1 files changed, 46 insertions, 0 deletions
diff --git a/tests/bugs/StackError.java b/tests/bugs/StackError.java
new file mode 100644
index 000000000..2b3a04a09
--- /dev/null
+++ b/tests/bugs/StackError.java
@@ -0,0 +1,46 @@
+import java.lang.reflect.Method;
+
+public class StackError {
+	public static void main(String args[]) {
+		new StackError().testEqualsNull();
+	}
+
+	void assertTrue(String msg, boolean b) {}
+
+	public void testEqualsNull() {
+		StackError one = new StackError();
+		StackError two = new StackError();
+		assertTrue("equal", one.equals(two));	// does not work
+		//boolean yes = one.equals(two);			// works
+	}
+	
+	public boolean equals(Object other) {
+		return true;
+	}
+}
+
+aspect EqualsContract {
+	pointcut equalsCall(Object thisOne, Object otherOne):
+		target(Object+) && 
+ 
+	target(thisOne) &&
+		call(public boolean equals(Object+)) &&
+		args(otherOne) &&
+		!within(EqualsContract);
+	
+	boolean around(Object thisOne, Object otherOne):
+	equalsCall(thisOne, otherOne) {
+		boolean result = proceed(thisOne, otherOne);
+		Class cls = thisOne.getClass();
+		String name = cls.getName();
+		boolean hasHashCode = false;
+		try {
+			Method m = cls.getDeclaredMethod("hashCode", null);
+			String lookFor = "public int " + name + ".hashCode()";
+			hasHashCode = lookFor.equals(m.toString());
+		}
+		catch (NoSuchMethodException nsme) {
+		}
+		return result;
+	}
+}