Internal Error, Invalid stack frame (IllegalStateException) while debugging

Sometimes during debugging the Error log pops up with Exceptions like this. It is completely unclear to the user what went wrong, why and how to solve.


It would be good if that message could be improved to make clear if its a programming issue within JDT or not (i hope so). At best a Hover would fail much more silently if something is just out of sync (for example only warning with appropriate message)

```
eclipse.buildId=4.35.0.I20250129-0030
java.version=22.0.2
java.vendor=Eclipse Adoptium
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=de_DE
Command-line arguments: -os win32 -ws win32 -arch x86_64

This is a continuation of log file C:\Users\jkubitz\platform-2025-01-02\ws\.metadata\.bak_0.log
Created Time: 2025-01-29 07:51:01.381

org.eclipse.jdt.debug.ui
Error
Wed Jan 29 13:02:35 CET 2025
Internal Error

org.eclipse.debug.core.DebugException: Invalid stack frame
at org.eclipse.jdt.internal.debug.core.model.JDIStackFrame.getUnderlyingStackFrame(JDIStackFrame.java:1373)
at org.eclipse.jdt.internal.debug.core.model.JDIStackFrame.getUnderlyingThisObject(JDIStackFrame.java:1008)
at org.eclipse.jdt.internal.debug.core.model.JDIStackFrame.getVariables0(JDIStackFrame.java:366)
at org.eclipse.jdt.internal.debug.core.model.JDIStackFrame.getVariables(JDIStackFrame.java:304)
at org.eclipse.jdt.internal.debug.ui.JavaDebugHover.containsVariable(JavaDebugHover.java:620)
at org.eclipse.jdt.internal.debug.ui.JavaDebugHover.lambda$2(JavaDebugHover.java:639)
at org.eclipse.jdt.internal.debug.ui.JavaDebugHover.findFirstFrameForVariable(JavaDebugHover.java:604)
at org.eclipse.jdt.internal.debug.ui.JavaDebugHover.getHoverInfo2(JavaDebugHover.java:469)
at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo2(BestMatchHover.java:165)
at org.eclipse.jdt.internal.ui.text.java.hover.BestMatchHover.getHoverInfo2(BestMatchHover.java:131)
at org.eclipse.jdt.internal.ui.text.java.hover.JavaEditorTextHoverProxy.getHoverInfo2(JavaEditorTextHoverProxy.java:89)
at org.eclipse.jface.text.TextViewerHoverManager$1.run(TextViewerHoverManager.java:155)
Caused by: java.lang.IllegalStateException
at org.eclipse.jdt.internal.debug.core.model.JDIStackFrame.getUnderlyingStackFrame(JDIStackFrame.java:1376)
... 11 more

```