tdf#147006 sw_fieldmarkhide: fix crash when deleting fly with fieldmark

The problem is similar to commit eef10be20a4c5108c68b19ccdda263c5ca852386,
there is a fieldmark in a fly and this results in
UpdateFramesForRemoveDeleteRedline() re-creating fly frames that have
already been deleted in SwUndoFlyBase::DelFly(), and then the
SwFlyAtContentFrame::SwClientNotify() crashes on a null anchor position
in the SwFormat::ResetFormatAttr(RES_ANCHOR).

This time the passed rPam is empty, after removing the dummy characters
of the fieldmark; there isn't really anything to do in this case so
just return.

Change-Id: I475b8fcb0bcf94be58ff553454c261d75076303b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/129308
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
(cherry picked from commit bdf1d9b8151476531f2fbe06f66db260efcbc529)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/129266
Tested-by: Xisco Fauli <xiscofauli@libreoffice.org>
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

2 files changed, 59 insertions, 0 deletions

diff --git a/sw/qa/extras/uiwriter/data/tdf147006.rtf b/sw/qa/extras/uiwriter/data/tdf147006.rtf
new file mode 100644
index 000000000000..462c8dc4d52d
--- /dev/null
+++ b/sw/qa/extras/uiwriter/data/tdf147006.rtf
@@ -0,0 +1,24 @@
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+{\stylesheet{\s0\snext0\rtlch\af6\afs24\alang1081 \ltrch\lang1031\langfe2052\hich\af3\loch\widctlpar\hyphpar0\ltrpar\cf0\f3\fs24\lang1031\kerning1\dbch\af8\langfe2052 Normal;}
+{\s20\sbasedon0\snext20 Frame Contents;}
+}{\*\generator LibreOfficeDev/7.4.0.0.alpha0$Linux_X86_64 LibreOffice_project/086efd30b2f5857d2b155099ec06c522d57ad81f}{\info{\creatim\yr2022\mo2\dy1\hr21\min9}{\revtim\yr2022\mo2\dy1\hr21\min10}{\printim\yr0\mo0\dy0\hr0\min0}}{\*\userprops}\deftab709
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diff --git a/sw/qa/extras/uiwriter/uiwriter2.cxx b/sw/qa/extras/uiwriter/uiwriter2.cxx
index 65142dbd64e1..988225938a89 100644
--- a/sw/qa/extras/uiwriter/uiwriter2.cxx
+++ b/sw/qa/extras/uiwriter/uiwriter2.cxx
@@ -3678,6 +3678,41 @@ CPPUNIT_TEST_FIXTURE(SwUiWriterTest2, testMixedFormFieldInsertion)
     CPPUNIT_ASSERT_EQUAL(sal_Int32(3), pMarkAccess->getAllMarksCount());
 }
 
+CPPUNIT_TEST_FIXTURE(SwUiWriterTest2, testTdf147006)
+{
+    SwDoc* const pDoc = createSwDoc(DATA_DIRECTORY, "tdf147006.rtf");
+
+    IDocumentMarkAccess& rIDMA(*pDoc->getIDocumentMarkAccess());
+    CPPUNIT_ASSERT_EQUAL(size_t(1), pDoc->GetFlyCount(FLYCNTTYPE_FRM));
+    CPPUNIT_ASSERT_EQUAL(size_t(1), pDoc->GetFlyCount(FLYCNTTYPE_GRF));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), rIDMA.getAllMarksCount());
+    CPPUNIT_ASSERT_EQUAL(std::iterator_traits<IDocumentMarkAccess::iterator>::difference_type(1),
+                         std::distance(rIDMA.getFieldmarksBegin(), rIDMA.getFieldmarksEnd()));
+
+    dispatchCommand(mxComponent, ".uno:SelectAll", {});
+    // this crashed
+    dispatchCommand(mxComponent, ".uno:Delete", {});
+    CPPUNIT_ASSERT_EQUAL(size_t(0), pDoc->GetFlyCount(FLYCNTTYPE_FRM));
+    CPPUNIT_ASSERT_EQUAL(size_t(0), pDoc->GetFlyCount(FLYCNTTYPE_GRF));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(0), rIDMA.getAllMarksCount());
+    dispatchCommand(mxComponent, ".uno:Undo", {});
+    CPPUNIT_ASSERT_EQUAL(size_t(1), pDoc->GetFlyCount(FLYCNTTYPE_FRM));
+    CPPUNIT_ASSERT_EQUAL(size_t(1), pDoc->GetFlyCount(FLYCNTTYPE_GRF));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), rIDMA.getAllMarksCount());
+    dispatchCommand(mxComponent, ".uno:Redo", {});
+    CPPUNIT_ASSERT_EQUAL(size_t(0), pDoc->GetFlyCount(FLYCNTTYPE_FRM));
+    CPPUNIT_ASSERT_EQUAL(size_t(0), pDoc->GetFlyCount(FLYCNTTYPE_GRF));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(0), rIDMA.getAllMarksCount());
+    dispatchCommand(mxComponent, ".uno:Undo", {});
+    CPPUNIT_ASSERT_EQUAL(size_t(1), pDoc->GetFlyCount(FLYCNTTYPE_FRM));
+    CPPUNIT_ASSERT_EQUAL(size_t(1), pDoc->GetFlyCount(FLYCNTTYPE_GRF));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(1), rIDMA.getAllMarksCount());
+    dispatchCommand(mxComponent, ".uno:Redo", {});
+    CPPUNIT_ASSERT_EQUAL(size_t(0), pDoc->GetFlyCount(FLYCNTTYPE_FRM));
+    CPPUNIT_ASSERT_EQUAL(size_t(0), pDoc->GetFlyCount(FLYCNTTYPE_GRF));
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(0), rIDMA.getAllMarksCount());
+}
+
 CPPUNIT_TEST_FIXTURE(SwUiWriterTest2, testTdf124261)
 {
 #if !defined(_WIN32)