"Cannot create class org.intellij.sequencer.ShowSequenceAction" exception when the Kotlin plugin is disabled

[ljchen1]

Describe the bug When disabling the Kotlin plugin and using this plugin, the IDE will throw an exception. It seems the some code path from org.intellij.sequencer.ShowSequenceAction depends on the Kotlin module and uses it directly without checking as this plugin declares the Kotlin module as an optional.

To Reproduce Steps to reproduce the behavior:

1. Install this plugin and disable the Kotlin plugin.
2. Restart the IDEA and open a project.

Expected behavior No exception throws.

Screenshots

Plugin & IDE info:

• Plugin Version: 2.2.2
• IDE Name & Version: IDEA 2022.2.2

Exception:

com.intellij.diagnostic.PluginException: Cannot create class org.intellij.sequencer.ShowSequenceAction (classloader=PluginClassLoader(plugin=PluginDescriptor(name=SequenceDiagram, id=SequenceDiagram, descriptorPath=plugin.xml, path=~/.local/share/JetBrains/Toolbox/apps/IDEA-U/ch-3/222.4167.29.plugins/SequenceDiagram, version=2.2.2, package=null, isBundled=false), packagePrefix=null, instanceId=172, state=active))
    at com.intellij.serviceContainer.ComponentManagerImpl.instantiateClass(ComponentManagerImpl.kt:883)
    at com.intellij.serviceContainer.ComponentManagerImpl.instantiateClass(ComponentManagerImpl.kt:900)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.instantiate(ActionManagerImpl.java:202)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.convertStub(ActionManagerImpl.java:187)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getActionImpl(ActionManagerImpl.java:528)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getAction(ActionManagerImpl.java:517)
    at com.intellij.openapi.actionSystem.DefaultActionGroup.unStub(DefaultActionGroup.java:409)
    at com.intellij.openapi.actionSystem.DefaultActionGroup.getChildren(DefaultActionGroup.java:365)
    at com.intellij.openapi.actionSystem.ActionGroupStub.initGroup(ActionGroupStub.kt:34)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.convertGroupStub(ActionManagerImpl.java:241)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getActionImpl(ActionManagerImpl.java:528)
    at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.getAction(ActionManagerImpl.java:517)
    at com.intellij.openapi.actionSystem.DefaultActionGroup.unStub(DefaultActionGroup.java:409)
    at com.intellij.openapi.actionSystem.DefaultActionGroup.getChildren(DefaultActionGroup.java:365)
    at com.intellij.openapi.actionSystem.DefaultActionGroup.getChildren(DefaultActionGroup.java:343)
    at com.intellij.ide.ui.customization.CustomizationUtil.getReordableChildren(CustomizationUtil.java:92)
    at com.intellij.ide.ui.customization.CustomisedActionGroup.getChildren(CustomisedActionGroup.java:44)
    at com.intellij.openapi.wm.impl.IdeMenuBar.expandActionGroup(IdeMenuBar.java:509)
    at com.intellij.openapi.wm.impl.IdeMenuBar.doUpdateMenuActions(IdeMenuBar.java:406)
    at com.intellij.openapi.wm.impl.IdeMenuBar.lambda$addNotify$4(IdeMenuBar.java:286)
    at com.intellij.openapi.actionSystem.ex.ActionManagerEx.lambda$doWithLazyActionManager$0(ActionManagerEx.java:111)
    at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:194)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:881)
    at com.intellij.openapi.application.impl.ApplicationImpl$3.run(ApplicationImpl.java:513)
    at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:75)
    at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:118)
    at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:42)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:779)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:730)
    at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:724)
    at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:749)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:918)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:766)
    at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:450)
    at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:791)
    at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:449)
    at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:105)
    at com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:624)
    at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:447)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:881)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:493)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)
Caused by: java.lang.IllegalAccessException: no such constructor: org.intellij.sequencer.ShowSequenceAction.<init>()void/newInvokeSpecial
    at java.base/java.lang.invoke.MemberName.makeAccessException(MemberName.java:972)
    at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:1117)
    at java.base/java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:3649)
    at java.base/java.lang.invoke.MethodHandles$Lookup.findConstructor(MethodHandles.java:2750)
    at com.intellij.serviceContainer.ComponentManagerImpl.instantiateClass(ComponentManagerImpl.kt:844)
    ... 49 more
Caused by: java.lang.NoClassDefFoundError: org/jetbrains/kotlin/idea/KotlinLanguage
    at java.base/java.lang.invoke.MethodHandleNatives.resolve(Native Method)
    at java.base/java.lang.invoke.MemberName$Factory.resolve(MemberName.java:1085)
    at java.base/java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:1114)
    ... 52 more
Caused by: java.lang.ClassNotFoundException: org.jetbrains.kotlin.idea.KotlinLanguage PluginClassLoader(plugin=PluginDescriptor(name=SequenceDiagram, id=SequenceDiagram, descriptorPath=plugin.xml, path=~/.local/share/JetBrains/Toolbox/apps/IDEA-U/ch-3/222.4167.29.plugins/SequenceDiagram, version=2.2.2, package=null, isBundled=false), packagePrefix=null, instanceId=172, state=active)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:214)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
    ... 55 more