Coverity fixes

eeschema/connection_graph.cpp

@@ -1990,7 +1990,7 @@ bool CONNECTION_GRAPH::ercCheckBusToNetConflicts( const CONNECTION_SUBGRAPH* aSu
 
     SCH_ITEM* net_item = nullptr;
     SCH_ITEM* bus_item = nullptr;
-    SCH_CONNECTION conn;
+    SCH_CONNECTION conn( this );
 
     for( auto item : aSubgraph->m_items )
     {

eeschema/dialogs/dialog_migrate_buses.cpp

@@ -122,15 +122,17 @@ void DIALOG_MIGRATE_BUSES::updateUi()
 }
 
 
-std::vector<wxString> DIALOG_MIGRATE_BUSES::getProposedLabels( const std::vector<wxString>& aLabelList )
+std::vector<wxString> DIALOG_MIGRATE_BUSES::getProposedLabels(
+        const std::vector<wxString>& aLabelList )
 {
     int lowest_start = INT_MAX;
     int highest_end = -1;
     int widest_bus = -1;
 
+    SCH_CONNECTION conn( m_frame->Schematic().ConnectionGraph() );
+
     for( const wxString& label : aLabelList )
     {
-        SCH_CONNECTION conn;
         conn.ConfigureFromLabel( label );
 
         int start = conn.VectorStart();
@@ -146,7 +148,6 @@ std::vector<wxString> DIALOG_MIGRATE_BUSES::getProposedLabels( const std::vector
             widest_bus = end - start + 1;
     }
 
-    SCH_CONNECTION conn;
     std::vector<wxString> proposals;
 
     for( const wxString& label : aLabelList )

eeschema/project_rescue.cpp

@@ -503,7 +503,9 @@ RESCUER::RESCUER( PROJECT& aProject, SCHEMATIC* aSchematic, SCH_SHEET_PATH* aCur
 
     wxASSERT( m_schematic );
 
+    if( m_schematic )
         get_components( m_schematic, m_components );
+
     m_prj = &aProject;
     m_currentSheet = aCurrentSheet;
     m_galBackEndType = aGalBackEndType;

eeschema/sch_connection.cpp

@@ -60,7 +60,17 @@
 
 SCH_CONNECTION::SCH_CONNECTION( SCH_ITEM* aParent, SCH_SHEET_PATH aPath ) :
         m_sheet( aPath ),
-        m_parent( aParent )
+        m_parent( aParent ),
+        m_graph( nullptr )
+{
+    Reset();
+}
+
+
+SCH_CONNECTION::SCH_CONNECTION( CONNECTION_GRAPH* aGraph ) :
+        m_sheet( SCH_SHEET_PATH() ),
+        m_parent( nullptr ),
+        m_graph( aGraph )
 {
     Reset();
 }

eeschema/sch_connection.h

@@ -63,6 +63,8 @@ class SCH_CONNECTION
 public:
     SCH_CONNECTION( SCH_ITEM* aParent = nullptr, SCH_SHEET_PATH aPath = SCH_SHEET_PATH() );
 
+    SCH_CONNECTION( CONNECTION_GRAPH* aGraph );
+
     ~SCH_CONNECTION()
     {}
 

eeschema/sch_eagle_plugin.cpp

@@ -358,6 +358,7 @@ SCH_EAGLE_PLUGIN::SCH_EAGLE_PLUGIN()
     m_kiway        = nullptr;
     m_rootSheet    = nullptr;
     m_currentSheet = nullptr;
+    m_schematic    = nullptr;
 }
 
 

eeschema/sch_legacy_plugin.cpp

@@ -579,11 +579,12 @@ SCH_LEGACY_PLUGIN::~SCH_LEGACY_PLUGIN()
 void SCH_LEGACY_PLUGIN::init( KIWAY* aKiway, const PROPERTIES* aProperties )
 {
     m_version   = 0;
-    m_rootSheet = NULL;
+    m_rootSheet = nullptr;
     m_props     = aProperties;
     m_kiway     = aKiway;
-    m_cache = NULL;
-    m_out = NULL;
+    m_cache     = nullptr;
+    m_out       = nullptr;
+    m_schematic = nullptr;
 }
 
 
@@ -640,6 +641,7 @@ SCH_SHEET* SCH_LEGACY_PLUGIN::Load( const wxString& aFileName, KIWAY* aKiway, SC
 
         // If we got here, the schematic loaded successfully.
         sheet = newSheet.release();
+        m_rootSheet = nullptr;         // Quiet Coverity warning.
     }
     else
     {

eeschema/sch_screen.cpp

@@ -1294,7 +1294,12 @@ void SCH_SCREENS::ClearAnnotation()
 
 void SCH_SCREENS::ClearAnnotationOfNewSheetPaths( SCH_SHEET_LIST& aInitialSheetPathList )
 {
-    SCHEMATIC* sch = GetFirst()->Schematic();
+    SCH_SCREEN* first = GetFirst();
+
+    if( !first )
+        return;
+
+    SCHEMATIC* sch = first->Schematic();
 
     wxCHECK_RET( sch, "Null schematic in SCH_SCREENS::ClearAnnotationOfNewSheetPaths" );
 
@@ -1419,7 +1424,12 @@ void SCH_SCREENS::UpdateSymbolLinks( REPORTER* aReporter )
     for( SCH_SCREEN* screen = GetFirst(); screen; screen = GetNext() )
         screen->UpdateSymbolLinks( aReporter );
 
-    SCHEMATIC* sch = GetFirst()->Schematic();
+    SCH_SCREEN* first = GetFirst();
+
+    if( !first )
+        return;
+
+    SCHEMATIC* sch = first->Schematic();
 
     wxCHECK_RET( sch, "Null schematic in SCH_SCREENS::UpdateSymbolLinks" );
 
@@ -1571,7 +1581,12 @@ bool SCH_SCREENS::CanCauseCaseSensitivityIssue( const wxString& aSchematicFileNa
 
 void SCH_SCREENS::BuildClientSheetPathList()
 {
-    SCHEMATIC* sch = GetFirst()->Schematic();
+    SCH_SCREEN* first = GetFirst();
+
+    if( !first )
+        return;
+
+    SCHEMATIC* sch = first->Schematic();
 
     wxCHECK_RET( sch, "Null schematic in SCH_SCREENS::BuildClientSheetPathList" );
 

eeschema/sch_sexpr_plugin.cpp

@@ -410,12 +410,13 @@ SCH_SEXPR_PLUGIN::~SCH_SEXPR_PLUGIN()
 void SCH_SEXPR_PLUGIN::init( KIWAY* aKiway, const PROPERTIES* aProperties )
 {
     m_version   = 0;
-    m_rootSheet = NULL;
+    m_rootSheet = nullptr;
     m_props     = aProperties;
     m_kiway     = aKiway;
-    m_cache = NULL;
-    m_out = NULL;
+    m_cache     = nullptr;
+    m_out       = nullptr;
     m_fieldId   = 100; // number arbitrarily > MANDATORY_FIELDS or SHEET_MANDATORY_FIELDS
+    m_schematic = nullptr;
 }
 
 

include/printout.h

@@ -38,6 +38,7 @@ struct PRINTOUT_SETTINGS
         m_blackWhite    = true;
         m_pageCount     = 0;
         m_background    = false;
+        m_colorSettings = nullptr;
     }
 
     virtual ~PRINTOUT_SETTINGS()

pcbnew/drc/drc_rule.h

@@ -59,7 +59,8 @@ class DRC_SELECTOR
 {
 public:
     DRC_SELECTOR() :
-            m_Priority( 1 )
+            m_Priority( 1 ),
+            m_Rule( nullptr )
     { }
 
 public: