3 files changed, 44 insertions, 11 deletions

diff --git a/sw/source/ui/fldui/flddb.cxx b/sw/source/ui/fldui/flddb.cxx
index f65abe0bdf7a..dd5e7046728d 100644
--- a/sw/source/ui/fldui/flddb.cxx
+++ b/sw/source/ui/fldui/flddb.cxx
@@ -303,12 +303,18 @@ void SwFieldDBPage::TypeHdl(const weld::TreeView* pBox)
         OUString sColumnName;
         if (nTypeId == SwFieldTypesEnum::Database)
         {
-            aData = static_cast<SwDBField*>(GetCurField())->GetDBData();
-            sColumnName = static_cast<SwDBFieldType*>(GetCurField()->GetTyp())->GetColumnName();
+            if (auto const*const pField = dynamic_cast<SwDBField*>(GetCurField()))
+            {
+                aData = pField->GetDBData();
+                sColumnName = static_cast<SwDBFieldType*>(GetCurField()->GetTyp())->GetColumnName();
+            }
         }
         else
         {
-            aData = static_cast<SwDBNameInfField*>(GetCurField())->GetDBData(pSh->GetDoc());
+            if (auto *const pField = dynamic_cast<SwDBNameInfField*>(GetCurField()))
+            {
+                aData = pField->GetDBData(pSh->GetDoc());
+            }
         }
         m_xDatabaseTLB->Select(aData.sDataSource, aData.sCommand, sColumnName);
     }
diff --git a/sw/source/ui/fldui/flddinf.cxx b/sw/source/ui/fldui/flddinf.cxx
index b35a12b77516..c9e07406ad5c 100644
--- a/sw/source/ui/fldui/flddinf.cxx
+++ b/sw/source/ui/fldui/flddinf.cxx
@@ -101,10 +101,13 @@ void SwFieldDokInfPage::Reset(const SfxItemSet* )
     if (IsFieldEdit())
     {
         const SwField* pCurField = GetCurField();
-        nSubType = static_cast<const SwDocInfoField*>(pCurField)->GetSubType() & 0xff;
+        nSubType = pCurField->GetSubType() & 0xff;
         if( nSubType == DI_CUSTOM )
         {
-            m_sOldCustomFieldName = static_cast<const SwDocInfoField*>(pCurField)->GetName();
+            if (auto const pField = dynamic_cast<SwDocInfoField const*>(pCurField))
+            {
+                m_sOldCustomFieldName = pField->GetName();
+            }
         }
         m_xFormatLB->SetAutomaticLanguage(pCurField->IsAutomaticLanguage());
         SwWrtShell *pSh = GetWrtShell();
@@ -313,12 +316,17 @@ IMPL_LINK_NOARG(SwFieldDokInfPage, SubTypeHdl, weld::TreeView&, void)
         bEnable = true;
     }
 
-    sal_uInt32 nFormat = IsFieldEdit() ? static_cast<SwDocInfoField*>(GetCurField())->GetFormat() : 0;
+    sal_uInt32 nFormat = 0;
 
-    sal_uInt16 nOldSubType = IsFieldEdit() ? (static_cast<SwDocInfoField*>(GetCurField())->GetSubType() & 0xff00) : 0;
+    sal_uInt16 nOldSubType = 0;
 
     if (IsFieldEdit())
     {
+        if (auto const pField = dynamic_cast<SwDocInfoField const*>(GetCurField()))
+        {
+            nFormat = pField->GetFormat();
+            nOldSubType = pField->GetSubType() & 0xff00;
+        }
         nPos = m_xSelectionLB->get_selected_index();
         if (nPos != -1)
         {
@@ -369,10 +377,14 @@ sal_Int32 SwFieldDokInfPage::FillSelectionLB(sal_uInt16 nSubType)
 
     sal_uInt16 nSize = 0;
     sal_Int32 nSelPos = -1;
-    sal_uInt16 nExtSubType = IsFieldEdit() ? (static_cast<SwDocInfoField*>(GetCurField())->GetSubType() & 0xff00) : 0;
+    sal_uInt16 nExtSubType = 0;
 
     if (IsFieldEdit())
     {
+        if (auto const pField = dynamic_cast<SwDocInfoField const*>(GetCurField()))
+        {
+            nExtSubType = pField->GetSubType() & 0xff00;
+        }
         m_xFixedCB->set_active((nExtSubType & DI_SUB_FIXED) != 0);
         nExtSubType = ((nExtSubType & ~DI_SUB_FIXED) >> 8) - 1;
     }
diff --git a/sw/source/ui/fldui/fldref.cxx b/sw/source/ui/fldui/fldref.cxx
index 0b18e0d41e89..910587943607 100644
--- a/sw/source/ui/fldui/fldref.cxx
+++ b/sw/source/ui/fldui/fldref.cxx
@@ -332,9 +332,15 @@ IMPL_LINK_NOARG(SwFieldRefPage, TypeHdl, weld::TreeView&, void)
                     break;
 
                 case REF_SEQUENCEFLD:
-                    sName = static_cast<SwGetRefField*>(GetCurField())->GetSetRefName();
+                {
+                    SwGetRefField const*const pRefField(dynamic_cast<SwGetRefField*>(GetCurField()));
+                    if (pRefField)
+                    {
+                        sName = pRefField->GetSetRefName();
+                    }
                     nFlag = REFFLDFLAG;
                     break;
+                }
             }
 
             if (m_xTypeLB->find_text(sName) == -1)   // reference to deleted mark
@@ -470,9 +476,14 @@ void SwFieldRefPage::UpdateSubType(const OUString& filterString)
     SwWrtShell *pSh = GetWrtShell();
     if(!pSh)
         pSh = ::GetActiveWrtShell();
-    SwGetRefField* pRefField = static_cast<SwGetRefField*>(GetCurField());
+    SwGetRefField const*const pRefField(dynamic_cast<SwGetRefField*>(GetCurField()));
     const sal_uInt16 nTypeId = m_xTypeLB->get_id(GetTypeSel()).toUInt32();
 
+    if (!pRefField)
+    {
+        return;
+    }
+
     OUString sOldSel;
     // #i83479#
     if ( m_xSelectionLB->get_visible() )
@@ -956,7 +967,11 @@ bool SwFieldRefPage::FillItemSet(SfxItemSet* )
         }
     }
 
-    SwGetRefField* pRefField = static_cast<SwGetRefField*>(GetCurField());
+    SwGetRefField const*const pRefField(dynamic_cast<SwGetRefField*>(GetCurField()));
+    if (!pRefField)
+    {
+        return false;
+    }
 
     if (REFFLDFLAG & nTypeId)
     {