diff --git a/.gitignore b/.gitignore
index d3c9a94..72762e9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 
 # Working folder of ant build script
 /build/
+# Generated poms
+/maven/poms/**/pom.xml
diff --git a/dev/build.xml b/dev/build.xml
index 263e641..9c13138 100755
--- a/dev/build.xml
+++ b/dev/build.xml
@@ -74,11 +74,11 @@
           <include name="apache/tapestry-util-text-4.0.2.jar"/>
           <include name="apache/ant-1.6.5.jar"/>
           <include name="colt/colt-1.2.jar"/>
-          <include name="eclipse/org.eclipse.jdt.core_3.13.102-CUSTOM-GWT-20180415.jar"/>
-          <include name="eclipse/jdtCompilerAdapter_3.13.102-CUSTOM-GWT-20180415.jar"/>
-          <include name="objectweb/asm-6.1.1/asm-6.1.1.jar"/>
-          <include name="objectweb/asm-6.1.1/asm-commons-6.1.1.jar"/>
-          <include name="objectweb/asm-6.1.1/asm-util-6.1.1.jar"/>
+          <include name="eclipse/org.eclipse.jdt.core_3.17.0.v20190306-2240.jar"/>
+          <include name="eclipse/jdtCompilerAdapter_3.17.0.v20190306-2240.jar"/>
+          <include name="objectweb/asm-7.1/asm-7.1.jar"/>
+          <include name="objectweb/asm-7.1/asm-commons-7.1.jar"/>
+          <include name="objectweb/asm-7.1/asm-util-7.1.jar"/>
           <include name="guava/guava-19.0/guava-19.0-rebased.jar"/>
           <include name="icu4j/63.1/icu4j.jar"/>
           <include name="jetty/jetty-9.2.14.v20151106/jetty-all-9.2.14.v20151106.jar"/>
@@ -128,16 +128,16 @@
             <provider classname="org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer"/>
             <provider classname="org.eclipse.jetty.apache.jsp.JettyJasperInitializer"/>
           </service>
-          <zipfileset src="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-6.1.1.jar"/>
-          <zipfileset src="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-commons-6.1.1.jar"/>
-          <zipfileset src="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-util-6.1.1.jar"/>
+          <zipfileset src="${gwt.tools.lib}/objectweb/asm-7.1/asm-7.1.jar"/>
+          <zipfileset src="${gwt.tools.lib}/objectweb/asm-7.1/asm-commons-7.1.jar"/>
+          <zipfileset src="${gwt.tools.lib}/objectweb/asm-7.1/asm-util-7.1.jar"/>
           <zipfileset src="${gwt.tools.lib}/apache/tapestry-util-text-4.0.2.jar"/>
           <zipfileset src="${gwt.tools.lib}/apache/ant-1.6.5.jar"/>
           <zipfileset src="${gwt.tools.lib}/colt/colt-1.2.jar"/>
           <zipfileset
-              src="${gwt.tools.lib}/eclipse/org.eclipse.jdt.core_3.13.102-CUSTOM-GWT-20180415.jar"/>
+              src="${gwt.tools.lib}/eclipse/org.eclipse.jdt.core_3.17.0.v20190306-2240.jar"/>
           <zipfileset
-              src="${gwt.tools.lib}/eclipse/jdtCompilerAdapter_3.13.102-CUSTOM-GWT-20180415.jar"/>
+              src="${gwt.tools.lib}/eclipse/jdtCompilerAdapter_3.17.0.v20190306-2240.jar"/>
           <zipfileset src="${gwt.tools.lib}/guava/guava-19.0/guava-19.0-rebased.jar"/>
           <zipfileset src="${gwt.tools.lib}/icu4j/63.1/icu4j.jar"/>
           <zipfileset
@@ -222,15 +222,15 @@
       <classpath>
         <pathelement location="${gwt.tools.lib}/apache/ant-1.6.5.jar"/>
         <pathelement location="${gwt.tools.lib}/colt/colt-1.2.jar"/>
-        <pathelement location="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-6.1.1.jar"/>
-        <pathelement location="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-commons-6.1.1.jar"/>
-        <pathelement location="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-util-6.1.1.jar"/>
+        <pathelement location="${gwt.tools.lib}/objectweb/asm-7.1/asm-7.1.jar"/>
+        <pathelement location="${gwt.tools.lib}/objectweb/asm-7.1/asm-commons-7.1.jar"/>
+        <pathelement location="${gwt.tools.lib}/objectweb/asm-7.1/asm-util-7.1.jar"/>
         <pathelement
             location="${gwt.tools.lib}/apache/commons/commons-collections-3.2.2.jar"/>
         <pathelement
-            location="${gwt.tools.lib}/eclipse/org.eclipse.jdt.core_3.13.102-CUSTOM-GWT-20180415.jar"/>
+            location="${gwt.tools.lib}/eclipse/org.eclipse.jdt.core_3.17.0.v20190306-2240.jar"/>
         <pathelement
-            location="${gwt.tools.lib}/eclipse/jdtCompilerAdapter_3.13.102-CUSTOM-GWT-20180415.jar"/>
+            location="${gwt.tools.lib}/eclipse/jdtCompilerAdapter_3.17.0.v20190306-2240.jar"/>
         <pathelement
             location="${gwt.tools.lib}/guava/guava-19.0/guava-19.0-rebased.jar"/>
         <pathelement location="${gwt.tools.lib}/gson/gson-2.6.2.jar"/>
diff --git a/dev/core/src/com/google/gwt/dev/javac/BytecodeSignatureMaker.java b/dev/core/src/com/google/gwt/dev/javac/BytecodeSignatureMaker.java
index 9933f6c..762c422 100644
--- a/dev/core/src/com/google/gwt/dev/javac/BytecodeSignatureMaker.java
+++ b/dev/core/src/com/google/gwt/dev/javac/BytecodeSignatureMaker.java
@@ -56,7 +56,7 @@
     private Map<String, String> methods = new HashMap<String, String>();
 
     public CompileDependencyVisitor() {
-      super(Opcodes.ASM6);
+      super(Opcodes.ASM7);
     }
 
     public String getSignature() {
diff --git a/dev/core/src/com/google/gwt/dev/javac/CompilationUnit.java b/dev/core/src/com/google/gwt/dev/javac/CompilationUnit.java
index d2bb682..6f7f003 100644
--- a/dev/core/src/com/google/gwt/dev/javac/CompilationUnit.java
+++ b/dev/core/src/com/google/gwt/dev/javac/CompilationUnit.java
@@ -66,7 +66,7 @@
 
       public AnonymousClassVisitor() {
 
-        this.mv = new org.objectweb.asm.MethodVisitor(Opcodes.ASM6, this.mv) {
+        this.mv = new org.objectweb.asm.MethodVisitor(Opcodes.ASM7, this.mv) {
           @Override
           public void visitCode() {
             ++sawCode;
diff --git a/dev/core/src/com/google/gwt/dev/javac/JdtCompiler.java b/dev/core/src/com/google/gwt/dev/javac/JdtCompiler.java
index af7e4c5..c0e5748 100644
--- a/dev/core/src/com/google/gwt/dev/javac/JdtCompiler.java
+++ b/dev/core/src/com/google/gwt/dev/javac/JdtCompiler.java
@@ -786,7 +786,8 @@
       ImmutableMap.<SourceLevel, Long>of(
           SourceLevel.JAVA8, ClassFileConstants.JDK1_8,
           SourceLevel.JAVA9, ClassFileConstants.JDK9,
-          SourceLevel.JAVA10, ClassFileConstants.JDK10);
+          SourceLevel.JAVA10, ClassFileConstants.JDK10,
+          SourceLevel.JAVA11, ClassFileConstants.JDK11);
 
   public JdtCompiler(CompilerContext compilerContext, UnitProcessor processor) {
     this.compilerContext = compilerContext;
diff --git a/dev/core/src/com/google/gwt/dev/javac/asm/CollectAnnotationData.java b/dev/core/src/com/google/gwt/dev/javac/asm/CollectAnnotationData.java
index 6bc844b..95fcc52 100644
--- a/dev/core/src/com/google/gwt/dev/javac/asm/CollectAnnotationData.java
+++ b/dev/core/src/com/google/gwt/dev/javac/asm/CollectAnnotationData.java
@@ -79,7 +79,7 @@
     private final List<Object> values = new ArrayList<Object>();
 
     public MyAnnotationArrayVisitor(Callback<Object> callback) {
-      super(Opcodes.ASM6);
+      super(Opcodes.ASM7);
       this.callback = callback;
     }
 
@@ -158,7 +158,7 @@
    */
   CollectAnnotationData(String desc, boolean visible,
       Callback<CollectAnnotationData.AnnotationData> callback) {
-    super(Opcodes.ASM6);
+    super(Opcodes.ASM7);
     annotation = new AnnotationData(desc, visible);
     this.callback = callback;
   }
diff --git a/dev/core/src/com/google/gwt/dev/javac/asm/CollectFieldData.java b/dev/core/src/com/google/gwt/dev/javac/asm/CollectFieldData.java
index 7d59164..3bfb434 100644
--- a/dev/core/src/com/google/gwt/dev/javac/asm/CollectFieldData.java
+++ b/dev/core/src/com/google/gwt/dev/javac/asm/CollectFieldData.java
@@ -36,7 +36,7 @@
 
   public CollectFieldData(int access, String name, String desc,
       String signature, Object value) {
-    super(Opcodes.ASM6);
+    super(Opcodes.ASM7);
     this.access = access;
     this.name = name;
     this.desc = desc;
diff --git a/dev/core/src/com/google/gwt/dev/javac/asm/CollectMethodData.java b/dev/core/src/com/google/gwt/dev/javac/asm/CollectMethodData.java
index c3f72d4..95f17a4 100644
--- a/dev/core/src/com/google/gwt/dev/javac/asm/CollectMethodData.java
+++ b/dev/core/src/com/google/gwt/dev/javac/asm/CollectMethodData.java
@@ -58,7 +58,7 @@
   // for new List[]
   public CollectMethodData(CollectClassData.ClassType classType, int access,
       String name, String desc, String signature, String[] exceptions) {
-    super(Opcodes.ASM6);
+    super(Opcodes.ASM7);
     this.access = access;
     this.name = name;
     this.desc = desc;
diff --git a/dev/core/src/com/google/gwt/dev/javac/asm/CollectReferencesVisitor.java b/dev/core/src/com/google/gwt/dev/javac/asm/CollectReferencesVisitor.java
index 7a523d9..17b3293 100644
--- a/dev/core/src/com/google/gwt/dev/javac/asm/CollectReferencesVisitor.java
+++ b/dev/core/src/com/google/gwt/dev/javac/asm/CollectReferencesVisitor.java
@@ -42,7 +42,7 @@
   private class CollectGenericTypes extends SignatureVisitor {
 
     public CollectGenericTypes() {
-      super(Opcodes.ASM6);
+      super(Opcodes.ASM7);
     }
 
     @Override
@@ -121,7 +121,7 @@
   }
 
   CollectReferencesVisitor() {
-    this.av = new AnnotationVisitor(Opcodes.ASM6, this.av) {
+    this.av = new AnnotationVisitor(Opcodes.ASM7, this.av) {
       @Override
       public void visitEnum(String name, String desc, String value) {
         addTypeIfClass(desc);
diff --git a/dev/core/src/com/google/gwt/dev/javac/asm/EmptySignatureVisitor.java b/dev/core/src/com/google/gwt/dev/javac/asm/EmptySignatureVisitor.java
index 1ce3cd8..fe53857 100644
--- a/dev/core/src/com/google/gwt/dev/javac/asm/EmptySignatureVisitor.java
+++ b/dev/core/src/com/google/gwt/dev/javac/asm/EmptySignatureVisitor.java
@@ -34,7 +34,7 @@
   protected static EmptySignatureVisitor ignore = new EmptySignatureVisitor();
 
   public EmptySignatureVisitor() {
-    super(Opcodes.ASM6);
+    super(Opcodes.ASM7);
   }
 
   /**
diff --git a/dev/core/src/com/google/gwt/dev/javac/asmbridge/EmptyVisitor.java b/dev/core/src/com/google/gwt/dev/javac/asmbridge/EmptyVisitor.java
index 4fa5fde..ffa3ba4 100644
--- a/dev/core/src/com/google/gwt/dev/javac/asmbridge/EmptyVisitor.java
+++ b/dev/core/src/com/google/gwt/dev/javac/asmbridge/EmptyVisitor.java
@@ -27,7 +27,7 @@
  */
 public class EmptyVisitor extends ClassVisitor {
 
-  protected AnnotationVisitor av = new AnnotationVisitor(Opcodes.ASM6) {
+  protected AnnotationVisitor av = new AnnotationVisitor(Opcodes.ASM7) {
 
     @Override
     public AnnotationVisitor visitAnnotation(String name, String desc) {
@@ -41,10 +41,10 @@
   };
 
   public EmptyVisitor() {
-    super(Opcodes.ASM6);
+    super(Opcodes.ASM7);
   }
 
-  protected MethodVisitor mv = new MethodVisitor(Opcodes.ASM6) {
+  protected MethodVisitor mv = new MethodVisitor(Opcodes.ASM7) {
 
     @Override
     public AnnotationVisitor visitAnnotationDefault() {
@@ -63,7 +63,7 @@
     }
   };
 
-  protected FieldVisitor fv = new FieldVisitor(Opcodes.ASM6) {
+  protected FieldVisitor fv = new FieldVisitor(Opcodes.ASM7) {
 
     @Override
     public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
diff --git a/dev/core/src/com/google/gwt/dev/shell/rewrite/ForceClassVersion15.java b/dev/core/src/com/google/gwt/dev/shell/rewrite/ForceClassVersion15.java
index 1be0d79..52c5e75 100644
--- a/dev/core/src/com/google/gwt/dev/shell/rewrite/ForceClassVersion15.java
+++ b/dev/core/src/com/google/gwt/dev/shell/rewrite/ForceClassVersion15.java
@@ -25,7 +25,7 @@
 class ForceClassVersion15 extends ClassVisitor {
 
   public ForceClassVersion15(ClassVisitor v) {
-    super(Opcodes.ASM6, v);
+    super(Opcodes.ASM7, v);
   }
 
   @Override
diff --git a/dev/core/src/com/google/gwt/dev/shell/rewrite/HasAnnotation.java b/dev/core/src/com/google/gwt/dev/shell/rewrite/HasAnnotation.java
index b99e5c7..15f0d15 100644
--- a/dev/core/src/com/google/gwt/dev/shell/rewrite/HasAnnotation.java
+++ b/dev/core/src/com/google/gwt/dev/shell/rewrite/HasAnnotation.java
@@ -54,7 +54,7 @@
   private final String targetDesc;
 
   public HasAnnotation(ClassVisitor v, Class<? extends Annotation> annotation) {
-    super(Opcodes.ASM6, v);
+    super(Opcodes.ASM7, v);
     targetDesc = Type.getDescriptor(annotation);
   }
 
diff --git a/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteJsniMethods.java b/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteJsniMethods.java
index e2fdafb..6ce96eb 100644
--- a/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteJsniMethods.java
+++ b/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteJsniMethods.java
@@ -206,7 +206,7 @@
 
     public MyMethodAdapter(MethodVisitor mv, int access, String name,
         String desc) {
-      super(Opcodes.ASM6, mv, access, name, desc);
+      super(Opcodes.ASM7, mv, access, name, desc);
       this.descriptor = desc;
       this.name = name;
       isStatic = (access & Opcodes.ACC_STATIC) != 0;
@@ -329,7 +329,7 @@
 
   public RewriteJsniMethods(ClassVisitor v,
       Map<String, String> anonymousClassMap) {
-    super(Opcodes.ASM6, v);
+    super(Opcodes.ASM7, v);
     this.anonymousClassMap = anonymousClassMap;
   }
 
diff --git a/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteRefsToJsoClasses.java b/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteRefsToJsoClasses.java
index d860ab7..1911d51 100644
--- a/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteRefsToJsoClasses.java
+++ b/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteRefsToJsoClasses.java
@@ -54,7 +54,7 @@
     };
 
     public MyMethodAdapter(MethodVisitor mv) {
-      super(Opcodes.ASM6, mv);
+      super(Opcodes.ASM7, mv);
     }
 
     @Override
@@ -132,7 +132,7 @@
    */
   public RewriteRefsToJsoClasses(ClassVisitor cv, Set<String> jsoDescriptors,
       InstanceMethodOracle mapper) {
-    super(Opcodes.ASM6, cv);
+    super(Opcodes.ASM7, cv);
     this.jsoDescriptors = jsoDescriptors;
     this.mapper = mapper;
   }
diff --git a/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteSingleJsoImplDispatches.java b/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteSingleJsoImplDispatches.java
index 7246b55..ff38213 100644
--- a/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteSingleJsoImplDispatches.java
+++ b/dev/core/src/com/google/gwt/dev/shell/rewrite/RewriteSingleJsoImplDispatches.java
@@ -57,7 +57,7 @@
 public class RewriteSingleJsoImplDispatches extends ClassVisitor {
   private class MyMethodVisitor extends MethodVisitor {
     public MyMethodVisitor(MethodVisitor mv) {
-      super(Opcodes.ASM6, mv);
+      super(Opcodes.ASM7, mv);
     }
 
     /*
@@ -133,7 +133,7 @@
 
   public RewriteSingleJsoImplDispatches(ClassVisitor v, TypeOracle typeOracle,
       SingleJsoImplData jsoData) {
-    super(Opcodes.ASM6, v);
+    super(Opcodes.ASM7, v);
     this.typeOracle = typeOracle;
     this.jsoData = jsoData;
   }
diff --git a/dev/core/src/com/google/gwt/dev/shell/rewrite/UseMirroredClasses.java b/dev/core/src/com/google/gwt/dev/shell/rewrite/UseMirroredClasses.java
index 70dba63..51ac42d 100644
--- a/dev/core/src/com/google/gwt/dev/shell/rewrite/UseMirroredClasses.java
+++ b/dev/core/src/com/google/gwt/dev/shell/rewrite/UseMirroredClasses.java
@@ -72,7 +72,7 @@
     private String className;
 
     protected MethodInterceptor(MethodVisitor mv, String className) {
-      super(Opcodes.ASM6, mv);
+      super(Opcodes.ASM7, mv);
       this.className = className;
     }
 
@@ -144,7 +144,7 @@
   private String className;
 
   public UseMirroredClasses(ClassVisitor cv, String className) {
-    super(Opcodes.ASM6, cv);
+    super(Opcodes.ASM7, cv);
     this.className = className;
   }
 
diff --git a/dev/core/src/com/google/gwt/dev/shell/rewrite/WriteJsoImpl.java b/dev/core/src/com/google/gwt/dev/shell/rewrite/WriteJsoImpl.java
index d06602e..8d46073 100644
--- a/dev/core/src/com/google/gwt/dev/shell/rewrite/WriteJsoImpl.java
+++ b/dev/core/src/com/google/gwt/dev/shell/rewrite/WriteJsoImpl.java
@@ -264,7 +264,7 @@
    * @param mapper maps methods to the class in which they are declared
    */
   private WriteJsoImpl(ClassVisitor cv, InstanceMethodOracle mapper) {
-    super(Opcodes.ASM6, cv);
+    super(Opcodes.ASM7, cv);
     this.mapper = mapper;
   }
 
diff --git a/dev/core/src/com/google/gwt/dev/util/arg/SourceLevel.java b/dev/core/src/com/google/gwt/dev/util/arg/SourceLevel.java
index 1243189..d78d573 100644
--- a/dev/core/src/com/google/gwt/dev/util/arg/SourceLevel.java
+++ b/dev/core/src/com/google/gwt/dev/util/arg/SourceLevel.java
@@ -25,7 +25,8 @@
   // Source levels must appear in ascending order for the default setting logic to work.
   JAVA8("1.8", "8"),
   JAVA9("1.9", "9"),
-  JAVA10("1.10", "10");
+  JAVA10("1.10", "10"),
+  JAVA11("1.11", "11");
 
   /**
    * The default java sourceLevel.
diff --git a/dev/core/test/com/google/gwt/dev/CompilerTest.java b/dev/core/test/com/google/gwt/dev/CompilerTest.java
index 88fce34..4d75a17 100644
--- a/dev/core/test/com/google/gwt/dev/CompilerTest.java
+++ b/dev/core/test/com/google/gwt/dev/CompilerTest.java
@@ -959,6 +959,7 @@
     assertEquals(SourceLevel.JAVA8, SourceLevel.getBestMatchingVersion("1.8"));
     assertEquals(SourceLevel.JAVA9, SourceLevel.getBestMatchingVersion("1.9"));
     assertEquals(SourceLevel.JAVA10, SourceLevel.getBestMatchingVersion("1.10"));
+    assertEquals(SourceLevel.JAVA11, SourceLevel.getBestMatchingVersion("1.11"));
 
     // not proper version strings => default to JAVA8.
     assertEquals(SourceLevel.JAVA8, SourceLevel.getBestMatchingVersion("1.6u3"));
@@ -1701,7 +1702,7 @@
     File applicationDir = Files.createTempDir();
     CompilerOptions compilerOptions = new CompilerOptionsImpl();
     compilerOptions.setUseDetailedTypeIds(true);
-    compilerOptions.setSourceLevel(SourceLevel.JAVA10);
+    compilerOptions.setSourceLevel(SourceLevel.JAVA11);
 
     // Compile the application with no errors.
     compileToJs(TreeLogger.NULL, compilerOptions, applicationDir, "com.foo.Errors",
@@ -1764,7 +1765,7 @@
     File applicationDir = Files.createTempDir();
     CompilerOptions compilerOptions = new CompilerOptionsImpl();
     compilerOptions.setUseDetailedTypeIds(true);
-    compilerOptions.setSourceLevel(SourceLevel.JAVA10);
+    compilerOptions.setSourceLevel(SourceLevel.JAVA11);
     compilerOptions.setGenerateJsInteropExports(false);
 
     // Compile the application with no errors.
@@ -2115,7 +2116,7 @@
 
     CompilerOptions compilerOptions = new CompilerOptionsImpl();
     compilerOptions.setUseDetailedTypeIds(true);
-    compilerOptions.setSourceLevel(SourceLevel.JAVA10);
+    compilerOptions.setSourceLevel(SourceLevel.JAVA11);
 
     checkRecompiledModifiedApp(compilerOptions, "com.foo.DefaultMethod",
         Lists.newArrayList(moduleResource, entryPointResource, aSubclass,
diff --git a/dev/core/test/com/google/gwt/dev/jjs/impl/GwtAstBuilderTest.java b/dev/core/test/com/google/gwt/dev/jjs/impl/GwtAstBuilderTest.java
index 251d27c..f9a830f 100644
--- a/dev/core/test/com/google/gwt/dev/jjs/impl/GwtAstBuilderTest.java
+++ b/dev/core/test/com/google/gwt/dev/jjs/impl/GwtAstBuilderTest.java
@@ -26,17 +26,13 @@
 import com.google.gwt.dev.jjs.JavaAstConstructor;
 import com.google.gwt.dev.jjs.ast.Context;
 import com.google.gwt.dev.jjs.ast.JArrayType;
-import com.google.gwt.dev.jjs.ast.JCastOperation;
 import com.google.gwt.dev.jjs.ast.JClassLiteral;
 import com.google.gwt.dev.jjs.ast.JDeclaredType;
 import com.google.gwt.dev.jjs.ast.JExpression;
-import com.google.gwt.dev.jjs.ast.JExpressionStatement;
 import com.google.gwt.dev.jjs.ast.JMethod;
-import com.google.gwt.dev.jjs.ast.JMethodBody;
 import com.google.gwt.dev.jjs.ast.JMethodCall;
 import com.google.gwt.dev.jjs.ast.JProgram;
 import com.google.gwt.dev.jjs.ast.JReferenceType;
-import com.google.gwt.dev.jjs.ast.JStatement;
 import com.google.gwt.dev.jjs.ast.JType;
 import com.google.gwt.dev.jjs.ast.JVariable;
 import com.google.gwt.dev.jjs.ast.JVisitor;
@@ -233,41 +229,25 @@
   }
 
   public void testIntersectionBound() throws UnableToCompleteException {
-    sources.add(JavaResourceBase.createMockJavaResource("test.IntersectionBound",
+    addAll(JavaResourceBase.createMockJavaResource("test.IntersectionBound",
         "package test;",
+        "interface A<T> { void a(); }",
+        "interface B { void b(); }",
+        "interface C { void c(); }",
         "public class IntersectionBound {",
-        "  public void main() {",
-        "    get().f();",
-        "    get().g();",
-        "    get().h();",
-        "  }",
-        "  public interface A<T> { void f(); }",
-        "  public interface B { void g(); }",
-        "  public interface C { void h(); }",
         "  <T extends B & A<String> & C> T get() { return null;} ",
         "}"
     ));
 
-    JProgram program = compileProgram("test.IntersectionBound");
-    JMethod mainMethod = findQualifiedMethod(program, "test.IntersectionBound.main");
-    for (JStatement statement : ((JMethodBody) mainMethod.getBody()).getStatements()) {
-      // TODO: should have inserted only a cast to the type needed in the specific context context,
-      // but that would require some redesign. For now make sure all the casts from the intersection
-      // type are emitted.
-      JExpression maybeCastOperation =
-          ((JMethodCall) ((JExpressionStatement) statement).getExpr()).getInstance();
-      Set<String> castToTypeNames = Sets.newHashSet();
-      while (maybeCastOperation instanceof  JCastOperation) {
-        JCastOperation castOperation = (JCastOperation) maybeCastOperation;
-        castToTypeNames.add(castOperation.getCastType().getName());
-        maybeCastOperation = castOperation.getExpr();
-      }
-
-      assertEquals(
-          Sets.newHashSet(Arrays.asList(
-              "test.IntersectionBound$A", "test.IntersectionBound$B", "test.IntersectionBound$C")),
-          castToTypeNames);
-    }
+    assertEqualBlock(
+        "((C)(B)(A)(new IntersectionBound()).get()).a();",
+        "new IntersectionBound().get().a();");
+    assertEqualBlock(
+        "(new IntersectionBound()).get().b();",
+        "new IntersectionBound().get().b();");
+    assertEqualBlock(
+        "((C)(new IntersectionBound()).get()).c();", 
+        "new IntersectionBound().get().c();");
   }
 
   public void testBridgeMethodResolution() throws UnableToCompleteException {
diff --git a/dev/core/test/com/google/gwt/dev/jjs/impl/Java11AstTest.java b/dev/core/test/com/google/gwt/dev/jjs/impl/Java11AstTest.java
new file mode 100644
index 0000000..f0e9ab2
--- /dev/null
+++ b/dev/core/test/com/google/gwt/dev/jjs/impl/Java11AstTest.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.gwt.dev.jjs.impl;
+
+import com.google.gwt.dev.javac.testing.impl.JavaResourceBase;
+import com.google.gwt.dev.jjs.ast.JMethod;
+import com.google.gwt.dev.jjs.ast.JProgram;
+import com.google.gwt.thirdparty.guava.common.base.Joiner;
+
+/**
+ * Tests that {@link com.google.gwt.dev.jjs.impl.GwtAstBuilder} correctly builds the AST for
+ * features introduced in Java 11.
+ */
+public class Java11AstTest extends FullCompileTestBase {
+
+  @Override
+  public void setUp() throws Exception {
+    super.setUp();
+    addAll(JavaResourceBase.createMockJavaResource("test.NotNull",
+        "package test;",
+        "public @interface NotNull {",
+        "}"
+    ));
+    addAll(JavaResourceBase.createMockJavaResource("test.Lambda",
+        "package test;",
+        "public interface Lambda<T> {",
+        "  T run(String a, int b);",
+        "}"
+    ));
+    addAll(JavaResourceBase.createMockJavaResource("test.Function",
+        "package test;",
+        "public interface Function<T, R> {",
+        "  R apply(T value);",
+        "}"
+    ));
+    addAll(JavaResourceBase.createMockJavaResource("test.Mappable",
+        "package test;",
+        "public interface Mappable<T> {",
+        "  <R> Mappable<R> map(Function<? super T, ? extends R> mapper);",
+        "}"
+    ));
+  }
+
+  public void testLambdaParametersVarType() throws Exception {
+    JProgram program = compileSnippet("void",
+        "Lambda<String> l = (@NotNull var a, var b) -> a + b;");
+    JMethod lambdaMethod = findMethod(program, "lambda$0");
+    assertEquals("lambda$0(Ljava/lang/String;I)Ljava/lang/String;", lambdaMethod.getSignature());
+  }
+
+  public void testLambdaParametersVarType_function() throws Exception {
+    JProgram program = compileSnippet("void", Joiner.on('\n').join(
+        "Mappable<String> m = null;",
+        "Mappable<String> mapped = m.map((var s) -> s);"
+    ));
+    JMethod lambdaMethod = findMethod(program, "lambda$0");
+    assertEquals("lambda$0(Ljava/lang/String;)Ljava/lang/String;", lambdaMethod.getSignature());
+  }
+
+  @Override
+  protected void optimizeJava() {
+  }
+}
diff --git a/dev/core/test/com/google/gwt/dev/jjs/impl/Java8AstTest.java b/dev/core/test/com/google/gwt/dev/jjs/impl/Java8AstTest.java
index 62f8b83..a85cb10 100644
--- a/dev/core/test/com/google/gwt/dev/jjs/impl/Java8AstTest.java
+++ b/dev/core/test/com/google/gwt/dev/jjs/impl/Java8AstTest.java
@@ -1024,7 +1024,7 @@
     addSnippetClassDecl("interface I1 { public void foo(); }");
     addSnippetClassDecl("interface I2 { }");
     String lambda = "Object o = (I2 & I1) () -> {};";
-    assertEqualBlock("Object o=(EntryPoint$I2)(EntryPoint$I1)new EntryPoint$lambda$0$Type();",
+    assertEqualBlock("Object o=(EntryPoint$I1)(EntryPoint$I2)new EntryPoint$lambda$0$Type();",
         lambda);
 
     JProgram program = compileSnippet("void", lambda, false);
@@ -1060,7 +1060,7 @@
     addSnippetClassDecl("interface I3 { }");
     String lambda = "I2 o = (I3 & I2 & I1) () -> {};";
     assertEqualBlock(
-        "EntryPoint$I2 o=(EntryPoint$I3)(EntryPoint$I2)(EntryPoint$I1)new EntryPoint$lambda$0$Type();",
+        "EntryPoint$I2 o=(EntryPoint$I1)(EntryPoint$I2)(EntryPoint$I3)new EntryPoint$lambda$0$Type();",
         lambda);
 
     JProgram program = compileSnippet("void", lambda, false);
diff --git a/eclipse/dev/.classpath b/eclipse/dev/.classpath
index 4e24779..ac771cb 100644
--- a/eclipse/dev/.classpath
+++ b/eclipse/dev/.classpath
@@ -6,12 +6,12 @@
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/apache/ant-1.6.5.jar" sourcepath="/GWT_TOOLS/lib/apache/ant-1.6.5-src.zip"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/apache/tapestry-util-text-4.0.2.jar" sourcepath="/GWT_TOOLS/lib/apache/tapestry-util-text-4.0.2-src.zip"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/org.eclipse.jdt.core_3.13.102-CUSTOM-GWT-20180415.jar" sourcepath="/GWT_TOOLS/lib/eclipse/org.eclipse.jdt.core.source_3.13.102-CUSTOM-GWT-20180415.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/jdtCompilerAdapter_3.13.102-CUSTOM-GWT-20180415.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/org.eclipse.jdt.core_3.17.0.v20190306-2240.jar" sourcepath="/GWT_TOOLS/lib/eclipse/org.eclipse.jdt.core.source_3.17.0.v20190306-2240.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/jdtCompilerAdapter_3.17.0.v20190306-2240.jar"/>
 	<classpathentry exported="true" kind="var" path="GWT_TOOLS/lib/jetty/jetty-9.2.14.v20151106/jetty-all-9.2.14.v20151106.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/jsr305/jsr305.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/junit/junit-4.8.2.jar" sourcepath="/GWT_TOOLS/lib/junit/junit-4.8.2-src.zip"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-6.1.1/asm-6.1.1.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-7.1/asm-7.1.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/tomcat/ant-launcher-1.6.5.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/tomcat/catalina-1.0.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/tomcat/catalina-optional-1.0.jar"/>
@@ -30,9 +30,7 @@
 	<classpathentry exported="true" kind="var" path="GWT_TOOLS/lib/tomcat/tomcat-websocket-api-8.0.28.jar"/>
 	<classpathentry exported="true" kind="var" path="GWT_TOOLS/lib/tomcat/tomcat-annotations-api-8.0.28.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/colt/colt-1.2.jar" sourcepath="/GWT_TOOLS/lib/colt/colt-1.2-src.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-6.1.1/asm-analysis-6.1.1.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-6.1.1/asm-commons-6.1.1.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-6.1.1/asm-tree-6.1.1.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-6.1.1/asm-util-6.1.1.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-7.1/asm-commons-7.1.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-7.1/asm-util-7.1.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/eclipse/user/.classpath b/eclipse/user/.classpath
index 4e98014..75f9362 100644
--- a/eclipse/user/.classpath
+++ b/eclipse/user/.classpath
@@ -61,9 +61,9 @@
 	<classpathentry kind="var" path="GWT_TOOLS/lib/testng/testng-5.14.1-nojunit.jar" sourcepath="/GWT_TOOLS/lib/testng/testng-5.14.1-sources.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/protobuf/protobuf-2.5.0/protobuf-java-rebased-2.5.0.jar"/>
 	<classpathentry kind="var" path="GWT_TOOLS/lib/jscomp/20160315/sourcemap-rebased.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/org.eclipse.jdt.core_3.13.102-CUSTOM-GWT-20180415.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/jdtCompilerAdapter_3.13.102-CUSTOM-GWT-20180415.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-6.1.1/asm-6.1.1.jar"/>
-	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-6.1.1/asm-commons-6.1.1.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/org.eclipse.jdt.core_3.17.0.v20190306-2240.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/eclipse/jdtCompilerAdapter_3.17.0.v20190306-2240.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-7.1/asm-7.1.jar"/>
+	<classpathentry kind="var" path="GWT_TOOLS/lib/objectweb/asm-7.1/asm-commons-7.1.jar"/>
 	<classpathentry kind="output" path="bin"/>
 </classpath>
diff --git a/maven/poms/gwt/pom-template.xml b/maven/poms/gwt/pom-template.xml
index 883e905..8b1d89c 100644
--- a/maven/poms/gwt/pom-template.xml
+++ b/maven/poms/gwt/pom-template.xml
@@ -22,6 +22,7 @@
     </licenses>
     <properties>
       <jetty.version>9.2.14.v20151106</jetty.version>
+      <asm.version>7.1</asm.version>
     </properties>
     <dependencyManagement>
         <dependencies>
@@ -89,17 +90,17 @@
             <dependency>
                 <groupId>org.ow2.asm</groupId>
                 <artifactId>asm</artifactId>
-                <version>6.1.1</version>
+                <version>${asm.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.ow2.asm</groupId>
                 <artifactId>asm-commons</artifactId>
-                <version>6.1.1</version>
+                <version>${asm.version}</version>
             </dependency>
             <dependency>
                 <groupId>org.ow2.asm</groupId>
                 <artifactId>asm-util</artifactId>
-                <version>6.1.1</version>
+                <version>${asm.version}</version>
             </dependency>
             <dependency>
                 <groupId>colt</groupId>
diff --git a/user/build.xml b/user/build.xml
index 8dd3dd9..3d2a256 100755
--- a/user/build.xml
+++ b/user/build.xml
@@ -65,8 +65,8 @@
     <pathelement location="${gwt.tools.lib}/cglib/cglib-3.1.jar"/>
     <pathelement location="${gwt.tools.lib}/mockito/1.9.5/mockito-all-1.9.5.jar"/>
     <pathelement location="${gwt.tools.lib}/objenesis/objenesis-1.2.jar"/>
-    <pathelement location="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-6.1.1.jar"/>
-    <pathelement location="${gwt.tools.lib}/objectweb/asm-6.1.1/asm-commons-6.1.1.jar"/>
+    <pathelement location="${gwt.tools.lib}/objectweb/asm-7.1/asm-7.1.jar"/>
+    <pathelement location="${gwt.tools.lib}/objectweb/asm-7.1/asm-commons-7.1.jar"/>
     <pathelement location="${gwt.tools.lib}/javax/validation/validation-api-1.0.0.GA.jar"/>
     <pathelement location="${gwt.tools.lib}/javax/validation/validation-api-1.0.0.GA-sources.jar"/>
     <pathelement
diff --git a/user/src/com/google/web/bindery/requestfactory/server/RequestFactoryJarExtractor.java b/user/src/com/google/web/bindery/requestfactory/server/RequestFactoryJarExtractor.java
index f5906e3..4e12d76 100644
--- a/user/src/com/google/web/bindery/requestfactory/server/RequestFactoryJarExtractor.java
+++ b/user/src/com/google/web/bindery/requestfactory/server/RequestFactoryJarExtractor.java
@@ -352,7 +352,7 @@
 
     public AnnotationProcessor(String sourceType, AnnotationVisitor av) {
       // TODO(rluble): should we chain av to super here?
-      super(Opcodes.ASM6);
+      super(Opcodes.ASM7);
       this.sourceType = sourceType;
       this.av = av;
     }
@@ -386,7 +386,7 @@
     private String sourceType;
 
     public ClassProcessor(String sourceType, ClassVisitor cv, State state) {
-      super(Opcodes.ASM6, cv);
+      super(Opcodes.ASM7, cv);
       this.sourceType = sourceType;
       this.state = state;
     }
@@ -519,7 +519,7 @@
 
     public FieldProcessor(String sourceType, FieldVisitor fv) {
       // TODO(rluble): Should we chain fv to super here?
-      super(Opcodes.ASM6);
+      super(Opcodes.ASM7);
       this.sourceType = sourceType;
       this.fv = fv;
     }
@@ -541,7 +541,7 @@
     private final String sourceType;
 
     public MethodProcessor(String sourceType, MethodVisitor mv) {
-      super(Opcodes.ASM6, mv);
+      super(Opcodes.ASM7, mv);
       this.sourceType = sourceType;
     }
 
@@ -630,7 +630,7 @@
    */
   private class NativeMethodDefanger extends ClassVisitor {
     public NativeMethodDefanger(ClassVisitor cv) {
-      super(Opcodes.ASM6, cv);
+      super(Opcodes.ASM7, cv);
     }
 
     @Override
diff --git a/user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java11Test.java b/user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java11Test.java
new file mode 100644
index 0000000..9e9c8f6
--- /dev/null
+++ b/user/test-super/com/google/gwt/dev/jjs/super/com/google/gwt/dev/jjs/test/Java11Test.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.gwt.dev.jjs.test;
+
+import com.google.gwt.core.client.GwtScriptOnly;
+import com.google.gwt.junit.client.GWTTestCase;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * Tests Java 11 features. It is super sourced so that gwt can be compiles under Java 8.
+ *
+ * IMPORTANT: For each test here there must exist the corresponding method in the non super sourced
+ * version.
+ *
+ * Eventually this test will graduate and not be super sourced.
+ */
+@GwtScriptOnly
+public class Java11Test extends GWTTestCase {
+
+  @interface NotNull {
+  }
+
+  interface Lambda<T> {
+    T run(T a, T b);
+  }
+
+  @Override
+  public String getModuleName() {
+    return "com.google.gwt.dev.jjs.Java11Test";
+  }
+
+  public void testLambdaParametersVarType() {
+    Lambda<String> l = (@NotNull var x, var y) -> x + y;
+    assertEquals("12", l.run("1", "2"));
+  }
+
+  public void testLambdaParametersVarType_function() {
+    List<String> l = Arrays.asList("a", "b");
+    l = l.stream().map((var s) -> s.toUpperCase()).collect(Collectors.toList());
+    assertEquals("A", l.get(0));
+    assertEquals("B", l.get(1));
+  }
+}
diff --git a/user/test/com/google/gwt/dev/jjs/CompilerSuite.java b/user/test/com/google/gwt/dev/jjs/CompilerSuite.java
index 3bd801e..7ee0fb2 100644
--- a/user/test/com/google/gwt/dev/jjs/CompilerSuite.java
+++ b/user/test/com/google/gwt/dev/jjs/CompilerSuite.java
@@ -28,6 +28,7 @@
 import com.google.gwt.dev.jjs.test.InnerClassTest;
 import com.google.gwt.dev.jjs.test.InnerOuterSuperTest;
 import com.google.gwt.dev.jjs.test.Java10Test;
+import com.google.gwt.dev.jjs.test.Java11Test;
 import com.google.gwt.dev.jjs.test.Java7Test;
 import com.google.gwt.dev.jjs.test.Java8Test;
 import com.google.gwt.dev.jjs.test.JavaAccessFromJavaScriptTest;
@@ -73,6 +74,7 @@
     // to avoid executing if not in a Java 8+ environment.
     suite.addTestSuite(Java8Test.class);
     suite.addTestSuite(Java10Test.class);
+    suite.addTestSuite(Java11Test.class);
     suite.addTestSuite(JavaAccessFromJavaScriptTest.class);
     suite.addTestSuite(JsniConstructorTest.class);
     suite.addTestSuite(JsniDispatchTest.class);
diff --git a/user/test/com/google/gwt/dev/jjs/Java11Test.gwt.xml b/user/test/com/google/gwt/dev/jjs/Java11Test.gwt.xml
new file mode 100644
index 0000000..a73ecb5
--- /dev/null
+++ b/user/test/com/google/gwt/dev/jjs/Java11Test.gwt.xml
@@ -0,0 +1,19 @@
+<!--                                                                        -->
+<!-- Copyright 2019 Google Inc.                                             -->
+<!-- Licensed under the Apache License, Version 2.0 (the "License"); you    -->
+<!-- may not use this file except in compliance with the License. You may   -->
+<!-- may obtain a copy of the License at                                    -->
+<!--                                                                        -->
+<!-- http://www.apache.org/licenses/LICENSE-2.0                             -->
+<!--                                                                        -->
+<!-- Unless required by applicable law or agreed to in writing, software    -->
+<!-- distributed under the License is distributed on an "AS IS" BASIS,      -->
+<!-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        -->
+<!-- implied. License for the specific language governing permissions and   -->
+<!-- limitations under the License.                                         -->
+
+<!-- Contains tests for breaking out of the client source path  -->
+<module>
+  <inherits name="com.google.gwt.core.Core" />
+  <super-source path='super' />
+</module>
\ No newline at end of file
diff --git a/user/test/com/google/gwt/dev/jjs/test/Java11Test.java b/user/test/com/google/gwt/dev/jjs/test/Java11Test.java
new file mode 100644
index 0000000..446c487
--- /dev/null
+++ b/user/test/com/google/gwt/dev/jjs/test/Java11Test.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.google.gwt.dev.jjs.test;
+
+import com.google.gwt.dev.util.arg.SourceLevel;
+import com.google.gwt.junit.DoNotRunWith;
+import com.google.gwt.junit.JUnitShell;
+import com.google.gwt.junit.Platform;
+import com.google.gwt.junit.client.GWTTestCase;
+
+/**
+ * Dummy test case. Java11Test is super sourced so that GWT can be compiled by Java 8.
+ *
+ * NOTE: Make sure this class has the same test methods of its supersourced variant.
+ */
+@DoNotRunWith(Platform.Devel)
+public class Java11Test extends GWTTestCase {
+
+  @Override
+  public String getModuleName() {
+    return "com.google.gwt.dev.jjs.Java11Test";
+  }
+
+  @Override
+  public void runTest() throws Throwable {
+    // Only run these tests if -sourceLevel 11 (or greater) is enabled.
+    if (isGwtSourceLevel11()) {
+      super.runTest();
+    }
+  }
+
+  public void testLambdaParametersVarType() {
+    assertFalse(isGwtSourceLevel11());
+  }
+
+  public void testLambdaParametersVarType_function() {
+    assertFalse(isGwtSourceLevel11());
+  }
+
+  private boolean isGwtSourceLevel11() {
+    return JUnitShell.getCompilerOptions().getSourceLevel().compareTo(SourceLevel.JAVA11) >= 0;
+  }
+}