Fixed issue 164. Oh yes. Party time!

skipPrintAst was a singleton global, so, yes, thread race issues all over the place.

src/core/lombok/eclipse/EclipseNode.java

@@ -111,7 +111,7 @@ public void traverse(EclipseASTVisitor visitor) {
 				visitor.visitAnnotationOnLocal((LocalDeclaration)parent.get(), this, (Annotation)get());
 				break;
 			default:
-				throw new AssertionError("Annotion not expected as child of a " + up().getKind());
+				throw new AssertionError("Annotation not expected as child of a " + up().getKind());
 			}
 			break;
 		case STATEMENT:

src/core/lombok/eclipse/HandlerLibrary.java

@@ -89,8 +89,6 @@ public boolean deferUntilPostDiet() {
 
 	private Collection<EclipseASTVisitor> visitorHandlers = new ArrayList<EclipseASTVisitor>();
 
-	private boolean skipPrintAST;
-
 	/**
 	 * Creates a new HandlerLibrary.  Errors will be reported to the Eclipse Error log.
 	 * then uses SPI discovery to load all annotation and visitor based handlers so that future calls
@@ -170,16 +168,17 @@ private boolean needsHandling(ASTNode node) {
 	 * @param annotationNode The Lombok AST Node representing the Annotation AST Node.
 	 * @param annotation 'node.get()' - convenience parameter.
 	 */
-	public void handleAnnotation(CompilationUnitDeclaration ast, EclipseNode annotationNode, org.eclipse.jdt.internal.compiler.ast.Annotation annotation) {
+	public void handleAnnotation(CompilationUnitDeclaration ast, EclipseNode annotationNode, org.eclipse.jdt.internal.compiler.ast.Annotation annotation, boolean skipPrintAst) {
 		String pkgName = annotationNode.getPackageDeclaration();
 		Collection<String> imports = annotationNode.getImportStatements();
 
 		TypeResolver resolver = new TypeResolver(typeLibrary, pkgName, imports);
 		TypeReference rawType = annotation.type;
 		if (rawType == null) return;
+
 		for (String fqn : resolver.findTypeMatches(annotationNode, toQualifiedName(annotation.type.getTypeName()))) {
 			boolean isPrintAST = fqn.equals(PrintAST.class.getName());
-			if (isPrintAST == skipPrintAST) continue;
+			if (isPrintAST == skipPrintAst) continue;
 			AnnotationHandlerContainer<?> container = annotationHandlers.get(fqn);
 
 			if (container == null) continue;
@@ -209,20 +208,4 @@ public void callASTVisitors(EclipseAST ast) {
 					String.format("Lombok visitor handler %s failed", visitor.getClass()), t);
 		}
 	}
-
-	/**
-	 * Lombok does not currently support triggering annotations in a specified order; the order is essentially
-	 * random right now. This lack of order is particularly annoying for the {@code PrintAST} annotation,
-	 * which is almost always intended to run last. Hence, this hack, which lets it in fact run last.
-	 * 
-	 * @see #skipAllButPrintAST()
-	 */
-	public void skipPrintAST() {
-		skipPrintAST = true;
-	}
-
-	/** @see #skipPrintAST() */
-	public void skipAllButPrintAST() {
-		skipPrintAST = false;
-	}
 }

src/core/lombok/eclipse/TransformEclipseAST.java

@@ -163,41 +163,45 @@ public TransformEclipseAST(EclipseAST ast) {
 	 * then handles any PrintASTs.
 	 */
 	public void go() {
-		handlers.skipPrintAST();
-		ast.traverse(new AnnotationVisitor());
+		ast.traverse(new AnnotationVisitor(true));
 		handlers.callASTVisitors(ast);
-		handlers.skipAllButPrintAST();
-		ast.traverse(new AnnotationVisitor());
+		ast.traverse(new AnnotationVisitor(false));
 	}
 
 	private static class AnnotationVisitor extends EclipseASTAdapter {
+		private final boolean skipPrintAst;
+
+		public AnnotationVisitor(boolean skipAllButPrintAST) {
+			this.skipPrintAst = skipAllButPrintAST;
+		}
+
 		public boolean deferUntilPostDiet() {
 			return false;
 		}
 
 		@Override public void visitAnnotationOnField(FieldDeclaration field, EclipseNode annotationNode, Annotation annotation) {
 			CompilationUnitDeclaration top = (CompilationUnitDeclaration) annotationNode.top().get();
-			handlers.handleAnnotation(top, annotationNode, annotation);
+			handlers.handleAnnotation(top, annotationNode, annotation, skipPrintAst);
 		}
 
 		@Override public void visitAnnotationOnMethodArgument(Argument arg, AbstractMethodDeclaration method, EclipseNode annotationNode, Annotation annotation) {
 			CompilationUnitDeclaration top = (CompilationUnitDeclaration) annotationNode.top().get();
-			handlers.handleAnnotation(top, annotationNode, annotation);
+			handlers.handleAnnotation(top, annotationNode, annotation, skipPrintAst);
 		}
 
 		@Override public void visitAnnotationOnLocal(LocalDeclaration local, EclipseNode annotationNode, Annotation annotation) {
 			CompilationUnitDeclaration top = (CompilationUnitDeclaration) annotationNode.top().get();
-			handlers.handleAnnotation(top, annotationNode, annotation);
+			handlers.handleAnnotation(top, annotationNode, annotation, skipPrintAst);
 		}
 
 		@Override public void visitAnnotationOnMethod(AbstractMethodDeclaration method, EclipseNode annotationNode, Annotation annotation) {
 			CompilationUnitDeclaration top = (CompilationUnitDeclaration) annotationNode.top().get();
-			handlers.handleAnnotation(top, annotationNode, annotation);
+			handlers.handleAnnotation(top, annotationNode, annotation, skipPrintAst);
 		}
 
 		@Override public void visitAnnotationOnType(TypeDeclaration type, EclipseNode annotationNode, Annotation annotation) {
 			CompilationUnitDeclaration top = (CompilationUnitDeclaration) annotationNode.top().get();
-			handlers.handleAnnotation(top, annotationNode, annotation);
+			handlers.handleAnnotation(top, annotationNode, annotation, skipPrintAst);
 		}
 	}
 }

src/core/lombok/eclipse/handlers/EclipseHandlerUtil.java

@@ -25,7 +25,6 @@
 
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
-import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
 import java.lang.reflect.Modifier;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -38,7 +37,6 @@
 import lombok.Lombok;
 import lombok.core.AnnotationValues;
 import lombok.core.AST.Kind;
-import lombok.core.debug.DebugSnapshotStore;
 import lombok.core.handlers.TransformationsUtil;
 import lombok.eclipse.Eclipse;
 import lombok.eclipse.EclipseNode;
@@ -451,27 +449,6 @@ public static void injectMethod(EclipseNode type, AbstractMethodDeclaration meth
 		method.annotations = createSuppressWarningsAll(method, method.annotations);
 		TypeDeclaration parent = (TypeDeclaration) type.get();
 
-		if (parent.scope != null && method.scope == null) {
-			// We think this means heisenbug #164 is about to happen later in some other worker thread.
-			// To improve our ability to figure out what the heck is going on, let's generate a log so we can ask those who stumble on this about it,
-			// and thus see a far more useful stack trace.
-			boolean report = true;
-			for (StackTraceElement elem : Thread.currentThread().getStackTrace()) {
-				// We intentionally hook into the middle of ClassScope filling in BlockScopes for PatchDelegate,
-				// meaning that will trigger a false positive. Detect it and do not report the occurence of #164 if so.
-				if ("lombok.eclipse.agent.PatchDelegate".equals(elem.getClassName())) {
-					report = false;
-					break;
-				}
-			}
-
-			if (report) {
-				CompilationUnitDeclaration cud = (CompilationUnitDeclaration) type.top().get();
-				String logFileLocation = DebugSnapshotStore.INSTANCE.print(cud, "Printing: injecting whilst scope is already built.");
-				Eclipse.warning("We believe you may have stumbled on issue 164. Please upload file " + logFileLocation + " to: http://code.google.com/p/projectlombok/issues/detail?id=164", new Throwable());
-			}
-		}
-
 		if (parent.methods == null) {
 			parent.methods = new AbstractMethodDeclaration[1];
 			parent.methods[0] = method;

src/eclipseAgent/lombok/eclipse/agent/EclipsePatcher.java

@@ -21,15 +21,11 @@
  */
 package lombok.eclipse.agent;
 
-import java.lang.instrument.ClassFileTransformer;
-import java.lang.instrument.IllegalClassFormatException;
 import java.lang.instrument.Instrumentation;
-import java.security.ProtectionDomain;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 
-import lombok.bytecode.ClassFileMetaData;
 import lombok.core.Agent;
 import lombok.patcher.Hook;
 import lombok.patcher.MethodTarget;
@@ -72,15 +68,6 @@ public void runAgent(String agentArgs, Instrumentation instrumentation, boolean
 		else ecj = injected;
 
 		registerPatchScripts(instrumentation, injected, ecj);
-		instrumentation.addTransformer(new ClassFileTransformer() {
-			@Override public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
-				ClassFileMetaData meta = new ClassFileMetaData(classfileBuffer);
-				if (meta.usesField("org/eclipse/jdt/internal/compiler/ast/TypeDeclaration", "scope")) {
-					return Issue164Fixer.fix(classfileBuffer);
-				}
-				return null;
-			}
-		}, true);
 	}
 
 	private static void registerPatchScripts(Instrumentation instrumentation, boolean reloadExistingClasses, boolean ecjOnly) {