Resolves: tdf#108654 check nTabNo against maTabData size

ScViewData::DeleteTab() and DeleteTabs() never did that and worked by accident
for which commit 73dec49802ef8fc42c5719efaa42a33cde68e569 removed the
grounding..

squash this into it too:

assert(nTab < static_cast<SCTAB>(maTabData.size())); cause of tdf#108796

Have a dev friendly abort instead of a deep throw in case of the unexpected.

Change-Id: I95460cd017d558c073df7891551d0251009dc1d4
Reviewed-on: https://gerrit.libreoffice.org/56261
Reviewed-by: Aron Budea <aron.budea@collabora.com>
Tested-by: Aron Budea <aron.budea@collabora.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/sc/source/ui/view/viewdata.cxx b/sc/source/ui/view/viewdata.cxx
index d2e5b461e9ed..b1b092d85fd3 100644
--- a/sc/source/ui/view/viewdata.cxx
+++ b/sc/source/ui/view/viewdata.cxx
@@ -903,9 +903,15 @@ void ScViewData::InsertTabs( SCTAB nTab, SCTAB nNewSheets )
 
 void ScViewData::DeleteTab( SCTAB nTab )
 {
+    assert(nTab < static_cast<SCTAB>(maTabData.size()));
     delete maTabData.at(nTab);
-
     maTabData.erase(maTabData.begin() + nTab);
+
+    if (static_cast<size_t>(nTabNo) >= maTabData.size())
+    {
+        EnsureTabDataSize(1);
+        nTabNo = maTabData.size() - 1;
+    }
     UpdateCurrentTab();
     mpMarkData->DeleteTab( nTab );
 }
@@ -919,6 +925,11 @@ void ScViewData::DeleteTabs( SCTAB nTab, SCTAB nSheets )
     }
 
     maTabData.erase(maTabData.begin() + nTab, maTabData.begin()+ nTab+nSheets);
+    if (static_cast<size_t>(nTabNo) >= maTabData.size())
+    {
+        EnsureTabDataSize(1);
+        nTabNo = maTabData.size() - 1;
+    }
     UpdateCurrentTab();
 }