Problem: manually shutdown AppScheduledExecutorService to allow compiler stop properly

Without such shutdown console program that gets PSI file will hang forever.

Introduced in https://github.com/JetBrains/intellij-community/commit/446b80077aed71e2384301ae993cf44416bf9a83

Stack example:

 java.lang.Thread.State: RUNNABLE
	  at com.intellij.util.concurrency.AppDelayQueue.<init>(AppDelayQueue.java:37)
	  at com.intellij.util.concurrency.AppScheduledExecutorService.<init>(AppScheduledExecutorService.java:50)
	  at com.intellij.util.concurrency.AppScheduledExecutorService$Holder.<clinit>(AppScheduledExecutorService.java:41)
	  at com.intellij.util.concurrency.AppScheduledExecutorService.getInstance(AppScheduledExecutorService.java:46)
	  at com.intellij.util.concurrency.AppExecutorUtil.getAppScheduledExecutorService(AppExecutorUtil.java:39)
	  at com.intellij.concurrency.JobScheduler.getScheduler(JobScheduler.java:43)
	  at com.intellij.psi.impl.source.AstPathPsiMap.<clinit>(AstPathPsiMap.java:45)
	  at com.intellij.psi.impl.source.PsiFileImpl.<init>(PsiFileImpl.java:76)
	  at com.intellij.extapi.psi.PsiFileBase.<init>(PsiFileBase.java:39)
	  at org.jetbrains.kotlin.psi.KtFile.<init>(KtFile.java:48)
	  at org.jetbrains.kotlin.parsing.KotlinParserDefinition.createFile(KotlinParserDefinition.kt:73)
	  at com.intellij.psi.SingleRootFileViewProvider.createFile(SingleRootFileViewProvider.java:407)
	  at com.intellij.psi.SingleRootFileViewProvider.createFile(SingleRootFileViewProvider.java:348)
	  at com.intellij.psi.SingleRootFileViewProvider.createFile(SingleRootFileViewProvider.java:326)
	  at com.intellij.psi.SingleRootFileViewProvider.getPsiInner(SingleRootFileViewProvider.java:171)
	  at com.intellij.psi.SingleRootFileViewProvider.getPsi(SingleRootFileViewProvider.java:155)
	  at com.intellij.psi.impl.PsiFileFactoryImpl.trySetupPsiForFile(PsiFileFactoryImpl.java:121)
	  at com.intellij.psi.impl.PsiFileFactoryImpl.createFileFromText(PsiFileFactoryImpl.java:100)
	  at com.intellij.psi.impl.PsiFileFactoryImpl.createFileFromText(PsiFileFactoryImpl.java:56)
	  at org.jetbrains.kotlin.psi.KtPsiFactory.doCreateFile(KtPsiFactory.kt:174)
	  at org.jetbrains.kotlin.psi.KtPsiFactory.createFile(KtPsiFactory.kt:178)
	  at org.jetbrains.kotlin.preprocessor.Preprocessor.processFileSingleEvaluator(Preprocessor.kt:82)
	  at org.jetbrains.kotlin.preprocessor.Preprocessor.processDirectorySingleEvaluator(Preprocessor.kt:105)
	  at org.jetbrains.kotlin.preprocessor.Preprocessor.processDirectorySingleEvaluator(Preprocessor.kt:135)
	  at org.jetbrains.kotlin.preprocessor.Preprocessor.processSources(Preprocessor.kt:74)
	  at org.jetbrains.kotlin.preprocessor.PreprocessorCLI.main(PreprocessorCLI.kt:35)

compiler/cli/src/org/jetbrains/kotlin/cli/common/CLICompiler.java

@@ -20,6 +20,8 @@ import com.google.common.base.Predicates;
 import com.intellij.openapi.Disposable;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.openapi.util.SystemInfo;
+import com.intellij.util.concurrency.AppExecutorUtil;
+import com.intellij.util.concurrency.AppScheduledExecutorService;
 import com.sampullara.cli.Args;
 import kotlin.Pair;
 import kotlin.collections.ArraysKt;
@@ -303,9 +305,16 @@ public abstract class CLICompiler<A extends CommonCompilerArguments> {
         // We depend on swing (indirectly through PSI or something), so we want to declare headless mode,
         // to avoid accidentally starting the UI thread
         System.setProperty("java.awt.headless", "true");
-        ExitCode exitCode = doMainNoExit(compiler, args);
-        if (exitCode != OK) {
-            System.exit(exitCode.getCode());
+        try {
+            ExitCode exitCode = doMainNoExit(compiler, args);
+
+            if (exitCode != OK) {
+                System.exit(exitCode.getCode());
+            }
+        }
+        finally {
+            AppScheduledExecutorService service = (AppScheduledExecutorService) AppExecutorUtil.getAppScheduledExecutorService();
+            service.shutdownAppScheduledExecutorService();
         }
     }
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt

@@ -95,6 +95,7 @@ import org.jetbrains.kotlin.script.*
 import org.jetbrains.kotlin.utils.PathUtil
 import org.jetbrains.kotlin.utils.ifEmpty
 import java.io.File
+import java.lang.IllegalStateException
 import java.util.*
 
 class KotlinCoreEnvironment private constructor(