Fix for Bugzilla Bug 49638 exception logging: after() throwing advice can't convert Throwable obj to string and ajc aborts

org.aspectj.ajdt.core/src/org/aspectj/ajdt/internal/compiler/parser/AjParser.java

@@ -737,7 +737,12 @@ public class AjParser extends Parser {
 	    } else if (CharOperation.equals(name, "returning".toCharArray())) {
 	    	adviceDecl.kind = AdviceKind.AfterReturning;
 	    } else {
-	    	//XXX illegal name here
+			problemReporter().parseError(
+				start, 
+				end, 
+				name, 
+				String.valueOf(name), 
+				new String[] {"throwing", "returning", ":"}); 
 	    }
 	}
 

tests/ajcTests.xml

@@ -6897,5 +6897,16 @@
 			</message>
 		</compile>
 	</ajc-test>
-   
+
+	<ajc-test dir="bugs"
+		title="Appropriate message for 'after() thowing(Throwable th)' syntax error"
+		pr="49638"
+		>
+		<compile 
+			files="AfterThrowingAdviceSyntaxError.java" >
+			<message kind="error" line="21" />
+			<message kind="error" line="23" />
+		</compile>
+	</ajc-test>
+    
 </suite>

tests/bugs/AfterThrowingAdviceSyntaxError.java

@@ -0,0 +1,28 @@
+import org.aspectj.lang.*;
+
+public class AfterThrowingAdviceSyntaxError {
+
+	public static void main(String[] args) {
+		perform();
+	}
+
+	private static void perform() {
+		Object nullObj = null;
+		nullObj.toString();
+	}
+}
+
+aspect ExceptionLoggerAspectV2 
+{
+
+	pointcut exceptionLogMethods()
+		: call(* *.*(..)) && !within(ExceptionLoggerAspectV2);
+
+	after() thowing(Throwable ex) : exceptionLogMethods() {
+		Signature sig = thisJoinPointStaticPart.getSignature();
+		System.out.printl("WARNING: " 
+			+ sig.getDeclaringType().getName() + " "
+			+ sig.getName() + " "
+			+ "Exception logger aspect " + ex);
+	}
+}