fixes after review

Original commit: 9869fc4305

jps/jps-plugin/src/org/jetbrains/kotlin/compilerRunner/KotlinCompilerRunner.kt

@@ -137,7 +137,7 @@ public object KotlinCompilerRunner {
     internal object getDaemonConnection {
         private @Volatile var connection: DaemonConnection? = null
 
-        @Synchronized operator fun invoke(environment: CompilerEnvironment, messageCollector: MessageCollector): DaemonConnection? {
+        @Synchronized operator fun invoke(environment: CompilerEnvironment, messageCollector: MessageCollector): DaemonConnection {
             if (connection == null) {
                 val libPath = CompilerRunnerUtil.getLibPath(environment.kotlinPaths, messageCollector)
                 val compilerId = CompilerId.makeCompilerId(File(libPath, "kotlin-compiler.jar"))
@@ -159,7 +159,7 @@ public object KotlinCompilerRunner {
                         return flagFile
                     }
                     val daemon = KotlinCompilerClient.connectToCompileService(compilerId, daemonJVMOptions, daemonOptions, DaemonReportingTargets(null, daemonReportMessages), true, true)
-                    connection = DaemonConnection(daemon, daemon?.leaseCompileSession(newFlagFile().absolutePath)?.get() ?:CompileService.NO_SESSION)
+                    connection = DaemonConnection(daemon, daemon?.leaseCompileSession(newFlagFile().absolutePath)?.get() ?: CompileService.NO_SESSION)
                 }
 
                 for (msg in daemonReportMessages) {
@@ -170,7 +170,7 @@ public object KotlinCompilerRunner {
 
                 reportTotalAndThreadPerf("Daemon connect", daemonOptions, messageCollector, profiler)
             }
-            return connection
+            return connection!!
         }
     }
 

jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/SimpleKotlinJpsBuildTest.kt

@@ -88,7 +88,7 @@ public class SimpleKotlinJpsBuildTest : AbstractKotlinJpsBuildTestCase() {
 
 // copied from CompilerDaemonTest.kt
 // TODO: find shared place for this function
-// java.util.logger used in the daemon silently forgets to log into a file specified in the config on Windows,
+// java.util.Logger used in the daemon silently forgets to log into a file specified in the config on Windows,
 // if file path is given in windows form (using backslash as a separator); the reason is unknown
 // this function makes a path with forward slashed, that works on windows too
 internal val File.loggerCompatiblePath: String