Added setting position of generated nodes in javac's @Synchronized as a 'pilot' to see if we cause any problems with this approach. It does generate nicer error messages!

Example: Using @Synchronized with named lock on a static method, naming a non-existent or instance lock. That used to error on line -1.

src/core/lombok/javac/handlers/HandleSynchronized.java

@@ -78,16 +78,16 @@ public class HandleSynchronized extends JavacAnnotationHandler<Synchronized> {
 			lockName = isStatic ? STATIC_LOCK_NAME : INSTANCE_LOCK_NAME;
 		}
 		
-		TreeMaker maker = methodNode.getTreeMaker();
+		TreeMaker maker = methodNode.getTreeMaker().at(ast.pos);
 		
 		if (fieldExists(lockName, methodNode) == MemberExistsResult.NOT_EXISTS) {
 			if (!autoMake) {
 				annotationNode.addError("The field " + lockName + " does not exist.");
 				return;
 			}
-			JCExpression objectType = chainDots(methodNode, "java", "lang", "Object");
+			JCExpression objectType = chainDots(methodNode, ast.pos, "java", "lang", "Object");
 			//We use 'new Object[0];' because unlike 'new Object();', empty arrays *ARE* serializable!
-			JCNewArray newObjectArray = maker.NewArray(chainDots(methodNode, "java", "lang", "Object"),
+			JCNewArray newObjectArray = maker.NewArray(chainDots(methodNode, ast.pos, "java", "lang", "Object"),
 					List.<JCExpression>of(maker.Literal(Javac.getCtcInt(TypeTags.class, "INT"), 0)), null);
 			JCVariableDecl fieldDecl = recursiveSetGeneratedBy(maker.VarDef(
 					maker.Modifiers(Flags.PRIVATE | Flags.FINAL | (isStatic ? Flags.STATIC : 0)),
@@ -99,7 +99,7 @@ public class HandleSynchronized extends JavacAnnotationHandler<Synchronized> {
 		
 		JCExpression lockNode;
 		if (isStatic) {
-			lockNode = chainDots(methodNode, methodNode.up().getName(), lockName);
+			lockNode = chainDots(methodNode, ast.pos, methodNode.up().getName(), lockName);
 		} else {
 			lockNode = maker.Select(maker.Ident(methodNode.toName("this")), methodNode.toName(lockName));
 		}

src/core/lombok/javac/handlers/JavacHandlerUtil.java

@@ -746,6 +746,8 @@ public class JavacHandlerUtil {
 	 * In javac, dotted access of any kind, from {@code java.lang.String} to {@code var.methodName}
 	 * is represented by a fold-left of {@code Select} nodes with the leftmost string represented by
 	 * a {@code Ident} node. This method generates such an expression.
+	 * <p>
+	 * The position of the generated node(s) will be unpositioned (-1).
 	 * 
 	 * For example, maker.Select(maker.Select(maker.Ident(NAME[java]), NAME[lang]), NAME[String]).
 	 * 
@@ -753,12 +755,30 @@ public class JavacHandlerUtil {
 	 * @see com.sun.tools.javac.tree.JCTree.JCFieldAccess
 	 */
 	public static JCExpression chainDots(JavacNode node, String... elems) {
+		return chainDots(node, -1, elems);
+	}
+	
+	/**
+	 * In javac, dotted access of any kind, from {@code java.lang.String} to {@code var.methodName}
+	 * is represented by a fold-left of {@code Select} nodes with the leftmost string represented by
+	 * a {@code Ident} node. This method generates such an expression.
+	 * <p>
+	 * The position of the generated node(s) will be equal to the {@code pos} parameter.
+	 *
+	 * For example, maker.Select(maker.Select(maker.Ident(NAME[java]), NAME[lang]), NAME[String]).
+	 * 
+	 * @see com.sun.tools.javac.tree.JCTree.JCIdent
+	 * @see com.sun.tools.javac.tree.JCTree.JCFieldAccess
+	 */
+	public static JCExpression chainDots(JavacNode node, int pos, String... elems) {
 		assert elems != null;
 		assert elems.length > 0;
 		
-		JCExpression e = node.getTreeMaker().Ident(node.toName(elems[0]));
+		TreeMaker maker = node.getTreeMaker();
+		if (pos != -1) maker = maker.at(pos);
+		JCExpression e = maker.Ident(node.toName(elems[0]));
 		for (int i = 1 ; i < elems.length ; i++) {
-			e = node.getTreeMaker().Select(e, node.toName(elems[i]));
+			e = maker.Select(e, node.toName(elems[i]));
 		}
 		
 		return e;
@@ -776,7 +796,7 @@ public class JavacHandlerUtil {
 	 * @see com.sun.tools.javac.tree.JCTree.JCFieldAccess
 	 */
 	public static JCExpression chainDotsString(JavacNode node, String elems) {
-		return chainDots(node, elems.split("\\."));	
+		return chainDots(node, elems.split("\\."));
 	}
 	
 	/**

test/transform/resource/messages-delombok/SynchronizedNameStaticToInstanceRef.java.messages

@@ -1 +1 @@
--1:-1 ERROR non-static variable read cannot be referenced from a static context
+5:9 ERROR non-static variable read cannot be referenced from a static context