diff --git a/libraries/stdlib/src/kotlin/coroutines/experimental/jvm/internal/CoroutineImpl.kt b/libraries/stdlib/src/kotlin/coroutines/experimental/jvm/internal/CoroutineImpl.kt
index d58e4142ba9..f8f9964ded3 100644
--- a/libraries/stdlib/src/kotlin/coroutines/experimental/jvm/internal/CoroutineImpl.kt
+++ b/libraries/stdlib/src/kotlin/coroutines/experimental/jvm/internal/CoroutineImpl.kt
@@ -35,7 +35,7 @@ abstract class CoroutineImpl(
     // label == -1 when coroutine cannot be started (it is just a factory object) or has already finished execution
     // label == 0 in initial part of the coroutine
     @JvmField
-    var label: Int = if (completion != null) 0 else -1
+    protected var label: Int = if (completion != null) 0 else -1
 
     private val _context: CoroutineContext? = completion?.context
 
@@ -71,35 +71,3 @@ abstract class CoroutineImpl(
         throw IllegalStateException("create(Any?;Continuation) has not been overridden")
     }
 }
-
-abstract class CoroutineImplForNamedFunction(
-       completion: Continuation<Any?>?
-) : CoroutineImpl(0, completion), Continuation<Any?> {
-    private companion object {
-        private const val LAST_BIT_MASK = 1 shl 31
-    }
-
-    @JvmField
-    var data: Any? = null
-
-    @JvmField
-    var exception: Throwable? = null
-
-    fun checkAndFlushLastBit(): Boolean {
-        if (label and LAST_BIT_MASK != 0) {
-            label -= LAST_BIT_MASK
-            return true
-        }
-
-        return false
-    }
-
-    override fun doResume(data: Any?, exception: Throwable?): Any? {
-        this.data = data
-        this.exception = exception
-        this.label = this.label or LAST_BIT_MASK
-        return doResume()
-    }
-
-    protected abstract fun doResume(): Any?
-}
diff --git a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-runtime-merged.txt b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-runtime-merged.txt
index 79999e34125..f85204dd2b1 100644
--- a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-runtime-merged.txt
+++ b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib-runtime-merged.txt
@@ -1981,6 +1981,7 @@ public final class kotlin/coroutines/experimental/CoroutinesKt {
 	public static final fun createCoroutine (Lkotlin/jvm/functions/Function2;Ljava/lang/Object;Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
 	public static final fun startCoroutine (Lkotlin/jvm/functions/Function1;Lkotlin/coroutines/experimental/Continuation;)V
 	public static final fun startCoroutine (Lkotlin/jvm/functions/Function2;Ljava/lang/Object;Lkotlin/coroutines/experimental/Continuation;)V
+	public static final fun suspendCoroutine (Lkotlin/jvm/functions/Function1;Lkotlin/coroutines/experimental/Continuation;)Ljava/lang/Object;
 }
 
 public final class kotlin/coroutines/experimental/EmptyCoroutineContext : kotlin/coroutines/experimental/CoroutineContext {
@@ -2028,7 +2029,7 @@ public final class kotlin/coroutines/experimental/intrinsics/IntrinsicsKt {
 
 public abstract class kotlin/coroutines/experimental/jvm/internal/CoroutineImpl : kotlin/jvm/internal/Lambda, kotlin/coroutines/experimental/Continuation {
 	protected field completion Lkotlin/coroutines/experimental/Continuation;
-	public field label I
+	protected field label I
 	public fun <init> (ILkotlin/coroutines/experimental/Continuation;)V
 	public fun create (Ljava/lang/Object;Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
 	public fun create (Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
@@ -2039,16 +2040,6 @@ public abstract class kotlin/coroutines/experimental/jvm/internal/CoroutineImpl
 	public fun resumeWithException (Ljava/lang/Throwable;)V
 }
 
-public abstract class kotlin/coroutines/experimental/jvm/internal/CoroutineImplForNamedFunction : kotlin/coroutines/experimental/jvm/internal/CoroutineImpl, kotlin/coroutines/experimental/Continuation {
-	public static final field Companion Lkotlin/coroutines/experimental/jvm/internal/CoroutineImplForNamedFunction$Companion;
-	public field data Ljava/lang/Object;
-	public field exception Ljava/lang/Throwable;
-	public fun <init> (Lkotlin/coroutines/experimental/Continuation;)V
-	public final fun checkAndFlushLastBit ()Z
-	protected abstract fun doResume ()Ljava/lang/Object;
-	protected fun doResume (Ljava/lang/Object;Ljava/lang/Throwable;)Ljava/lang/Object;
-}
-
 public final class kotlin/coroutines/experimental/jvm/internal/CoroutineIntrinsics {
 	public static final fun normalizeContinuation (Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
 }
diff --git a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt
index 1d4e88f6a0e..c1fb7ca964b 100644
--- a/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt
+++ b/libraries/tools/binary-compatibility-validator/reference-public-api/kotlin-stdlib.txt
@@ -1800,6 +1800,7 @@ public final class kotlin/coroutines/experimental/CoroutinesKt {
 	public static final fun createCoroutine (Lkotlin/jvm/functions/Function2;Ljava/lang/Object;Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
 	public static final fun startCoroutine (Lkotlin/jvm/functions/Function1;Lkotlin/coroutines/experimental/Continuation;)V
 	public static final fun startCoroutine (Lkotlin/jvm/functions/Function2;Ljava/lang/Object;Lkotlin/coroutines/experimental/Continuation;)V
+	public static final fun suspendCoroutine (Lkotlin/jvm/functions/Function1;Lkotlin/coroutines/experimental/Continuation;)Ljava/lang/Object;
 }
 
 public final class kotlin/coroutines/experimental/EmptyCoroutineContext : kotlin/coroutines/experimental/CoroutineContext {
@@ -1847,7 +1848,7 @@ public final class kotlin/coroutines/experimental/intrinsics/IntrinsicsKt {
 
 public abstract class kotlin/coroutines/experimental/jvm/internal/CoroutineImpl : kotlin/jvm/internal/Lambda, kotlin/coroutines/experimental/Continuation {
 	protected field completion Lkotlin/coroutines/experimental/Continuation;
-	public field label I
+	protected field label I
 	public fun <init> (ILkotlin/coroutines/experimental/Continuation;)V
 	public fun create (Ljava/lang/Object;Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
 	public fun create (Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
@@ -1858,16 +1859,6 @@ public abstract class kotlin/coroutines/experimental/jvm/internal/CoroutineImpl
 	public fun resumeWithException (Ljava/lang/Throwable;)V
 }
 
-public abstract class kotlin/coroutines/experimental/jvm/internal/CoroutineImplForNamedFunction : kotlin/coroutines/experimental/jvm/internal/CoroutineImpl, kotlin/coroutines/experimental/Continuation {
-	public static final field Companion Lkotlin/coroutines/experimental/jvm/internal/CoroutineImplForNamedFunction$Companion;
-	public field data Ljava/lang/Object;
-	public field exception Ljava/lang/Throwable;
-	public fun <init> (Lkotlin/coroutines/experimental/Continuation;)V
-	public final fun checkAndFlushLastBit ()Z
-	protected abstract fun doResume ()Ljava/lang/Object;
-	protected fun doResume (Ljava/lang/Object;Ljava/lang/Throwable;)Ljava/lang/Object;
-}
-
 public final class kotlin/coroutines/experimental/jvm/internal/CoroutineIntrinsics {
 	public static final fun normalizeContinuation (Lkotlin/coroutines/experimental/Continuation;)Lkotlin/coroutines/experimental/Continuation;
 }