Description:
Per docs, XTextRangeCompare.compareRegionEnds(xR1, xR2) throws com::sun::star::lang::IllegalArgumentException	if either xR1 or xR2 is not within this text.

This is true in 24.8, but no longer true in 25.2. Zotero extension behaviour depends on this function throwing.


Steps to Reproduce:
Option Explicit

Sub InsertFootnoteAndCompare()
    Dim doc As Object, bodyText As Object, viewCurs As Object, bodyCurs As Object
    doc = ThisComponent
    bodyText = doc.Text
    viewCurs = doc.CurrentController.getViewCursor()

    ' 1) Insert a footnote at the current cursor
    Dim footnote As Object
    footnote = doc.createInstance("com.sun.star.text.Footnote")
    bodyText.insertTextContent(viewCurs, footnote, False)

    ' 2) Put some sample text into the footnote
    '    Footnote service exports XText, so we can get its text and write into it.
    Dim fText As Object, fCur As Object
    fText = footnote.getText()                 ' the text container inside the footnote
    fCur = fText.createTextCursor()
    fText.insertString(fCur, "This is the footnote text. Alpha beta gamma delta.", False)

    ' 3) Build a body range: from start of paragraph to current caret
    bodyCurs = bodyText.createTextCursorByRange(viewCurs)
    bodyCurs.gotoStartOfParagraph(False)
    bodyCurs.gotoRange(viewCurs, True)         ' select from start-of-paragraph to caret
    Dim bodyRange As Object
    bodyRange = bodyCurs

    ' 4) Compare two ranges in different Text objects
    Dim result As Integer
    result = fText.compareRegionStarts(bodyRange, fCur)
    MsgBox "Result " & result
End Sub

Actual Results:
A message box is shown with result

Expected Results:
An error is thrown


Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 25.2.5.2 (X86_64) / LibreOffice Community
Build ID: 03d19516eb2e1dd5d4ccd751a0d6f35f35e08022
CPU threads: 16; OS: Linux 6.8; UI render: default; VCL: gtk3
Locale: lt-LT (en_US.UTF-8); UI: en-US
Calc: threaded