Fix bugs 1264236, 1264238, 1264254

common/drawframe.cpp

@@ -636,7 +636,7 @@ void EDA_DRAW_FRAME::ClearMsgPanel( void )
 
 void EDA_DRAW_FRAME::SetMsgPanel( const MSG_PANEL_ITEMS& aList )
 {
-    if( m_messagePanel == NULL && !aList.empty() )
+    if( m_messagePanel == NULL )
         return;
 
     ClearMsgPanel();

gerbview/class_am_param.cpp

@@ -71,6 +71,7 @@ double AM_PARAM::GetValue( const D_CODE* aDcode ) const
     double paramvalue = 0.0;
     double curr_value = 0.0;
     parm_item_type state = POPVALUE;
+
     for( unsigned ii = 0; ii < m_paramStack.size(); ii++ )
     {
         AM_PARAM_ITEM item = m_paramStack[ii];
@@ -85,12 +86,19 @@ double AM_PARAM::GetValue( const D_CODE* aDcode ) const
 
             case PUSHPARM:
                 // get the parameter from the aDcode
-                if( aDcode && item.GetIndex() <= aDcode->GetParamCount() )
-                    curr_value = aDcode->GetParam( item.GetIndex() );
-                else    // Get parameter from local param definition
+                if( aDcode )    // should be always true here
+                {
+                    if( item.GetIndex() <= aDcode->GetParamCount() )
+                        curr_value = aDcode->GetParam( item.GetIndex() );
+                    else    // Get parameter from local param definition
+                    {
+                        const APERTURE_MACRO * am_parent = aDcode->GetMacro();
+                        curr_value = am_parent->GetLocalParam( aDcode, item.GetIndex() );
+                    }
+                }
+                else
                 {
-                    const APERTURE_MACRO * am_parent = aDcode->GetMacro();
-                    curr_value = am_parent->GetLocalParam( aDcode, item.GetIndex() );
+                    wxLogDebug( wxT( "AM_PARAM::GetValue(): NULL param aDcode\n" ) );
                 }
                 // Fall through
             case PUSHVALUE: // a value is on the stack:

pcbnew/class_track.cpp

@@ -1154,12 +1154,18 @@ void TRACK::GetMsgPanelInfoBase( std::vector< MSG_PANEL_ITEM >& aList )
         LAYER_NUM top_layer, bottom_layer;
 
         Via->ReturnLayerPair( &top_layer, &bottom_layer );
-        msg = board->GetLayerName( top_layer ) + wxT( "/" )
-            + board->GetLayerName( bottom_layer );
+        if( board )
+            msg = board->GetLayerName( top_layer ) + wxT( "/" )
+                + board->GetLayerName( bottom_layer );
+        else
+            msg.Printf(wxT("%d/%d"), top_layer, bottom_layer );
     }
     else
     {
-        msg = board->GetLayerName( m_Layer );
+        if( board )
+            msg = board->GetLayerName( m_Layer );
+        else
+            msg.Printf(wxT("%d"), m_Layer );
     }
 
     aList.push_back( MSG_PANEL_ITEM( _( "Layer" ), msg, BROWN ) );