Fix warnings after update to 202 platform

#KT-44069 Fixed

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreApplicationEnvironment.java

@@ -10,11 +10,10 @@ import com.intellij.codeInsight.runner.JavaMainMethodProvider;
 import com.intellij.core.JavaCoreApplicationEnvironment;
 import com.intellij.lang.MetaLanguage;
 import com.intellij.openapi.Disposable;
-import com.intellij.openapi.extensions.Extensions;
+import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.openapi.vfs.VirtualFileSystem;
 import com.intellij.psi.FileContextProvider;
 import com.intellij.psi.augment.PsiAugmentProvider;
-import com.intellij.psi.compiled.ClassFileDecompilers;
 import com.intellij.psi.meta.MetaDataContributor;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -43,7 +42,7 @@ public class KotlinCoreApplicationEnvironment extends JavaCoreApplicationEnviron
 
         registerApplicationExtensionPoint(MetaLanguage.EP_NAME, MetaLanguage.class);
 
-        IdeaExtensionPoints.INSTANCE.registerVersionSpecificAppExtensionPoints(Extensions.getRootArea());
+        IdeaExtensionPoints.INSTANCE.registerVersionSpecificAppExtensionPoints(ApplicationManager.getApplication().getExtensionArea());
     }
 
     @Nullable

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

@@ -25,11 +25,11 @@ import com.intellij.ide.highlighter.JavaFileType
 import com.intellij.lang.java.JavaParserDefinition
 import com.intellij.mock.MockProject
 import com.intellij.openapi.Disposable
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.application.TransactionGuard
 import com.intellij.openapi.application.TransactionGuardImpl
 import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.diagnostic.Logger
-import com.intellij.openapi.extensions.Extensions
 import com.intellij.openapi.extensions.ExtensionsArea
 import com.intellij.openapi.fileTypes.PlainTextFileType
 import com.intellij.openapi.project.Project
@@ -42,7 +42,6 @@ import com.intellij.openapi.vfs.impl.ZipHandler
 import com.intellij.pom.java.LanguageLevel
 import com.intellij.psi.PsiElementFinder
 import com.intellij.psi.PsiManager
-import com.intellij.psi.compiled.ClassFileDecompilers
 import com.intellij.psi.impl.JavaClassSupersImpl
 import com.intellij.psi.impl.PsiElementFinderImpl
 import com.intellij.psi.impl.PsiTreeChangePreprocessor
@@ -530,7 +529,7 @@ class KotlinCoreEnvironment private constructor(
             registerApplicationExtensionPointsAndExtensionsFrom(configuration, "extensions/compiler.xml")
             // FIX ME WHEN BUNCH 202 REMOVED: this code is required to support compiler bundled to both 202 and 203.
             // Please, remove "com.intellij.psi.classFileDecompiler" EP registration once 202 is no longer supported by the compiler
-            if (!Extensions.getRootArea().hasExtensionPoint("com.intellij.psi.classFileDecompiler")) {
+            if (!ApplicationManager.getApplication().extensionArea.hasExtensionPoint("com.intellij.psi.classFileDecompiler")) {
                 registerApplicationExtensionPointsAndExtensionsFrom(configuration, "extensions/core.xml")
             }
 
@@ -564,7 +563,7 @@ class KotlinCoreEnvironment private constructor(
             CoreApplicationEnvironment.registerExtensionPointAndExtensions(
                 FileSystems.getDefault().getPath(pluginRoot.path),
                 configFilePath,
-                Extensions.getRootArea()
+                ApplicationManager.getApplication().extensionArea
             )
         }
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/KotlinCoreEnvironment.kt.as42

@@ -25,11 +25,11 @@ import com.intellij.ide.highlighter.JavaFileType
 import com.intellij.lang.java.JavaParserDefinition
 import com.intellij.mock.MockProject
 import com.intellij.openapi.Disposable
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.application.TransactionGuard
 import com.intellij.openapi.application.TransactionGuardImpl
 import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.diagnostic.Logger
-import com.intellij.openapi.extensions.Extensions
 import com.intellij.openapi.extensions.ExtensionsArea
 import com.intellij.openapi.fileTypes.PlainTextFileType
 import com.intellij.openapi.project.DumbUtil
@@ -123,7 +123,7 @@ class KotlinCoreEnvironment private constructor(
         private var extensionRegistered = false
 
         override fun preregisterServices() {
-            registerProjectExtensionPoints(Extensions.getArea(project))
+            registerProjectExtensionPoints(project.extensionArea)
         }
 
         fun registerExtensionsFromPlugins(configuration: CompilerConfiguration) {
@@ -552,7 +552,7 @@ class KotlinCoreEnvironment private constructor(
             CoreApplicationEnvironment.registerExtensionPointAndExtensions(
                 FileSystems.getDefault().getPath(pluginRoot.path),
                 configFilePath,
-                Extensions.getRootArea()
+                ApplicationManager.getApplication().extensionArea
             )
         }
 
@@ -621,9 +621,9 @@ class KotlinCoreEnvironment private constructor(
         @JvmStatic
         fun registerProjectExtensionPoints(area: ExtensionsArea) {
             CoreApplicationEnvironment.registerExtensionPoint(
-                area, PsiTreeChangePreprocessor.EP_NAME, PsiTreeChangePreprocessor::class.java
+                area, PsiTreeChangePreprocessor.EP.name, PsiTreeChangePreprocessor::class.java
             )
-            CoreApplicationEnvironment.registerExtensionPoint(area, PsiElementFinder.EP_NAME, PsiElementFinder::class.java)
+            CoreApplicationEnvironment.registerExtensionPoint(area, PsiElementFinder.EP.name, PsiElementFinder::class.java)
 
             IdeaExtensionPoints.registerVersionSpecificProjectExtensionPoints(area)
         }
@@ -631,7 +631,10 @@ class KotlinCoreEnvironment private constructor(
         // made public for Upsource
         @JvmStatic
         @Deprecated("Use registerProjectServices(project) instead.", ReplaceWith("registerProjectServices(projectEnvironment.project)"))
-        fun registerProjectServices(projectEnvironment: JavaCoreProjectEnvironment, messageCollector: MessageCollector?) {
+        fun registerProjectServices(
+            projectEnvironment: JavaCoreProjectEnvironment,
+            @Suppress("UNUSED_PARAMETER") messageCollector: MessageCollector?
+        ) {
             registerProjectServices(projectEnvironment.project)
         }
 
@@ -666,12 +669,15 @@ class KotlinCoreEnvironment private constructor(
                 @Suppress("UnstableApiUsage")
                 registerService(DumbUtil::class.java, KotlinCoreDumbUtil())
 
-                val area = Extensions.getArea(this)
-
-                area.getExtensionPoint(PsiElementFinder.EP_NAME).registerExtension(JavaElementFinder(this, kotlinAsJavaSupport))
-                area.getExtensionPoint(PsiElementFinder.EP_NAME).registerExtension(
-                    PsiElementFinderImpl(this, ServiceManager.getService(this, JavaFileManager::class.java))
-                )
+                // We don't pass Disposable because in some tests, we manually unregister these extensions, and that leads to LOG.error
+                // exception from `ExtensionPointImpl.doRegisterExtension`, because the registered extension can no longer be found
+                // when the project is being disposed.
+                // For example, see the `unregisterExtension` call in `GenerationUtils.compileFilesUsingFrontendIR`.
+                // TODO: refactor this to avoid registering unneeded extensions in the first place, and avoid using deprecated API.
+                @Suppress("DEPRECATION")
+                PsiElementFinder.EP.getPoint(project).registerExtension(JavaElementFinder(this, kotlinAsJavaSupport))
+                @Suppress("DEPRECATION")
+                PsiElementFinder.EP.getPoint(project).registerExtension(PsiElementFinderImpl(this))
             }
         }
 

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/index/JvmDependenciesIndexImpl.kt

@@ -45,7 +45,8 @@ class JvmDependenciesIndexImpl(_roots: List<JavaRoot>) : JvmDependenciesIndex {
         // indices of roots that are known to contain this package
         // if this list contains [1, 3, 5] then roots with indices 1, 3 and 5 are known to contain this package, 2 and 4 are known not to (no information about roots 6 or higher)
         // if this list contains maxIndex that means that all roots containing this package are known
-        val rootIndices = IntArrayList(2)
+        @Suppress("DEPRECATION") // TODO: fix deprecation
+        val rootIndices = com.intellij.util.containers.IntArrayList(2)
     }
 
     // root "Cache" object corresponds to DefaultPackage which exists in every root. Roots with non-default fqname are also listed here but