position now set for all code generated by javac handlers;

this also solves the AssertionError in the Bits class on javac8-ea.

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

@@ -97,6 +97,7 @@ public class JavacHandlerUtil {
 		}
 		
 		@Override public void scan(JCTree tree) {
+			if (tree == null) return;
 			setGeneratedBy(tree, source);
 			super.scan(tree);
 		}
@@ -134,10 +135,12 @@ public class JavacHandlerUtil {
 	}
 	
 	public static <T extends JCTree> T setGeneratedBy(T node, JCTree source) {
+		if (node == null) return null;
 		synchronized (generatedNodes) {
 			if (source == null) generatedNodes.remove(node);
 			else generatedNodes.put(node, new WeakReference<JCTree>(source));
 		}
+		if (source != null) node.pos = source.pos;
 		return node;
 	}
 	

src/delombok/lombok/delombok/Delombok.java

@@ -30,6 +30,7 @@ import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.PrintStream;
 import java.io.Writer;
+import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.net.URI;
@@ -49,6 +50,7 @@ import javax.tools.JavaFileObject;
 import lombok.Lombok;
 import lombok.javac.CommentCatcher;
 import lombok.javac.LombokOptions;
+import lombok.javac.apt.Processor;
 
 import com.sun.tools.javac.comp.Todo;
 import com.sun.tools.javac.main.JavaCompiler;
@@ -363,7 +365,7 @@ public class Delombok {
 		if (classpath != null) options.putJavacOption("CLASSPATH", classpath);
 		if (sourcepath != null) options.putJavacOption("SOURCEPATH", sourcepath);
 		if (bootclasspath != null) options.putJavacOption("BOOTCLASSPATH", bootclasspath);
-		options.put("compilePolicy", "attr");
+		options.put("compilePolicy", "check");
 		
 		CommentCatcher catcher = CommentCatcher.create(context);
 		JavaCompiler compiler = catcher.getCompiler();
@@ -374,10 +376,7 @@ public class Delombok {
 		compiler.initProcessAnnotations(Collections.singleton(new lombok.javac.apt.Processor()));
 		
 		for (File fileToParse : filesToParse) {
-			
-			@SuppressWarnings("deprecation")
-			JCCompilationUnit unit = compiler.parse(fileToParse.getAbsolutePath());
-			
+			@SuppressWarnings("deprecation") JCCompilationUnit unit = compiler.parse(fileToParse.getAbsolutePath());
 			baseMap.put(unit, fileToBase.get(fileToParse));
 			roots.add(unit);
 		}
@@ -386,8 +385,13 @@ public class Delombok {
 			return false;
 		}
 		
-		JavaCompiler delegate = compiler.processAnnotations(compiler.enterTrees(toJavacList(roots)));
-		callFlowMethodOnJavaCompiler(delegate, callAttributeMethodOnJavaCompiler(delegate, delegate.todo));
+		com.sun.tools.javac.util.List<JCCompilationUnit> trees = compiler.enterTrees(toJavacList(roots));
+		
+		JavaCompiler delegate = compiler.processAnnotations(trees);
+		
+		Object care = callAttributeMethodOnJavaCompiler(delegate, delegate.todo);
+		
+		callFlowMethodOnJavaCompiler(delegate, care);
 		for (JCCompilationUnit unit : roots) {
 			DelombokResult result = new DelombokResult(catcher.getComments(unit), unit, force || options.isChanged(unit));
 			if (verbose) feedback.printf("File: %s [%s]\n", unit.sourcefile.getName(), result.isChanged() ? "delomboked" : "unchanged");