diff --git a/.idea/artifacts/dist.xml b/.idea/artifacts/dist.xml
index 71fa8861616..3a7e56567a7 100644
--- a/.idea/artifacts/dist.xml
+++ b/.idea/artifacts/dist.xml
@@ -8,16 +8,16 @@
         </element>
       </element>
       <element id="file-copy" path="$PROJECT_DIR$/build/build.txt" />
-      <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-minimal-for-test/1.3.50-dev-44/2ab45e61d8a5d6152e73a7dc414b5cadc75499e/kotlin-stdlib-minimal-for-test-1.3.50-dev-44.jar" output-file-name="kotlin-stdlib-minimal-for-test.jar" />
+      <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-minimal-for-test/1.3.50-dev-397/9537914625d42146d9ebdd50cc7427c1116958dd/kotlin-stdlib-minimal-for-test-1.3.50-dev-397.jar" output-file-name="kotlin-stdlib-minimal-for-test.jar" />
       <element id="directory" name="common">
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.50-dev-44/8bde60f10db41606023cfbc7292e54db1ff6cffa/kotlin-stdlib-common-1.3.50-dev-44.jar" output-file-name="kotlin-stdlib-common.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.50-dev-44/5e061cac6874acae14a78dfbc1c8222b576d44ca/kotlin-stdlib-common-1.3.50-dev-44-sources.jar" output-file-name="kotlin-stdlib-common-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.50-dev-397/41d9c6981aea1e2b3be9491c0d69f068cfeda9d8/kotlin-stdlib-common-1.3.50-dev-397.jar" output-file-name="kotlin-stdlib-common.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.3.50-dev-397/908a2bdb953a6cc1e0ee306066b435c7469bc1/kotlin-stdlib-common-1.3.50-dev-397-sources.jar" output-file-name="kotlin-stdlib-common-sources.jar" />
       </element>
       <element id="directory" name="js">
-        <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-44/33beb8495b0e12f5bd1637e3e73fb4f84bbdc8ed/kotlin-stdlib-js-1.3.50-dev-44.jar" path-in-jar="/" />
+        <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-397/8fecb29089c335c4cb37f2ae37f204bd8c0a015/kotlin-stdlib-js-1.3.50-dev-397.jar" path-in-jar="/" />
       </element>
       <element id="directory" name="maven">
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-44/5ec54eaa4808a4a086b12602ac29dc41d25f1f23/kotlin-stdlib-1.3.50-dev-44-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-397/49551e2d0590be904a7178f881a90753425fe8e0/kotlin-stdlib-1.3.50-dev-397-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
       </element>
       <element id="directory" name="kotlinc">
         <element id="artifact" artifact-name="kotlinc" />
diff --git a/.idea/artifacts/kotlin_compiler_jar.xml b/.idea/artifacts/kotlin_compiler_jar.xml
index ca6cb26e77c..1f03648e866 100644
--- a/.idea/artifacts/kotlin_compiler_jar.xml
+++ b/.idea/artifacts/kotlin_compiler_jar.xml
@@ -8,7 +8,7 @@
         </element>
         <element id="file-copy" path="$PROJECT_DIR$/prepare/compiler/build/tmp/packCompiler/MANIFEST.MF" />
       </element>
-      <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/builtins/1.3.50-dev-44/4c5476adb3f63101bb1081d80cd403a15ed23e33/builtins-1.3.50-dev-44.jar" path-in-jar="/" />
+      <element id="extracted-dir" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/builtins/1.3.50-dev-397/842ec330289185e9ea136dd86f2846b6ff9a8a10/builtins-1.3.50-dev-397.jar" path-in-jar="/" />
       <element id="extracted-dir" path="$PROJECT_DIR$/dependencies/repo/kotlin.build/ideaIC/191.6707.61/artifacts/lib/asm-all-7.0.1.jar" path-in-jar="/" />
       <element id="extracted-dir" path="$PROJECT_DIR$/dependencies/repo/kotlin.build/ideaIC/191.6707.61/artifacts/lib/guava-25.1-jre.jar" path-in-jar="/" />
       <element id="extracted-dir" path="$PROJECT_DIR$/dependencies/repo/kotlin.build/intellij-core/191.6707.61/artifacts/intellij-core.jar" path-in-jar="/" />
diff --git a/.idea/artifacts/kotlinc.xml b/.idea/artifacts/kotlinc.xml
index 6d79fd83f26..c7be86444b7 100644
--- a/.idea/artifacts/kotlinc.xml
+++ b/.idea/artifacts/kotlinc.xml
@@ -226,14 +226,14 @@
             <element id="file-copy" path="$PROJECT_DIR$/plugins/android-extensions/android-extensions-compiler/build/tmp/jar/MANIFEST.MF" />
           </element>
         </element>
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.50-dev-44/8d2ae55affc6cc86a374549069d09b5e0be0e47c/kotlin-stdlib-jdk8-1.3.50-dev-44.jar" output-file-name="kotlin-stdlib-jdk8.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.50-dev-44/dffceac937d7512a41e59bf30ef344c6f57351c6/kotlin-stdlib-jdk7-1.3.50-dev-44.jar" output-file-name="kotlin-stdlib-jdk7.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-44/b58373f75ae8a9cdb2af2fadd2d487d108641cd9/kotlin-stdlib-1.3.50-dev-44.jar" output-file-name="kotlin-stdlib.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.50-dev-44/65317a8b7c2b791f986f2282a484655b6a22c725/kotlin-stdlib-jdk7-1.3.50-dev-44-sources.jar" output-file-name="kotlin-stdlib-jdk7-sources.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.50-dev-44/e29057eddb9f6146534eabbaab3cc5fddb9fd866/kotlin-stdlib-jdk8-1.3.50-dev-44-sources.jar" output-file-name="kotlin-stdlib-jdk8-sources.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-44/2120f0a610ec91bfede238b772be9c7e9fcc914/kotlin-stdlib-js-1.3.50-dev-44-sources.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-44/33beb8495b0e12f5bd1637e3e73fb4f84bbdc8ed/kotlin-stdlib-js-1.3.50-dev-44.jar" output-file-name="kotlin-stdlib-js.jar" />
-        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-44/5ec54eaa4808a4a086b12602ac29dc41d25f1f23/kotlin-stdlib-1.3.50-dev-44-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.50-dev-397/cea97f07f62c8c851aca7dc9710d9c0214b585ad/kotlin-stdlib-jdk8-1.3.50-dev-397.jar" output-file-name="kotlin-stdlib-jdk8.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.50-dev-397/37b7a5e6a0178c1ef97d486c2baaab0b07e119d9/kotlin-stdlib-jdk7-1.3.50-dev-397.jar" output-file-name="kotlin-stdlib-jdk7.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-397/a49478f35e92b4bf2e1a3bd628dc71e561d2eb04/kotlin-stdlib-1.3.50-dev-397.jar" output-file-name="kotlin-stdlib.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk7/1.3.50-dev-397/d87ad86ff1d0f960c89bee95c4f643297e54f9f1/kotlin-stdlib-jdk7-1.3.50-dev-397-sources.jar" output-file-name="kotlin-stdlib-jdk7-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-jdk8/1.3.50-dev-397/1f51a4f91853cfea7a295fd3154b11ed16d64932/kotlin-stdlib-jdk8-1.3.50-dev-397-sources.jar" output-file-name="kotlin-stdlib-jdk8-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-397/a6fb09cf5de9f1afa10699ae2b58156067307cd/kotlin-stdlib-js-1.3.50-dev-397-sources.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.3.50-dev-397/8fecb29089c335c4cb37f2ae37f204bd8c0a015/kotlin-stdlib-js-1.3.50-dev-397.jar" output-file-name="kotlin-stdlib-js.jar" />
+        <element id="file-copy" path="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/1.3.50-dev-397/49551e2d0590be904a7178f881a90753425fe8e0/kotlin-stdlib-1.3.50-dev-397-sources.jar" output-file-name="kotlin-stdlib-sources.jar" />
         <element id="artifact" artifact-name="kotlin-compiler.jar" />
         <element id="artifact" artifact-name="kotlin-reflect.jar" />
         <element id="artifact" artifact-name="kotlin-daemon-client.jar" />
diff --git a/build.gradle.kts b/build.gradle.kts
index b3ab8217aef..f30bcad266c 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -9,7 +9,7 @@ buildscript {
     extra["defaultSnapshotVersion"] = "1.3-SNAPSHOT"
 
     // when updating please also update JPS artifacts configuration: https://jetbrains.quip.com/zzGUAYSJ6gv3/JPS-Build-update-bootstrap
-    kotlinBootstrapFrom(BootstrapOption.TeamCity("1.3.50-dev-44", onlySuccessBootstrap = false))
+    kotlinBootstrapFrom(BootstrapOption.TeamCity("1.3.50-dev-397", onlySuccessBootstrap = false))
 
     repositories.withRedirector(project) {
         bootstrapKotlinRepo?.let(::maven)
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 1c2d5477d2a..c393b89da79 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
@@ -2760,6 +2760,7 @@ 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 {