diff --git a/.idea/misc.xml b/.idea/misc.xml
index c7404941a41..202f4e6f5f7 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -54,7 +54,7 @@
   <component name="ProjectResources">
     <default-html-doctype>http://www.w3.org/1999/xhtml</default-html-doctype>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" default="false" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
   <component name="WebServicesPlugin" addRequiredLibraries="true" />
diff --git a/compiler/compiler.pro b/compiler/compiler.pro
index 1f11a834d47..eb98a2cffd3 100644
--- a/compiler/compiler.pro
+++ b/compiler/compiler.pro
@@ -93,7 +93,6 @@ messages/**)
 
 # for gradle plugin and other server tools
 -keep class com.intellij.openapi.util.io.ZipFileCache { public *; }
-#-keep class com.intellij.openapi.util.LowMemoryWatcher { public *; }
 
 # for j2k
 -keep class com.intellij.codeInsight.NullableNotNullManager { public protected *; }
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/FinishBuildListener.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/FinishBuildListener.kt
index 671bd6557d7..55591175725 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/FinishBuildListener.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/FinishBuildListener.kt
@@ -39,8 +39,7 @@ private fun comparableVersionStr(version: String) =
                 ?.drop(1)?.take(2)
                 // checking if two subexpression groups are found and length of each is >0 and <4
                 ?.let { if (it.all { (it?.value?.length() ?: 0).let { it > 0 && it < 4 }}) it else null }
-                ?.map { "%3s".format(it?.value ?: 0).replace(' ', '0') }
-                ?.joinToString(".")
+                ?.joinToString(".", transform = { it!!.value.padStart(3, '0') })
 
 
 class FinishBuildListener(pluginClassLoader: ClassLoader?, val startMemory: Long) : BuildAdapter() {
@@ -80,7 +79,7 @@ class FinishBuildListener(pluginClassLoader: ClassLoader?, val startMemory: Long
 
         // the value reported here is not necessarily a leak, since it is calculated before collecting the plugin classes
         // but on subsequent runs in the daemon it should be rather small, then the classes are actually reused by the daemon (see above)
-        getUsedMemoryKb().let { log.kotlinDebug("[PERF] Used memory after build: $it kb (${"%+d".format(it-startMemory)} kb)") }
+        getUsedMemoryKb().let { log.kotlinDebug("[PERF] Used memory after build: $it kb (${"%+d".format(it - startMemory)} kb)") }
     }
 }
 
@@ -93,11 +92,8 @@ class CompilerServicesCleanup(private var pluginClassLoader: ClassLoader?) {
 
         log.kotlinDebug("compiler services cleanup")
 
-        // \todo remove ZipFileCache cleanup after switching to recent idea libs
+        // TODO: remove ZipFileCache cleanup after switching to recent idea libs
         stopZipFileCache()
-        // currently unused since LowMemoryWatcher usages are (hopefully) all removed
-        // \todo doublecheck and remove LowMemoryWatcher cleanup code
-        //stopLowMemoryWatcher()
         stopJobScheduler()
 
         pluginClassLoader = null
@@ -108,11 +104,6 @@ class CompilerServicesCleanup(private var pluginClassLoader: ClassLoader?) {
         log.kotlinDebug("ZipFileCache finished successfully")
     }
 
-    private fun stopLowMemoryWatcher() {
-        callVoidStaticMethod("com.intellij.openapi.util.LowMemoryWatcher", "stopAll")
-        log.kotlinDebug("LowMemoryWatcher finished successfully")
-    }
-
     private fun stopJobScheduler() {
         log.kotlinDebug("Stop JobScheduler")
 
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPluginWrapper.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPluginWrapper.kt
index 064143e0ac7..53b370181bb 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPluginWrapper.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinPluginWrapper.kt
@@ -15,7 +15,7 @@ import java.lang.reflect.Method
 import org.jetbrains.kotlin.gradle.tasks.KotlinTasksProvider
 import java.net.URLClassLoader
 
-// \todo simplify: the complicated structure is a leftover from dynamic loading of plugin core, could be significantly simplified now
+// TODO: simplify: the complicated structure is a leftover from dynamic loading of plugin core, could be significantly simplified now
 
 abstract class KotlinBasePluginWrapper: Plugin<Project> {