Tables, Error Handling: Recovery from invalid index in TableSetColumnIndex(). (#1651)

docs/CHANGELOG.txt

@@ -66,6 +66,7 @@ Other changes:
   overridden when hot-reloading .ini state. (#7934)
 - Tables: tamed some .ini settings optimizations to more accurately allow
   overwriting/hot-reloading settings in more situations. (#7934)
+- Tables, Error Handling: Recovery from invalid index in TableSetColumnIndex(). (#1651)
 - Styles, Tabs: made the Close Button of selected tabs always visible by default,
   without requiring to hover the tab. (#8387)
   - Added style.TabCloseButtonMinWidthSelected/TabCloseButtonMinWidthUnselected settings

imgui_tables.cpp

@@ -2106,7 +2106,11 @@ bool ImGui::TableSetColumnIndex(int column_n)
     {
         if (table->CurrentColumn != -1)
             TableEndCell(table);
-        IM_ASSERT(column_n >= 0 && table->ColumnsCount);
+        if ((column_n >= 0 && column_n < table->ColumnsCount) == false)
+        {
+            IM_ASSERT_USER_ERROR(column_n >= 0 && column_n < table->ColumnsCount, "TableSetColumnIndex() invalid column index!");
+            return false;
+        }
         TableBeginCell(table, column_n);
     }