195090: ajc$ local vars that aren't used getting reported when using -warn:+unusedArgument

tests/bugs164/pr195090.java

@@ -0,0 +1,19 @@
+/**
+ * Helper interface.
+ */
+interface Interface{
+        boolean methodToBeImplemented();
+}
+
+/**
+ * Exposes the ajc$this_ is never read warning.
+ */
+public aspect pr195090 {
+        public boolean Interface.methodToBeImplemented() {
+                return returnTrue();
+        }
+
+        public static boolean returnTrue() {
+                return true;
+        }
+}

tests/src/org/aspectj/systemtest/ajc164/Ajc164Tests.java

@@ -24,13 +24,17 @@ import org.aspectj.testing.XMLBasedAjcTestCase;
 
 public class Ajc164Tests extends org.aspectj.testing.XMLBasedAjcTestCase {
 
+	public void testAjcThisNotRead() {
+		runTest("ajcthis not read");
+	}
+
 	public void testRecursiveCflow() {
 		runTest("recursive cflow");
 	}
 
-	//public void testAopConfig1() {
-	//	runTest("aop config - 1");
-	//}
+	// public void testAopConfig1() {
+	// runTest("aop config - 1");
+	// }
 
 	public void testAnnoDecprecedence_pr256779() {
 		runTest("anno decprecedence");

tests/src/org/aspectj/systemtest/ajc164/ajc164.xml

@@ -8,6 +8,11 @@
       </compile>
     </ajc-test>
     
+    <ajc-test dir="bugs164" title="ajcthis not read">
+      <compile files="pr195090.java" options="-1.5 -warn:+unusedArgument">
+      </compile>
+    </ajc-test>
+    
     <ajc-test dir="bugs164/pr256779" title="anno decprecedence">
       <compile files="ThisAspect.java OtherAspect.java" options="-1.5"/>
       <run class="com.ThisAspect" ltw="aop.xml"/>