BUG FIX: eeschema as segfaulting on the 'Insert' key because the m_itemToRepeat

was simply a pointer to an object on the display list.  At times this object
would disappear from the display list, in the test case because of a concatonation
of two wires, and if you then tried to clone the non-existent object you'd get a 
crash.  This was not merely a bug, but a naive design choice. IMO.
Now the item to repeat is cloned, so will never also be on the display list.

common/drawpanel.cpp

@@ -145,9 +145,11 @@ EDA_DRAW_PANEL::~EDA_DRAW_PANEL()
     wxGetApp().GetSettings()->Write( ENBL_AUTO_PAN_KEY, m_enableAutoPan );
 }
 
+
 EDA_DRAW_FRAME* EDA_DRAW_PANEL::GetParent()
 {
-    return ( EDA_DRAW_FRAME* ) wxWindow::GetParent();
+    wxWindow* mom = wxScrolledWindow::GetParent();
+    return (EDA_DRAW_FRAME*) mom;
 }
 
 

eeschema/bus-wire-junction.cpp

@@ -162,7 +162,7 @@ void SCH_EDIT_FRAME::BeginSegment( wxDC* DC, int type )
         }
 
         m_canvas->SetMouseCapture( DrawSegment, AbortCreateNewLine );
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
     }
     else    // A segment is in progress: terminates the current segment and add a new segment.
     {
@@ -239,7 +239,8 @@ void SCH_EDIT_FRAME::EndSegment( wxDC* DC )
         return;
 
     // Get the last non-null wire (this is the last created segment).
-    m_itemToRepeat = segment = (SCH_LINE*) s_wires.GetLast();
+    SetRepeatItem( segment = (SCH_LINE*) s_wires.GetLast() );
+
     screen->SetCurItem( NULL );
     m_canvas->EndMouseCapture( -1, -1, wxEmptyString, false );
 
@@ -341,7 +342,7 @@ void SCH_EDIT_FRAME::DeleteCurrentSegment( wxDC* DC )
 {
     SCH_SCREEN* screen = GetScreen();
 
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
 
     if( ( screen->GetCurItem() == NULL ) || !screen->GetCurItem()->IsNew() )
         return;
@@ -359,7 +360,7 @@ SCH_JUNCTION* SCH_EDIT_FRAME::AddJunction( wxDC* aDC, const wxPoint& aPosition,
 {
     SCH_JUNCTION* junction = new SCH_JUNCTION( aPosition );
 
-    m_itemToRepeat = junction;
+    SetRepeatItem( junction );
 
     m_canvas->CrossHairOff( aDC );     // Erase schematic cursor
     junction->Draw( m_canvas, aDC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
@@ -378,19 +379,19 @@ SCH_JUNCTION* SCH_EDIT_FRAME::AddJunction( wxDC* aDC, const wxPoint& aPosition,
 
 SCH_NO_CONNECT* SCH_EDIT_FRAME::AddNoConnect( wxDC* aDC, const wxPoint& aPosition )
 {
-    SCH_NO_CONNECT* NewNoConnect;
+    SCH_NO_CONNECT* no_connect = new SCH_NO_CONNECT( aPosition );
 
-    NewNoConnect   = new SCH_NO_CONNECT( aPosition );
+    SetRepeatItem( no_connect );
-    m_itemToRepeat = NewNoConnect;
 
     m_canvas->CrossHairOff( aDC );     // Erase schematic cursor
-    NewNoConnect->Draw( m_canvas, aDC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
+    no_connect->Draw( m_canvas, aDC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
+
     m_canvas->CrossHairOn( aDC );      // Display schematic cursor
 
-    GetScreen()->Append( NewNoConnect );
+    GetScreen()->Append( no_connect );
     OnModify();
-    SaveCopyInUndoList( NewNoConnect, UR_NEW );
+    SaveCopyInUndoList( no_connect, UR_NEW );
-    return NewNoConnect;
+    return no_connect;
 }
 
 
@@ -420,35 +421,46 @@ static void AbortCreateNewLine( EDA_DRAW_PANEL* Panel, wxDC* DC )
 
 void SCH_EDIT_FRAME::RepeatDrawItem( wxDC* DC )
 {
-    if( m_itemToRepeat == NULL )
+    SCH_ITEM*   repeater = GetRepeatItem();
+
+    if( !repeater )
         return;
 
-    m_itemToRepeat = (SCH_ITEM*) m_itemToRepeat->Clone();
+    //D( repeater>Show( 0, std::cout ); )
 
-    if( m_itemToRepeat->Type() == SCH_COMPONENT_T ) // If repeat component then put in move mode
+    // clone the repeater, move it, insert into display list, then save a copy
+    // via SetRepeatItem();
+
+    SCH_ITEM* my_clone = (SCH_ITEM*) repeater->Clone();
+
+    // If cloning a component then put into 'move' mode.
+    /* please tell me where components are snapshotted via SetRepeatItem()
+    if( my_clone->Type() == SCH_COMPONENT_T )
     {
         wxPoint pos = GetCrossHairPosition() -
-                      ( (SCH_COMPONENT*) m_itemToRepeat )->GetPosition();
+                      ( (SCH_COMPONENT*) my_clone )->GetPosition();
 
-        m_itemToRepeat->SetFlags( IS_NEW );
+        my_clone->SetFlags( IS_NEW );
-        ( (SCH_COMPONENT*) m_itemToRepeat )->SetTimeStamp( GetNewTimeStamp() );
+        ( (SCH_COMPONENT*) my_clone )->SetTimeStamp( GetNewTimeStamp() );
-        m_itemToRepeat->Move( pos );
+        my_clone->Move( pos );
-        m_itemToRepeat->Draw( m_canvas, DC, wxPoint( 0, 0 ), g_XorMode );
+        my_clone->Draw( m_canvas, DC, wxPoint( 0, 0 ), g_XorMode );
-        MoveItem( m_itemToRepeat, DC );
+        MoveItem( my_clone, DC );
-        return;
     }
-
+    else
-    m_itemToRepeat->Move( wxPoint( g_RepeatStep.GetWidth(), g_RepeatStep.GetHeight() ) );
+    */
-
-    if( m_itemToRepeat->CanIncrementLabel() )
-        ( (SCH_TEXT*) m_itemToRepeat )->IncrementLabel();
-
-    if( m_itemToRepeat )
     {
-        GetScreen()->Append( m_itemToRepeat );
+        my_clone->Move( wxPoint( g_RepeatStep.GetWidth(), g_RepeatStep.GetHeight() ) );
+
+        if( my_clone->CanIncrementLabel() )
+            ( (SCH_TEXT*) my_clone )->IncrementLabel();
+
+        GetScreen()->Append( my_clone );
         GetScreen()->TestDanglingEnds();
-        m_itemToRepeat->Draw( m_canvas, DC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
+        my_clone->Draw( m_canvas, DC, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
-        SaveCopyInUndoList( m_itemToRepeat, UR_NEW );
+        SaveCopyInUndoList( my_clone, UR_NEW );
-        m_itemToRepeat->ClearFlags();
+        my_clone->ClearFlags();
     }
+
+    // clone my_clone, now that it has been moved, thus saving new position.
+    SetRepeatItem( my_clone );
 }

eeschema/edit_bitmap.cpp

@@ -144,7 +144,7 @@ void SCH_EDIT_FRAME::MoveImage( SCH_BITMAP* aImageItem, wxDC* aDC )
 
     m_canvas->SetMouseCapture( moveBitmap, abortMoveBitmap );
     GetScreen()->SetCurItem( aImageItem );
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
 
     SetUndoItem( aImageItem );
 

eeschema/edit_label.cpp

@@ -72,7 +72,7 @@ SCH_TEXT* SCH_EDIT_FRAME::CreateNewText( wxDC* aDC, int aType )
 {
     SCH_TEXT* textItem = NULL;
 
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
 
     switch( aType )
     {
@@ -235,7 +235,7 @@ void SCH_EDIT_FRAME::OnConvertTextType( wxCommandEvent& aEvent )
         }
     }
 
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
     OnModify();
     newtext->Draw( m_canvas, &dc, wxPoint( 0, 0 ), GR_DEFAULT_DRAWMODE );
     m_canvas->CrossHairOn( &dc );    // redraw schematic cursor

eeschema/getpart.cpp

@@ -199,7 +199,7 @@ SCH_COMPONENT* SCH_EDIT_FRAME::Load_Component( wxDC*           aDC,
 {
     int unit    = 1;
     int convert = 1;
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
     m_canvas->SetIgnoreMouseEvents( true );
 
     wxString Name = SelectComponentFromLibrary( aLibname, aHistoryList, aUseLibBrowser,

eeschema/hierarch.cpp

@@ -268,7 +268,7 @@ void HIERARCHY_NAVIG_DLG::OnSelect( wxTreeEvent& event )
 
 void SCH_EDIT_FRAME::DisplayCurrentSheet()
 {
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
     ClearMsgPanel();
 
     SCH_SCREEN* screen = m_CurrentSheet->LastScreen();

eeschema/hotkeys.cpp

@@ -385,7 +385,7 @@ void SCH_EDIT_FRAME::OnHotKey( wxDC* aDC, int aHotKey, const wxPoint& aPosition,
         break;
 
     case HK_REPEAT_LAST:
-        if( notBusy && m_itemToRepeat && ( m_itemToRepeat->GetFlags() == 0 ) )
+        if( notBusy && GetRepeatItem() && ( GetRepeatItem()->GetFlags() == 0 ) )
             RepeatDrawItem( aDC );
         break;
 

eeschema/onleftclick.cpp

@@ -58,7 +58,7 @@ void SCH_EDIT_FRAME::OnLeftClick( wxDC* aDC, const wxPoint& aPosition )
     if( ( GetToolId() == ID_NO_TOOL_SELECTED ) || ( item && item->GetFlags() ) )
     {
         m_canvas->SetAutoPanRequest( false );
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
 
         if( item && item->GetFlags() )
         {
@@ -128,8 +128,9 @@ void SCH_EDIT_FRAME::OnLeftClick( wxDC* aDC, const wxPoint& aPosition )
         {
             if( false == GetScreen()->GetItem( gridPosition, 0, SCH_NO_CONNECT_T ) )
             {
-                m_itemToRepeat = AddNoConnect( aDC, gridPosition );
+                SCH_NO_CONNECT*  no_connect = AddNoConnect( aDC, gridPosition );
-                GetScreen()->SetCurItem( m_itemToRepeat );
+                SetRepeatItem( no_connect );
+                GetScreen()->SetCurItem( no_connect );
                 m_canvas->SetAutoPanRequest( true );
             }
         }
@@ -137,7 +138,6 @@ void SCH_EDIT_FRAME::OnLeftClick( wxDC* aDC, const wxPoint& aPosition )
         {
             addCurrentItemToList( aDC );
         }
-
         break;
 
     case ID_JUNCTION_BUTT:
@@ -145,8 +145,9 @@ void SCH_EDIT_FRAME::OnLeftClick( wxDC* aDC, const wxPoint& aPosition )
         {
             if( false == GetScreen()->GetItem( gridPosition, 0, SCH_JUNCTION_T ) )
             {
-                m_itemToRepeat = AddJunction( aDC, gridPosition, true );
+                SCH_JUNCTION* junction = AddJunction( aDC, gridPosition, true );
-                GetScreen()->SetCurItem( m_itemToRepeat );
+                SetRepeatItem( junction );
+                GetScreen()->SetCurItem( junction );
                 m_canvas->SetAutoPanRequest( true );
             }
         }
@@ -154,7 +155,6 @@ void SCH_EDIT_FRAME::OnLeftClick( wxDC* aDC, const wxPoint& aPosition )
         {
             addCurrentItemToList( aDC );
         }
-
         break;
 
     case ID_WIRETOBUS_ENTRY_BUTT:
@@ -168,6 +168,7 @@ void SCH_EDIT_FRAME::OnLeftClick( wxDC* aDC, const wxPoint& aPosition )
             addCurrentItemToList( aDC );
         }
         break;
+
     case ID_BUSTOBUS_ENTRY_BUTT:
         if( ( item == NULL ) || ( item->GetFlags() == 0 ) )
         {

eeschema/schedit.cpp

@@ -119,7 +119,7 @@ void SCH_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
     {
     case ID_HIERARCHY:
         InstallHierarchyFrame( &dc, pos );
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
         break;
 
     case wxID_CUT:
@@ -127,7 +127,7 @@ void SCH_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
             break;
 
         HandleBlockEndByPopUp( BLOCK_DELETE, &dc );
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
         SetSheetNumberAndCount();
         break;
 
@@ -182,7 +182,7 @@ void SCH_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
         m_canvas->MoveCursorToCrossHair();
         DeleteConnection( id == ID_POPUP_SCH_DELETE_CONNECTION );
         screen->SetCurItem( NULL );
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
         screen->TestDanglingEnds( m_canvas, &dc );
         m_canvas->Refresh();
         break;
@@ -222,7 +222,7 @@ void SCH_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
 
         DeleteItem( item );
         screen->SetCurItem( NULL );
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
         screen->TestDanglingEnds( m_canvas, &dc );
         SetSheetNumberAndCount();
         OnModify();
@@ -375,7 +375,7 @@ void SCH_EDIT_FRAME::Process_Special_Functions( wxCommandEvent& event )
     // End switch ( id )    (Command execution)
 
     if( GetToolId() == ID_NO_TOOL_SELECTED )
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
 }
 
 
@@ -445,7 +445,7 @@ void SCH_EDIT_FRAME::OnMoveItem( wxCommandEvent& aEvent )
     }
 
     if( GetToolId() == ID_NO_TOOL_SELECTED )
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
 }
 
 
@@ -561,7 +561,7 @@ void SCH_EDIT_FRAME::OnSelectTool( wxCommandEvent& aEvent )
         break;
 
     default:
-        m_itemToRepeat = NULL;
+        SetRepeatItem( NULL );
     }
 
     // Simulate left click event if we got here from a hot key.
@@ -695,7 +695,7 @@ void SCH_EDIT_FRAME::MoveItem( SCH_ITEM* aItem, wxDC* aDC )
 {
     wxCHECK_RET( aItem != NULL, wxT( "Cannot move invalid schematic item" ) );
 
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
 
     if( !aItem->IsNew() )
     {

eeschema/schframe.cpp

@@ -177,7 +177,8 @@ SCH_EDIT_FRAME::SCH_EDIT_FRAME( wxWindow* aParent, const wxString& aTitle,
                     const wxPoint& aPosition, const wxSize& aSize,
                     long aStyle ) :
     SCH_BASE_FRAME( aParent, SCHEMATIC_FRAME_TYPE, aTitle, aPosition, aSize,
-                    aStyle, SCH_EDIT_FRAME_NAME )
+                    aStyle, SCH_EDIT_FRAME_NAME ),
+    m_item_to_repeat( 0 )
 {
     m_FrameName = SCH_EDIT_FRAME_NAME;
     m_showAxis = false;                 // true to show axis
@@ -207,8 +208,6 @@ SCH_EDIT_FRAME::SCH_EDIT_FRAME( wxWindow* aParent, const wxString& aTitle,
     icon.CopyFromBitmap( KiBitmap( icon_eeschema_xpm ) );
     SetIcon( icon );
 
-    m_itemToRepeat = NULL;
-
     /* Get config */
     LoadSettings();
 
@@ -268,6 +267,8 @@ SCH_EDIT_FRAME::SCH_EDIT_FRAME( wxWindow* aParent, const wxString& aTitle,
 
 SCH_EDIT_FRAME::~SCH_EDIT_FRAME()
 {
+    delete m_item_to_repeat;        // we own the cloned object, see this->SetRepeatItem()
+
     SetScreen( NULL );
     delete m_CurrentSheet;          // a SCH_SHEET_PATH, on the heap.
     delete m_undoItem;
@@ -281,6 +282,27 @@ SCH_EDIT_FRAME::~SCH_EDIT_FRAME()
 }
 
 
+void SCH_EDIT_FRAME::SetRepeatItem( SCH_ITEM* aItem )
+{
+    // we cannot store a pointer to an item in the display list here since
+    // that item may be deleted, such as part of a line concatonation or other.
+    // So simply always keep a copy of the object which is to be repeated.
+
+    SCH_ITEM*   old = m_item_to_repeat;
+    SCH_ITEM*   cur = aItem;
+
+    if( cur != old )
+    {
+        if( cur )
+            aItem = (SCH_ITEM*) cur->Clone();
+
+        m_item_to_repeat = aItem;
+
+        delete old;
+    }
+}
+
+
 void SCH_EDIT_FRAME::SetSheetNumberAndCount()
 {
     SCH_SCREEN* screen = GetScreen();

eeschema/sheet.cpp

@@ -45,7 +45,7 @@ bool SCH_EDIT_FRAME::EditSheet( SCH_SHEET* aSheet, wxDC* aDC )
     if( aSheet == NULL )
         return false;
 
-    /* Get the new texts */
+    // Get the new texts
     DIALOG_SCH_SHEET_PROPS dlg( this );
 
     wxString units = GetUnitsLabel( g_UserUnit );
@@ -277,11 +277,12 @@ static void MoveOrResizeSheet( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint&
 }
 
 
-/*  Complete sheet move.  */
+//  Complete sheet move.
 static void ExitSheet( EDA_DRAW_PANEL* aPanel, wxDC* aDC )
 {
     SCH_SCREEN* screen = (SCH_SCREEN*) aPanel->GetScreen();
     SCH_ITEM*   item = screen->GetCurItem();
+
     SCH_EDIT_FRAME* parent = ( SCH_EDIT_FRAME* ) aPanel->GetParent();
 
     if( (item == NULL) || (item->Type() != SCH_SHEET_T) || (parent == NULL) )
@@ -320,10 +321,10 @@ static void ExitSheet( EDA_DRAW_PANEL* aPanel, wxDC* aDC )
 }
 
 
-/* Create hierarchy sheet.  */
+// Create hierarchy sheet.
 SCH_SHEET* SCH_EDIT_FRAME::CreateSheet( wxDC* aDC )
 {
-    m_itemToRepeat = NULL;
+    SetRepeatItem( NULL );
 
     SCH_SHEET* sheet = new SCH_SHEET( GetCrossHairPosition() );
 

include/class_drawpanel.h

@@ -123,7 +123,7 @@ public:
 
     BASE_SCREEN* GetScreen();
 
-    virtual EDA_DRAW_FRAME* GetParent();
+    EDA_DRAW_FRAME* GetParent();
 
     void OnPaint( wxPaintEvent& event );
 

include/wxEeschemaStruct.h

@@ -134,7 +134,7 @@ private:
     wxArrayString           m_findStringHistoryList;
     wxArrayString           m_replaceStringHistoryList;
     BLOCK_SELECTOR          m_blockItems;         ///< List of selected items.
-    SCH_ITEM*               m_itemToRepeat;       ///< Last item to insert by the repeat command.
+    SCH_ITEM*               m_item_to_repeat;     ///< Last item to insert by the repeat command.
     int                     m_repeatLabelDelta;   ///< Repeat label number increment step.
     SCH_COLLECTOR           m_collectedItems;     ///< List of collected items.
     SCH_FIND_COLLECTOR      m_foundItems;         ///< List of find/replace items.
@@ -902,7 +902,8 @@ private:
     void        InstallHierarchyFrame( wxDC* DC, wxPoint& pos );
     SCH_SHEET*  CreateSheet( wxDC* DC );
     void        ReSizeSheet( SCH_SHEET* Sheet, wxDC* DC );
-    // Loads the cache library associated to the aFileName
+
+    /// Loads the cache library associated to the aFileName
     bool        LoadCacheLibrary( const wxString& aFileName );
 
 public:
@@ -1176,7 +1177,18 @@ public:
      */
     void RepeatDrawItem( wxDC* DC );
 
-    void SetRepeatItem( SCH_ITEM* aItem ) { m_itemToRepeat = aItem; }
+    /**
+     * Function SetRepeatItem
+     * clones aItem and owns that clone in this container.
+     */
+    void SetRepeatItem( SCH_ITEM* aItem );
+
+    /**
+     * Function GetRepeatItem
+     * returns the item which is to be repeated with the insert key.  Such object
+     * is owned by this container, and must be cloned.
+     */
+    SCH_ITEM* GetRepeatItem() const             { return m_item_to_repeat; }
 
     /**
      * Function SetUndoItem