Minor change for better safety

Signed-off-by: Jaehyun Kim <[email protected]>

Author: jhkim-pii

src/odb/src/db/dbBTerm.cpp

@@ -907,6 +907,9 @@ void _dbBTerm::disconnectModNet(_dbBTerm* bterm, _dbBlock* block)
         prev->_next_modnet_bterm = bterm->_next_modnet_bterm;
       }
     }
+
+    _next_modnet_bterm = 0;
+    _prev_modnet_bterm = 0;
     _mnet = 0;
   }
 }

src/odb/src/db/dbITerm.cpp

@@ -694,6 +694,9 @@ void dbITerm::disconnectDbModNet()
         prev->_next_modnet_iterm = iterm->_next_modnet_iterm;
       }
     }
+
+    iterm->_next_modnet_iterm = 0;
+    iterm->_prev_modnet_iterm = 0;
     iterm->_mnet = 0;
   }
 }

src/odb/src/db/dbModITerm.cpp

@@ -361,7 +361,6 @@ void dbModITerm::disconnect()
     _block->_journal->endAction();
   }
 
-  _moditerm->_mod_net = 0;
   _dbModITerm* next_moditerm
       = (_moditerm->_next_net_moditerm != 0)
             ? _block->_moditerm_tbl->getPtr(_moditerm->_next_net_moditerm)
@@ -378,6 +377,9 @@ void dbModITerm::disconnect()
   if (next_moditerm) {
     next_moditerm->_prev_net_moditerm = _moditerm->_prev_net_moditerm;
   }
+
+  _moditerm->_next_net_moditerm = 0;
+  _moditerm->_prev_net_moditerm = 0;
   _moditerm->_mod_net = 0;
 
   for (auto callback : _block->_callbacks) {