3 files changed, 36 insertions, 9 deletions
diff --git a/src/core/lombok/javac/handlers/NonNullHandler.java b/src/core/lombok/javac/handlers/HandleNonNull.java
index acf1588e..21611a39 100644
--- a/src/core/lombok/javac/handlers/NonNullHandler.java
+++ b/src/core/lombok/javac/handlers/HandleNonNull.java
@@ -36,21 +36,24 @@ import com.sun.tools.javac.tree.JCTree.JCLiteral;
 import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
 import com.sun.tools.javac.tree.JCTree.JCParens;
 import com.sun.tools.javac.tree.JCTree.JCStatement;
+import com.sun.tools.javac.tree.JCTree.JCSynchronized;
 import com.sun.tools.javac.tree.JCTree.JCThrow;
+import com.sun.tools.javac.tree.JCTree.JCTry;
 import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
 import com.sun.tools.javac.util.List;
 
 import lombok.NonNull;
 import lombok.core.AnnotationValues;
+import lombok.core.HandlerPriority;
 import lombok.core.AST.Kind;
 import lombok.javac.JavacAnnotationHandler;
 import lombok.javac.JavacNode;
-
 import static lombok.javac.JavacTreeMaker.TypeTag.*;
 import static lombok.javac.JavacTreeMaker.TreeTag.*;
 
 @ProviderFor(JavacAnnotationHandler.class)
-public class NonNullHandler extends JavacAnnotationHandler<NonNull> {
+@HandlerPriority(value = 512) // 2^9; onParameter=@__(@NonNull) has to run first.
+public class HandleNonNull extends JavacAnnotationHandler<NonNull> {
 	@Override public void handle(AnnotationValues<NonNull> annotation, JCAnnotation ast, JavacNode annotationNode) {
 		if (annotationNode.up().getKind() == Kind.FIELD) {
 			// This is meaningless unless the field is used to generate a method (@Setter, @RequiredArgsConstructor, etc),
@@ -77,7 +80,7 @@ public class NonNullHandler extends JavacAnnotationHandler<NonNull> {
 			return;
 		}
 		
-		if (JavacHandlerUtil.isGenerated(declaration)) return;
+//		if (JavacHandlerUtil.isGenerated(declaration)) return;
 		
 		if (declaration.body == null) {
 			annotationNode.addWarning("@NonNull is meaningless on a parameter of an abstract method.");
@@ -99,17 +102,33 @@ public class NonNullHandler extends JavacAnnotationHandler<NonNull> {
 		List<JCStatement> statements = declaration.body.stats;
 		
 		String expectedName = annotationNode.up().getName();
-		for (JCStatement stat : statements) {
-			if (JavacHandlerUtil.isConstructorCall(stat)) continue;
-			String varNameOfNullCheck = returnVarNameIfNullCheck(stat);
-			if (varNameOfNullCheck == null) break;
-			if (varNameOfNullCheck.equals(expectedName)) return;
+		
+		/* Abort if the null check is already there, delving into try and synchronized statements */ {
+			List<JCStatement> stats = statements;
+			int idx = 0;
+			while (stats.size() > idx) {
+				JCStatement stat = stats.get(idx++);
+				if (JavacHandlerUtil.isConstructorCall(stat)) continue;
+				if (stat instanceof JCTry) {
+					stats = ((JCTry) stat).body.stats;
+					idx = 0;
+					continue;
+				}
+				if (stat instanceof JCSynchronized) {
+					stats = ((JCSynchronized) stat).body.stats;
+					idx = 0;
+					continue;
+				}
+				String varNameOfNullCheck = returnVarNameIfNullCheck(stat);
+				if (varNameOfNullCheck == null) break;
+				if (varNameOfNullCheck.equals(expectedName)) return;
+			}
 		}
 		
 		List<JCStatement> tail = statements;
 		List<JCStatement> head = List.nil();
 		for (JCStatement stat : statements) {
-			if (JavacHandlerUtil.isConstructorCall(stat) || JavacHandlerUtil.isGenerated(stat)) {
+			if (JavacHandlerUtil.isConstructorCall(stat) || (JavacHandlerUtil.isGenerated(stat) && isNullCheck(stat))) {
 				tail = tail.tail;
 				head = head.prepend(stat);
 				continue;
@@ -122,6 +141,10 @@ public class NonNullHandler extends JavacAnnotationHandler<NonNull> {
 		declaration.body.stats = newList;
 	}
 	
+	private boolean isNullCheck(JCStatement stat) {
+		return returnVarNameIfNullCheck(stat) != null;
+	}
+	
 	/**
 	 * Checks if the statement is of the form 'if (x == null) {throw WHATEVER;},
 	 * where the block braces are optional. If it is of this form, returns "x".
diff --git a/src/core/lombok/javac/handlers/HandleSneakyThrows.java b/src/core/lombok/javac/handlers/HandleSneakyThrows.java
index 69d2b45d..b41277c3 100644
--- a/src/core/lombok/javac/handlers/HandleSneakyThrows.java
+++ b/src/core/lombok/javac/handlers/HandleSneakyThrows.java
@@ -29,6 +29,7 @@ import java.util.Collections;
 
 import lombok.SneakyThrows;
 import lombok.core.AnnotationValues;
+import lombok.core.HandlerPriority;
 import lombok.javac.JavacAnnotationHandler;
 import lombok.javac.JavacNode;
 import lombok.javac.JavacTreeMaker;
@@ -49,6 +50,7 @@ import com.sun.tools.javac.util.List;
  * Handles the {@code lombok.SneakyThrows} annotation for javac.
  */
 @ProviderFor(JavacAnnotationHandler.class)
+@HandlerPriority(value = 1024) // 2^10; @NonNull must have run first, so that we wrap around the statements generated by it.
 public class HandleSneakyThrows extends JavacAnnotationHandler<SneakyThrows> {
 	@Override public void handle(AnnotationValues<SneakyThrows> annotation, JCAnnotation ast, JavacNode annotationNode) {
 		deleteAnnotationIfNeccessary(annotationNode, SneakyThrows.class);
diff --git a/src/core/lombok/javac/handlers/HandleSynchronized.java b/src/core/lombok/javac/handlers/HandleSynchronized.java
index b173f8fb..661a7c2a 100644
--- a/src/core/lombok/javac/handlers/HandleSynchronized.java
+++ b/src/core/lombok/javac/handlers/HandleSynchronized.java
@@ -26,6 +26,7 @@ import static lombok.javac.handlers.JavacHandlerUtil.*;
 import lombok.Synchronized;
 import lombok.core.AST.Kind;
 import lombok.core.AnnotationValues;
+import lombok.core.HandlerPriority;
 import lombok.javac.JavacAnnotationHandler;
 import lombok.javac.JavacNode;
 import lombok.javac.JavacTreeMaker;
@@ -46,6 +47,7 @@ import com.sun.tools.javac.util.List;
  * Handles the {@code lombok.Synchronized} annotation for javac.
  */
 @ProviderFor(JavacAnnotationHandler.class)
+@HandlerPriority(value = 1024) // 2^10; @NonNull must have run first, so that we wrap around the statements generated by it.
 public class HandleSynchronized extends JavacAnnotationHandler<Synchronized> {
 	private static final String INSTANCE_LOCK_NAME = "$lock";
 	private static final String STATIC_LOCK_NAME = "$LOCK";