java.lang.reflect.InvocationTargetException when trying to inline a method

This reproducer attempt doesn't manifest the issue in its isolated form since I didn't manage to distill a working reproducer. I can 100% reproduce with this snippet it in my codebase, but couldn't figure what the missing parts are. Hopefully, along with the stack trace there might be a hint into where the problem could be.

```java
import java.util.Collection;
import java.util.List;

public abstract class A {

protected static void assertContentEquals(Collection expected, Collection actual, String message) {
List.of(actual);
}
}
```
```java
import java.util.List;
import java.util.Set;

import A;

class B extends A {

public void remove() {
Set s1 = Set.of("A");
Set s2 = Set.of('a');
Set s3 = Set.of(1);
Set s4 = Set.of(1l);
var remaining = List.of(s1, s2, s3, s4);
assertContentEquals(remaining, remaining, "A");
}
}
```
When trying to inline `assertContentEquals` (highlight it and alt+shft+i), choose Preview.

```
java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:387)
at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.run(RefactoringWizardDialog2.java:337)
at org.eclipse.ltk.ui.refactoring.RefactoringWizard.createChange(RefactoringWizard.java:674)
at org.eclipse.ltk.ui.refactoring.RefactoringWizard.computeUserInputSuccessorPage(RefactoringWizard.java:511)
at org.eclipse.ltk.ui.refactoring.UserInputWizardPage.computeSuccessorPage(UserInputWizardPage.java:77)
at org.eclipse.ltk.ui.refactoring.UserInputWizardPage.getNextPage(UserInputWizardPage.java:115)
at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2.nextOrPreviewPressed(RefactoringWizardDialog2.java:517)
at org.eclipse.ltk.internal.ui.refactoring.RefactoringWizardDialog2$1.widgetSelected(RefactoringWizardDialog2.java:724)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:290)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:91)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4363)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1217)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4161)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3749)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:819)
at org.eclipse.jface.window.Window.open(Window.java:799)
at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.lambda$0(RefactoringWizardOpenOperation.java:190)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:211)
at org.eclipse.ltk.ui.refactoring.RefactoringWizardOpenOperation.run(RefactoringWizardOpenOperation.java:126)
at org.eclipse.jdt.internal.ui.refactoring.actions.RefactoringStarter.activate(RefactoringStarter.java:41)
at org.eclipse.jdt.internal.corext.refactoring.RefactoringExecutionStarter.startInlineMethodRefactoring(RefactoringExecutionStarter.java:360)
at org.eclipse.jdt.internal.ui.refactoring.actions.InlineMethodAction.tryInlineMethod(InlineMethodAction.java:136)
at org.eclipse.jdt.ui.actions.InlineAction.run(InlineAction.java:127)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:278)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:252)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:474)
at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:124)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:98)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:305)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:237)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:174)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:165)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:484)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:204)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.handleCommandExecution(KeyBindingDispatcher.java:331)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:322)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:588)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:669)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:458)
at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:104)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:91)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1339)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1216)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1241)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1226)
at org.eclipse.swt.widgets.Control.traverse(Control.java:4444)
at org.eclipse.swt.widgets.Control.translateMnemonic(Control.java:4294)
at org.eclipse.swt.widgets.Composite.translateMnemonic(Composite.java:1249)
at org.eclipse.swt.widgets.Control.translateMnemonic(Control.java:4312)
at org.eclipse.swt.widgets.Display.translateMnemonic(Display.java:5031)
at org.eclipse.swt.widgets.Display.filterMessage(Display.java:1357)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3745)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1051)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:684)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:583)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:173)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:191)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:219)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:615)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:563)
at org.eclipse.equinox.launcher.Main.run(Main.java:1415)
Caused by: org.eclipse.core.runtime.AssertionFailedException: null argument:
at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:93)
at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:80)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.HierarchyType.initialize(HierarchyType.java:35)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createStandardType(TypeEnvironment.java:377)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:219)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createExtendsWildCardType(TypeEnvironment.java:433)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:206)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.ParameterizedType.initialize(ParameterizedType.java:41)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createParameterizedType(TypeEnvironment.java:405)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:199)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.HierarchyType.initialize(HierarchyType.java:45)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.ParameterizedType.initialize(ParameterizedType.java:35)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createParameterizedType(TypeEnvironment.java:405)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:199)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.HierarchyType.initialize(HierarchyType.java:45)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.ParameterizedType.initialize(ParameterizedType.java:35)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createParameterizedType(TypeEnvironment.java:405)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:199)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.ParameterizedType.initialize(ParameterizedType.java:41)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createParameterizedType(TypeEnvironment.java:405)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:199)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.HierarchyType.initialize(HierarchyType.java:45)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.ParameterizedType.initialize(ParameterizedType.java:35)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createParameterizedType(TypeEnvironment.java:405)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:199)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.HierarchyType.initialize(HierarchyType.java:45)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.ParameterizedType.initialize(ParameterizedType.java:35)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createParameterizedType(TypeEnvironment.java:405)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:199)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.HierarchyType.initialize(HierarchyType.java:45)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.ParameterizedType.initialize(ParameterizedType.java:35)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.createParameterizedType(TypeEnvironment.java:405)
at org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types.TypeEnvironment.create(TypeEnvironment.java:199)
at org.eclipse.jdt.internal.corext.dom.TypeRules.canAssign(TypeRules.java:43)
at org.eclipse.jdt.internal.corext.dom.ASTNodes.getExplicitCast(ASTNodes.java:1761)
at org.eclipse.jdt.internal.corext.refactoring.code.SourceProvider.replaceParameterWithExpression(SourceProvider.java:493)
at org.eclipse.jdt.internal.corext.refactoring.code.SourceProvider.getCodeBlocks(SourceProvider.java:401)
at org.eclipse.jdt.internal.corext.refactoring.code.CallInliner.perform(CallInliner.java:505)
at org.eclipse.jdt.internal.corext.refactoring.code.InlineMethodRefactoring.checkFinalConditions(InlineMethodRefactoring.java:316)
at org.eclipse.ltk.core.refactoring.CheckConditionsOperation.run(CheckConditionsOperation.java:87)
at org.eclipse.ltk.core.refactoring.CreateChangeOperation.run(CreateChangeOperation.java:116)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2505)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2533)
at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:90)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:123)
```
eclipse.buildId=4.40.0.I20260420-1800
java.version=25

Start by reproducing the Inline Method preview failure in Eclipse using the supplied classes A and B, noting that the report says the isolated snippet does not currently reproduce it. Trace the exception from InlineMethodAction through TypeRules and TypeEnvironment, especially HierarchyType.initialize, where the null assertion occurs. Done means the preview no longer throws this exception and the failure has regression coverage.

Written by the indexing model from the issue text.