 63832e6..0fca239 100644
--- a/st/SymbolTable.java
+++ b/st/SymbolTable.java
@@ -88,7 +88,7 @@ public class SymbolTable {
                                                                m.getName(),
                                                                cls.getName()));
                 for (int i = 0; i < actual.size(); ++i) {
-                    if (!expected.get(i).getClassInstance().equalsOnExtend(actual.get(i).getClassInstance())) {
+                    if (!expected.get(i).getClassInstance().equals(actual.get(i).getClassInstance())) {
                         throw new TypecheckException(String.format("SymbolTable found that %s is overwritten in %s!",
                                                                    m.getName(),
                                                                    cls.getName()));