Incompatible Changes in IntelliJ Platform and Plugins API 2020.*

Please see Verifying Plugin Compatibility on how to use Plugin Verifier and IDE inspections to check such problems.

Early Access Program (EAP) releases of upcoming versions are available here.

2020.3

IntelliJ Platform 2020.3

com.intellij.openapi.application.NonBlockingReadAction.finishOnUiThread method parameter type changed from Consumer<T> to Consumer<? super T>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.openapi.diagnostic.ErrorReportSubmitter.submit method parameter type changed from Consumer<SubmittedReportInfo> to Consumer<? super SubmittedReportInfo>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.execution.ui.ConsoleView.attachToProcess method ProcessHandler parameter marked @NotNull: This may break source-compatibility with inheritors written in Kotlin if they declare parameter type as nullable.
com.intellij.util.indexing.FileContentImpl(VirtualFile, byte[]) constructor removed: Constructors of FileContentImpl were replaced with factory methods, use FileContentImpl#createByContent(VirtualFile, byte[]).
com.intellij.spellchecker.quickfixes.ChangeTo(String) constructor removed: Replaced with ChangeTo(String, PsiElement, TextRange).
com.intellij.spellchecker.tokenizer.SpellcheckingStrategy.getDefaultRegularFixes(boolean, String, PsiElement) method removed: Replaced with SpellcheckingStrategy.getDefaultRegularFixes(boolean, String, PsiElement, TextRange).
com.intellij.psi.stubs.IStubElementType.createStub method parameter type changed from StubElement to StubElement<?>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.execution.application.ApplicationConfiguration.isSwingInspectorEnabled() method removed: The Swing Inspector functionality has been removed from the product.
com.intellij.execution.application.ApplicationConfiguration.setSwingInspectorEnabled(boolean) method removed: The Swing Inspector functionality has been removed from the product.
show.swing.inspector property removed from resource bundle messages.ExecutionBundle: The Swing Inspector functionality has been removed from the product.
show.swing.inspector.disabled property removed from resource bundle messages.ExecutionBundle: The Swing Inspector functionality has been removed from the product.

Java Plugin 2020.3

The PSI structure of multi-dimensional arrays in Java source files changed (see com.intellij.psi.PsiTypeElement): Now the children are flattened: brackets for all the dimensions are direct children of the PsiTypeElement that represent the multi-dimensional array. This change doesn't break source or binary compatibility but may produce behavioral changes in the code that traverses the tree of Java source files.
The com.intellij.psi.PsiAnnotation.getOwner method now returns PsiType instead of PsiTypeElement for type annotations in Java source files: This change supports identifying whether a type annotation is attached to an inner class or a particular dimension of a multi-dimensional array. This change doesn't break source or binary compatibility but may produce behavioral changes for callers.

PhpStorm and PHP Plugin 2020.3

Added PHP 8 support: See Breaking Changes in PhpStorm 2020.3.

Python Plugin 2020.3

All parameters in com.jetbrains.python.psi.PyElementVisitor marked @NotNull: This may break source-compatibility with inheritors written in Kotlin.
com.jetbrains.python.parsing.ParsingContext(SyntaxTreeBuilder, LanguageLevel, StatementParsing.FUTURE) method parameter StatementParsing.FUTURE removed: It is no longer used in parsing.
com.jetbrains.python.parsing.StatementParsing(ParsingContext, StatementParsing.FUTURE) method parameter StatementParsing.FUTURE removed: It is no longer used in parsing.
com.jetbrains.python.parsing.StatementParsing.FUTURE class removed: Use com.jetbrains.python.psi.FutureFeature instead.
com.jetbrains.python.sdk.PythonSdkUpdater.updateOrShowError(Sdk, SdkModificator, Project, Component) method parameter SdkModificator removed: It was not processed carefully, it should be enough to pass editable SDK instead.
python.sdk.interpreter.field.is.empty property removed from resource bundle messages.PyBundle: Use python.sdk.field.is.empty from messages.PySdkBundle instead.
base.interpreter property removed from resource bundle messages.PyBundle: Use python.venv.base.label from messages.PySdkBundle instead.
interpreter property removed from resource bundle messages.PyBundle: Use python.interpreter.label from messages.PySdkBundle instead.
com.jetbrains.python.psi.LanguageLevel.hasWithStatement() method removed: It is true for all supported python versions.

CLion/AppCode 2020.3

Required changes in project setup: When targeting 2020.3, please see this migration guide.

2020.2

IntelliJ Platform 2020.2

Support for JavaFX deprecated: Plugins should migrate to JCEF. Alternatively, add an explicit dependency on JavaFX Runtime for Plugins.
com.intellij.psi.util.PsiTreeUtil.processElements(element, processor) method parameter type changed from PsiElementProcessor to PsiElementProcessor<PsiElement>: This may break source-compatibility with clients that pass a more specific processor. Passing a more specific processor was illegal before because the processElements passes every descendant PsiElement to the processor regardless of its type. However, this worked with some poorly written clients, e.g. PsiElementProcessor.CollectFilteredElements and PsiElementProcessor.FindFilteredElement (both deprecated now). To simplify the migration, a new three-arg processElements(element, elementClass, processor) is introduced that filters by element class. In most cases, the simplest migration would be to add a wanted element class as a second argument. However, it's advised to use SyntaxTraverser API instead, which is more rich and flexible.
com.maddyhome.idea.copyright.util.FileTypeUtil.getFileTypeByName(String) method removed: This was an internal utility method not intended for use in plugins. Use FileTypeManager.getInstance().findFileTypeByName() instead.
javassist package removed: Javassist library was removed, bundle it with your plugin instead.
com.intellij.compiler.backwardRefs.LanguageCompilerRefAdapter.INSTANCES field removed: This field leaked instances of plugin's extensions on plugin unloading. Use com.intellij.compiler.backwardRefs.LanguageCompilerRefAdapter#EP_NAME.getExtensionList() directly instead.
groovy.util.AntBuilder class removed: Add org.codehaus.groovy:groovy-ant dependency.
groovy.util.GroovyTestCase class removed: Add org.codehaus.groovy:groovy-test dependency.
groovy.util.GroovyTestSuite class removed: Add org.codehaus.groovy:groovy-test dependency.
groovy.json.internal package removed: Use classes from org.apache.groovy.json.internal package.
com.intellij.openapi.externalSystem.service.execution.TaskCompletionProvider(Project, ProjectSystemId, TextAccessor, Options) constructor parameter type changed from groovyjarjarcommonscli.Options to org.apache.commons.cli.Options: Update inheritors accordingly.
org.jetbrains.plugins.gradle.service.execution.cmd.GradleCommandLineOptionsProvider.getSupportedOptions() method return type changed from groovyjarjarcommonscli.Options to org.apache.commons.cli.Options: Update call sites accordingly.
com.intellij.openapi.editor.markup.MarkupModel.addLineHighlighter(TextAttributesKey, int, int) abstract method added: Use it instead of MarkupModel.addLineHighlighter(int, int, TextAttributes).
com.intellij.openapi.editor.markup.MarkupModel.addRangeHighlighter(TextAttributesKey, int, int, int, HighlighterTargetArea) abstract method added: Use it instead of MarkupModel.addRangeHighlighter(int, int, int, TextAttributes, HighlighterTargetArea).
com.intellij.codeInsight.daemon.LineMarkerProvider.getLineMarkerInfo method return type changed from LineMarkerInfo to LineMarkerInfo<?>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.codeInsight.daemon.LineMarkerProvider.collectSlowLineMarkers method parameter type changed from List<PsiElement> to List<? extends PsiElement>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.codeInsight.daemon.LineMarkerProvider.collectSlowLineMarkers method parameter type changed from List<PsiElement> to Collection<? super LineMarkerInfo<?>>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.util.indexing.FileBasedIndex.FileTypeSpecificInputFilter.registerFileTypesUsedForIndexing method parameter type changed from Consumer<FileType> to Consumer<? super FileType>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.psi.impl.include.FileIncludeProvider.registerFileTypesUsedForIndexing method parameter type changed from Consumer<FileType> to Consumer<? super FileType>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.codeInsight.highlighting.HighlightUsagesHandlerBase.selectTargets method parameter type changed from List<T> to List<? extends T>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.codeInsight.highlighting.HighlightUsagesHandlerBase.selectTargets method parameter type changed from Consumer<List<? extends T>> to Consumer<? super List<? extends T>>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.codeInsight.highlighting.HighlightUsagesHandlerBase.computeUsages method parameter type changed from List<T> to List<? extends T>: This may break source-compatibility with inheritors written in Kotlin.
com.intellij.pom.java.LanguageLevel.JDK_13_PREVIEW field removed: Please remove the plugin code supporting Java 13 language level features. IntelliJ IDEA supports preview features of the latest Java release and one upcoming release (if available).

VCS

com.intellij.diff.util.DiffUserDataKeysEx.REVISION_INFO field removed: Use com.intellij.diff.DiffVcsDataKeys.REVISION_INFO instead.
com.intellij.codeInsight.actions.FormatChangedTextUtil.getChangedElements(Project, Change[], Function) method removed: Use com.intellij.codeInsight.actions.VcsFacadeImpl.getVcsInstance().getChangedElements(...) instead.

GitHub Plugin 2020.2

org.jetbrains.plugins.github.util.LazyCancellableBackgroundProcessValue(ProgressManager) constructor removed: Required for more tight control of task scheduling. Use org.jetbrains.plugins.github.util.LazyCancellableBackgroundProcessValue.Companion#create(ProgressManager, (ProgressIndicator) -> T) instead of subclassing.
org.jetbrains.plugins.github.util.LazyCancellableBackgroundProcessValue.compute(ProgressIndicator) method return type changed from T to CompletableFuture<T>: Required for more tight control of task scheduling. Use org.jetbrains.plugins.github.util.LazyCancellableBackgroundProcessValue.Companion#create(ProgressManager, (ProgressIndicator) -> T) instead of subclassing.
org.jetbrains.plugins.github.pullrequest.ui.GHCompletableFutureLoadingModel() constructor removed: Model was made disposable and it is now required to pass parent disposable in constructor.
org.jetbrains.plugins.github.util.GithubGitHelper.getPossibleRemoteUrlCoordinates() method removed: Use org.jetbrains.plugins.github.util.GHProjectRepositoriesManager.getKnownRepositories() instead.

Groovy Plugin 2020.2

org.jetbrains.plugins.groovy.formatter.AlignmentProvider.addPair method parameter type changed from Boolean to boolean: Please adjust/recompile the code.

Java EE Plugins 2020.2

Java EE plugins split

Plugin com.intellij.javaee Java EE: EJB, JPA, Servlets has been split to:

com.inteellij.javaee Java EE Platform - main plugin other JavaEE/Jakarta plugins depend on
com.intellij.javaee.app.servers.integration Java EE: Application Servers Integration
com.intellij.javaee.ejb Java EE: Enterprise Java Beans (EJB)
com.intellij.javaee.jpa Java EE: JPA
com.intellij.javaee.web Java EE: Web/Servlets

JavaScript Plugin 2020.2

com.intellij.lang.javascript.linter.jslint package removed: JSLint functionality has been unbundled and moved to a separate plugin. Issue

PhpStorm and PHP Plugin 2020.2

Added Union Types Support: See Breaking Changes in PhpStorm 2020.2.

Kotlin Plugin 1.4

org.jetbrains.kotlin.idea.core.formatter.KotlinCodeStyleSettings.PACKAGES_TO_USE_STAR_IMPORTS field type changed from PackageEntryTable to KotlinPackageEntryTable: This change was required to implement import layout order for Kotlin. KotlinPackageEntryTable can be used in the same manner as PackageEntryTable.

Python Plugin 2020.2

com.jetbrains.python.PythonDialectsTokenSetProvider.INSTANCE field removed: PythonDialectsTokenSetProvider became an application service, use PythonDialectsTokenSetProvider.getInstance() instead.
com.jetbrains.python.psi.PyUtil.getLanguageLevelForVirtualFile(Project, VirtualFile) method removed: Use PythonLanguageLevelPusher.getLanguageLevelForVirtualFile(Project, VirtualFile) instead.

2020.1

IntelliJ Platform 2020.1

com.intellij.compiler.ant package removed

'Generate Ant build' functionality is removed from the IDE. Delete the code extending this or replace it with a dependency on the generate-ant plugin.

org.jetbrains.jps.incremental.ModuleLevelBuilder.getCompilableFileExtensions marked abstract

Implement it in ModuleLevelBuilder's implementation.

com.intellij.codeInsight.TargetElementUtilBase class removed

Use com.intellij.codeInsight.TargetElementUtil instead.

com.intellij.psi.stubs.PrebuiltStubsProviderBase class now extends com.intellij.index.PrebuiltIndexProvider and inherits its abstract method getIndexRoot()

Use com.intellij.psi.stubs.PlatformPrebuiltStubsProviderBase instead.

com.intellij.psi.PsiElementVisitor.visitElement method PsiElement parameter marked @NotNull