diff --git a/teavm-core/src/main/java/org/teavm/dependency/DependencyChecker.java b/teavm-core/src/main/java/org/teavm/dependency/DependencyChecker.java
index 8ca881bd5..dbaf4aa14 100644
--- a/teavm-core/src/main/java/org/teavm/dependency/DependencyChecker.java
+++ b/teavm-core/src/main/java/org/teavm/dependency/DependencyChecker.java
@@ -252,6 +252,10 @@ public class DependencyChecker implements DependencyInfo, DependencyAgent {
         if (methodRef == null) {
             throw new IllegalArgumentException();
         }
+        MethodReader methodReader = methodReaderCache.map(methodRef);
+        if (methodReader != null) {
+            methodRef = methodReader.getReference();
+        }
         callGraph.getNode(methodRef);
         boolean added = true;
         if (callLocation != null && callLocation.getMethod() != null) {
@@ -472,6 +476,12 @@ public class DependencyChecker implements DependencyInfo, DependencyAgent {
         return methodCache.getKnown(methodRef);
     }
 
+    @Override
+    public MethodDependency getMethodImplementation(MethodReference methodRef) {
+        MethodReader method = methodReaderCache.map(methodRef);
+        return method != null ? methodCache.getKnown(method.getReference()) : null;
+    }
+
     public void processDependencies() {
         interrupted = false;
         int index = 0;
diff --git a/teavm-core/src/main/java/org/teavm/dependency/DependencyInfo.java b/teavm-core/src/main/java/org/teavm/dependency/DependencyInfo.java
index c2a8916e3..fd0c9b19b 100644
--- a/teavm-core/src/main/java/org/teavm/dependency/DependencyInfo.java
+++ b/teavm-core/src/main/java/org/teavm/dependency/DependencyInfo.java
@@ -40,6 +40,8 @@ public interface DependencyInfo {
 
     MethodDependencyInfo getMethod(MethodReference methodRef);
 
+    MethodDependencyInfo getMethodImplementation(MethodReference methodRef);
+
     ClassDependencyInfo getClass(String className);
 
     CallGraph getCallGraph();
diff --git a/teavm-core/src/main/java/org/teavm/javascript/Decompiler.java b/teavm-core/src/main/java/org/teavm/javascript/Decompiler.java
index 9567a7060..33d3c3311 100644
--- a/teavm-core/src/main/java/org/teavm/javascript/Decompiler.java
+++ b/teavm-core/src/main/java/org/teavm/javascript/Decompiler.java
@@ -46,14 +46,15 @@ public class Decompiler {
     private Set<MethodReference> methodsToPass = new HashSet<>();
     private RegularMethodNodeCache regularMethodCache;
     private Set<MethodReference> asyncMethods;
-    private Set<MethodReference> asyncFamilyMethods;
+    private Set<MethodReference> splitMethods = new HashSet<>();
 
     public Decompiler(ClassHolderSource classSource, ClassLoader classLoader, Set<MethodReference> asyncMethods,
             Set<MethodReference> asyncFamilyMethods) {
         this.classSource = classSource;
         this.classLoader = classLoader;
         this.asyncMethods = asyncMethods;
-        this.asyncFamilyMethods = asyncFamilyMethods;
+        splitMethods.addAll(asyncMethods);
+        splitMethods.addAll(asyncFamilyMethods);
     }
 
     public RegularMethodNodeCache getRegularMethodCache() {
@@ -199,10 +200,7 @@ public class Decompiler {
 
     public AsyncMethodNode decompileAsync(MethodHolder method) {
         AsyncMethodNode node = new AsyncMethodNode(method.getReference());
-        Set<MethodReference> splitMethods = new HashSet<>();
-        splitMethods.addAll(asyncMethods);
-        splitMethods.addAll(asyncFamilyMethods);
-        AsyncProgramSplitter splitter = new AsyncProgramSplitter(splitMethods);
+        AsyncProgramSplitter splitter = new AsyncProgramSplitter(classSource, splitMethods);
         splitter.split(method.getProgram());
         for (int i = 0; i < splitter.size(); ++i) {
             Integer input = null;
diff --git a/teavm-core/src/main/java/org/teavm/model/util/AsyncProgramSplitter.java b/teavm-core/src/main/java/org/teavm/model/util/AsyncProgramSplitter.java
index 16c02e49d..a657c2c45 100644
--- a/teavm-core/src/main/java/org/teavm/model/util/AsyncProgramSplitter.java
+++ b/teavm-core/src/main/java/org/teavm/model/util/AsyncProgramSplitter.java
@@ -28,9 +28,11 @@ import org.teavm.model.instructions.MonitorEnterInstruction;
 public class AsyncProgramSplitter {
     private List<Part> parts = new ArrayList<>();
     private Map<Long, Integer> partMap = new HashMap<>();
+    private ClassReaderSource classSource;
     private Set<MethodReference> asyncMethods = new HashSet<>();
 
-    public AsyncProgramSplitter(Set<MethodReference> asyncMethods) {
+    public AsyncProgramSplitter(ClassReaderSource classSource, Set<MethodReference> asyncMethods) {
+        this.classSource = classSource;
         this.asyncMethods = asyncMethods;
     }
 
@@ -62,7 +64,7 @@ public class AsyncProgramSplitter {
                 Integer receiver;
                 if (insn instanceof InvokeInstruction) {
                     InvokeInstruction invoke = (InvokeInstruction)insn;
-                    if (!asyncMethods.contains(invoke.getMethod())) {
+                    if (!asyncMethods.contains(findRealMethod(invoke.getMethod()))) {
                         continue;
                     }
                     receiver = invoke.getReceiver() != null ? invoke.getReceiver().getIndex() : null;
@@ -148,6 +150,25 @@ public class AsyncProgramSplitter {
         partMap.clear();
     }
 
+    private MethodReference findRealMethod(MethodReference method) {
+        String clsName = method.getClassName();
+        while (clsName != null) {
+            ClassReader cls = classSource.get(clsName);
+            if (cls == null) {
+                break;
+            }
+            MethodReader methodReader = cls.getMethod(method.getDescriptor());
+            if (methodReader != null) {
+                return new MethodReference(clsName, method.getDescriptor());
+            }
+            clsName = cls.getParent();
+            if (clsName != null && clsName.equals(cls.getName())) {
+                break;
+            }
+        }
+        return method;
+    }
+
     private Program createStubCopy(Program program) {
         Program copy = new Program();
         for (int i = 0; i < program.basicBlockCount(); ++i) {
diff --git a/teavm-core/src/main/java/org/teavm/optimization/Devirtualization.java b/teavm-core/src/main/java/org/teavm/optimization/Devirtualization.java
index f031a9650..994a77b67 100644
--- a/teavm-core/src/main/java/org/teavm/optimization/Devirtualization.java
+++ b/teavm-core/src/main/java/org/teavm/optimization/Devirtualization.java
@@ -74,7 +74,8 @@ public class Devirtualization {
             if (cls == null || !isAssignable(ref.getClassName(), cls)) {
                 continue;
             }
-            MethodDependencyInfo methodDep = dependency.getMethod(new MethodReference(className, ref.getDescriptor()));
+            MethodDependencyInfo methodDep = dependency.getMethodImplementation(new MethodReference(
+                    className, ref.getDescriptor()));
             if (methodDep != null) {
                 methods.add(methodDep.getReference());
             }
diff --git a/teavm-core/src/main/resources/org/teavm/javascript/runtime.js b/teavm-core/src/main/resources/org/teavm/javascript/runtime.js
index 92fd02fc9..40ee7774d 100644
--- a/teavm-core/src/main/resources/org/teavm/javascript/runtime.js
+++ b/teavm-core/src/main/resources/org/teavm/javascript/runtime.js
@@ -558,6 +558,9 @@ function $rt_guardAsync(f, continuation) {
 function TeaVMAsyncError(cause) {
     this.message = "Async error occured";
     this.cause = cause;
+    if (cause) {
+       this.$javaException = cause.$javaException;
+    }
 }
 TeaVMAsyncError.prototype = new Error();
 TeaVMAsyncError.prototype.constructor = TeaVMAsyncError;