Re: Need help for bug 158451

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hi Regina,

On 14/12/2023 01:26, Regina Henschel wrote:
Hi all,

I can now narrow down the error somewhat.

Look at method SwTextFrame::FormatImpl() in
https://opengrok.libreoffice.org/xref/core/sw/source/core/text/frmform.cxx?r=7d7ca347#1832
It creates
    SwTextFormatInfo aInf( pRenderContext, this );
Later down in the for-loop, aInf is used. The for-loop iterates over
    pObj = aInf.GetTextFly().GetAnchoredObjList()
and performs
    aInf.GetTextFly().AnchoredObjToRect(pObj, aRect)
AnchoredObjToRect crashes then because of an invalid pObj.

You see the AnchoredObjList with these steps:
aInf > SwTextPaintInfo > m_aTextFly > mpAnchoredObjList

When aInf is created, mpAnchoredObjList is empty.
After line #1863
     Format_( aLine, aInf );
you can see the invalid item in that list.

This happens not always. When you use the example file of the bug report, first the text of the shape inside the group is handled. That works. Then the line where the group is anchored is handled. And there it happens. If the inline anchored object is not a group but a simple shape with text, first the line is handled and then the text of the shape.

the problem is that the type of anchor of the inner shape changes during text formatting, which is not supposed to happen.

hope https://gerrit.libreoffice.org/c/core/+/161137 should fix the crash.




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