Merge branch 'fix_warnings' into 'master'

Some memory tracer fixes/features, fix build warnings

See merge request ngsolve/netgen!688

libsrc/core/array.hpp

@@ -687,6 +687,7 @@ namespace ngcore
     size_t allocsize;
     /// that's the data we have to delete, nullptr for not owning the memory
     T * mem_to_delete;
+    MemoryTracer mt;
 
 
     using FlatArray<T,IndexType>::size;
@@ -708,6 +709,7 @@ namespace ngcore
     {
       allocsize = asize; 
       mem_to_delete = data;
+      mt.Alloc(sizeof(T)*asize);
     }
 
 
@@ -717,7 +719,10 @@ namespace ngcore
     {
       allocsize = asize;
       if(ownMemory)
+      {
         mem_to_delete = adata;
+        mt.Alloc(sizeof(T)*asize);
+      }
       else
         mem_to_delete = nullptr;
     }
@@ -733,8 +738,7 @@ namespace ngcore
 
     NETGEN_INLINE Array (Array && a2) 
     {
-      mt.Swap(0., a2.mt, sizeof(T) * a2.allocsize);
+      mt = std::move(a2.mt);
-
       size = a2.size; 
       data = a2.data;
       allocsize = a2.allocsize;
@@ -753,6 +757,7 @@ namespace ngcore
         {
           allocsize = size;
           mem_to_delete = data;
+          mt.Alloc(sizeof(T)*size);
           for (size_t i = 0; i < size; i++)
             data[i] = a2.data[i];
         }
@@ -772,6 +777,7 @@ namespace ngcore
     {
       allocsize = size;
       mem_to_delete = data;
+      mt.Alloc(sizeof(T)*size);
       /*
       for (size_t i = 0; i < size; i++)
         data[i] = a2[i];
@@ -788,6 +794,7 @@ namespace ngcore
     {
       allocsize = size;
       mem_to_delete = data;
+      mt.Alloc(sizeof(T)*size);
       size_t cnt = 0;
       for (auto val : list)
         data[cnt++] = val;
@@ -800,6 +807,7 @@ namespace ngcore
     {
       allocsize = size;
       mem_to_delete = data;
+      mt.Alloc(sizeof(T)*size);
       for(size_t i = 0; i <  a2.Size(); i++)
         data[i] = a2[i];
       for (size_t i = a2.Size(), j=0; i < size; i++,j++)
@@ -834,6 +842,9 @@ namespace ngcore
     NETGEN_INLINE void NothingToDelete () 
     { 
       mem_to_delete = nullptr;
+
+      // this memory is not managed by the Array anymore, so set the memory usage to 0
+      mt.Free(sizeof(T)*allocsize);
     }
 
     /// Change logical size. If necessary, do reallocation. Keeps contents.
@@ -1011,8 +1022,7 @@ namespace ngcore
     /// steal array 
     NETGEN_INLINE Array & operator= (Array && a2)
     {
-      mt.Swap(sizeof(T)*allocsize, a2.mt, sizeof(T)*a2.allocsize);
+      mt = std::move(a2.mt);
-
       ngcore::Swap (size, a2.size);
       ngcore::Swap (data, a2.data);
       ngcore::Swap (allocsize, a2.allocsize);
@@ -1086,8 +1096,7 @@ namespace ngcore
     
     NETGEN_INLINE void Swap (Array & b)
     {
-      mt.Swap(sizeof(T) * allocsize, b.mt, sizeof(T) * b.allocsize);
+      mt = std::move(b.mt);
-
       ngcore::Swap (size, b.size);
       ngcore::Swap (data, b.data);
       ngcore::Swap (allocsize, b.allocsize);
@@ -1096,6 +1105,7 @@ namespace ngcore
 
     NETGEN_INLINE void StartMemoryTracing () const
     {
+      if(mem_to_delete)
         mt.Alloc(sizeof(T) * allocsize);
     }
 
@@ -1105,7 +1115,6 @@ namespace ngcore
 
     /// resize array, at least to size minsize. copy contents
     NETGEN_INLINE void ReSize (size_t minsize);
-    MemoryTracer mt;
   };
 
   
@@ -1158,6 +1167,7 @@ namespace ngcore
     using Array<T>::allocsize;
     using Array<T>::data;
     using Array<T>::mem_to_delete;
+    using Array<T>::mt;
     // using Array<T>::ownmem;
 
   public:
@@ -1171,6 +1181,7 @@ namespace ngcore
           data = new T[asize];
           allocsize = size;
           mem_to_delete = data;
+          mt.Alloc(sizeof(T)*asize);
         }
     }
 
@@ -1191,6 +1202,7 @@ namespace ngcore
     ArrayMem(ArrayMem && a2)
       : Array<T> (a2.Size(), (T*)mem)
     {
+      mt = std::move(a2.mt);
       if (a2.mem_to_delete)
         {
           mem_to_delete = a2.mem_to_delete;
@@ -1233,6 +1245,7 @@ namespace ngcore
 
     ArrayMem & operator= (ArrayMem && a2)
     {
+      mt = std::move(a2.mt);
       ngcore::Swap (mem_to_delete, a2.mem_to_delete);
       ngcore::Swap (allocsize, a2.allocsize);
       ngcore::Swap (size, a2.size);

libsrc/core/bitarray.cpp

@@ -40,12 +40,13 @@ namespace ngcore
     if (owns_data)
       {
         delete [] data;
-        mt.Free(Addr(size)+1);
+        mt.Free(GetMemoryUsage());
       }
 
     size = asize;
     data = new unsigned char [Addr (size)+1];
-    mt.Alloc(Addr(size)+1);
+    owns_data = true;
+    mt.Alloc(GetMemoryUsage());
   }
 
   BitArray & BitArray :: Set () throw()

libsrc/core/bitarray.hpp

@@ -49,6 +49,7 @@ public:
   {
     ba2.owns_data = false;
     ba2.data = nullptr;
+    mt = std::move(ba2.mt);
   }
 
   template <typename T>
@@ -59,13 +60,17 @@ public:
     int cnt = 0;
     for (auto i = list.begin(); i < list.end(); i++, cnt++)
       if (*i) SetBit(cnt);
+    StartMemoryTracing();
   }
 
   /// delete data
   ~BitArray ()
   {
     if (owns_data)
+    {
       delete [] data;
+      mt.Free(GetMemoryUsage());
+    }
   }
 
   /// Set size, loose values
@@ -150,11 +155,11 @@ public:
   
   NGCORE_API auto * Data() const { return data; }
 
+  const size_t GetMemoryUsage() const { return owns_data ? (size+CHAR_BIT-1)/CHAR_BIT : 0; }
   const MemoryTracer& GetMemoryTracer() const { return mt; }
   void StartMemoryTracing() const
   {
-    if(owns_data)
+    mt.Alloc(GetMemoryUsage());
-      mt.Alloc(Addr(size)+1);
   }
 
 private:

libsrc/core/exception.cpp

@@ -50,7 +50,7 @@ namespace ngcore
   
   RangeException :: RangeException (// const std::string & where,
                                     const char * where,
-                                    int ind, int imin, int imax) : Exception("")
+                                    ptrdiff_t ind, ptrdiff_t imin, ptrdiff_t imax) : Exception("")
   {
     std::stringstream str;
     str << where << ": index " << ind << " out of range [" << imin << "," << imax << ")\n";
@@ -59,7 +59,7 @@ namespace ngcore
   }
   
 
-  void ThrowRangeException(const char * s, int ind, int imin, int imax)
+  void ThrowRangeException(const char * s, ptrdiff_t ind, ptrdiff_t imin, ptrdiff_t imax)
   {
     throw RangeException(s, ind, imin, imax);
   }
@@ -75,7 +75,7 @@ namespace ngcore
   }
 
 
-  void ThrowNotTheSameException(const char * s, long int a, long int b)
+  void ThrowNotTheSameException(const char * s, ptrdiff_t a, ptrdiff_t b)
   {
     throw ngcore::Exception(std::string(s) + ", a="+ToString(a) + ", b="+ToString(b) + GetBackTrace());     
   }

libsrc/core/exception.hpp

@@ -1,6 +1,7 @@
 #ifndef NETGEN_CORE_EXCEPTION_HPP
 #define NETGEN_CORE_EXCEPTION_HPP
 
+#include <cstddef>
 #include <sstream>         // for stringstream
 #include <stdexcept>       // for exception
 #include <string>          // for string
@@ -66,7 +67,7 @@ namespace ngcore
     /// where it occurs, index, minimal and maximal indices
     RangeException (// const std::string & where,
                     const char * where,
-                    int ind, int imin, int imax);
+                    ptrdiff_t ind, ptrdiff_t imin, ptrdiff_t imax);
     /*
     : Exception("")
       {
@@ -85,8 +86,8 @@ namespace ngcore
     }
   };
 
-  [[noreturn]] NGCORE_API void ThrowRangeException(const char * s, int ind, int imin, int imax);
+  [[noreturn]] NGCORE_API void ThrowRangeException(const char * s, ptrdiff_t ind, ptrdiff_t imin, ptrdiff_t imax);
-  [[noreturn]] NGCORE_API void ThrowNotTheSameException(const char * s, long int a, long int b);
+  [[noreturn]] NGCORE_API void ThrowNotTheSameException(const char * s, ptrdiff_t a, ptrdiff_t b);
   
   
   // Exception used if no simd implementation is available to fall back to standard evaluation
@@ -98,12 +99,12 @@ namespace ngcore
     constexpr operator bool() const { return false; } };
 
   namespace detail {
-    template <typename T>
+    template <typename T, typename Tmin, typename Tmax>
-    inline static void CheckRange(const char * s, const T& n, int first, int next)
+    inline static void CheckRange(const char * s, const T& n, Tmin first, Tmax next)
     {
       if constexpr (!IsSafe<decltype(n)>())
         if (n<first || n>=next)
-          ThrowRangeException(s, int(n), first, next);
+          ThrowRangeException(s, ptrdiff_t(n), ptrdiff_t(first), ptrdiff_t(next));
     }
 
     template <typename Ta, typename Tb>
@@ -112,10 +113,10 @@ namespace ngcore
      if constexpr (!IsSafe<decltype(a)>() || !IsSafe<decltype(b)>())
       if(a != b)
       {
-        if constexpr(std::is_same<decltype(a),size_t>() && std::is_same<decltype(b),size_t>())
+        if constexpr(std::is_integral_v<decltype(a)> && std::is_same_v<decltype(a),decltype(b)>)
           ThrowNotTheSameException(s, long(a), long(b)); \
         else
-          throw Exception(std::string(s) + "\t: not the same"+ToString(a) + ", b="+ngcore::ToString(b) + GetBackTrace());
+          throw Exception(std::string(s) + "\t: not the same, a="+ToString(a) + ", b="+ngcore::ToString(b) + GetBackTrace());
       }
     }
   } // namespace detail
@@ -128,7 +129,7 @@ namespace ngcore
 #define NG_EXCEPTION(s) ngcore::Exception(__FILE__ ":" NETGEN_CORE_NGEXEPTION_STR(__LINE__) "\t"+std::string(s))
 
 #if defined(NETGEN_ENABLE_CHECK_RANGE) && !defined(__CUDA_ARCH__)
-#define NETGEN_CHECK_RANGE(value, min, max_plus_one) ngcore::detail::CheckRange(__FILE__ ":" NETGEN_CORE_NGEXEPTION_STR(__LINE__) "\t", value, int(min), int(max_plus_one));
+#define NETGEN_CHECK_RANGE(value, min, max_plus_one) ngcore::detail::CheckRange(__FILE__ ":" NETGEN_CORE_NGEXEPTION_STR(__LINE__) "\t", value, min, max_plus_one);
 #define NETGEN_CHECK_SAME(a,b) ngcore::detail::CheckSame(__FILE__ ":" NETGEN_CORE_NGEXEPTION_STR(__LINE__) "\t", a, b);
 
 #define NETGEN_NOEXCEPT 

libsrc/core/memtracer.hpp

@@ -35,11 +35,16 @@ namespace ngcore
 
   class MemoryTracer
   {
-    #if defined(NETGEN_TRACE_MEMORY) && !defined(__CUDA_ARCH__)
+#if defined(NETGEN_TRACE_MEMORY) && !defined(__CUDA_ARCH__)
     NGCORE_API static std::vector<std::string> names;
     NGCORE_API static std::vector<int> parents;
 
-    static int CreateId(const std::string& name)
+    #if defined(NETGEN_CHECK_RANGE)
+    NGCORE_API static std::atomic<size_t> total_memory;
+    mutable size_t allocated_memory = 0;
+    #endif // NETGEN_CHECK_RANGE
+
+    static int CreateId(const std::string& name = "")
     {
       int id = names.size();
       names.push_back(name);
@@ -48,7 +53,7 @@ namespace ngcore
         std::cerr << "Allocated " << id << " MemoryTracer objects" << std::endl;
       return id;
     }
-    int id;
+    mutable int id = 0;
 
     public:
 
@@ -57,8 +62,33 @@ namespace ngcore
       id = CreateId(name);
     }
 
-    // not tracing
+    MemoryTracer() { }
-    MemoryTracer() : id(0) {}
+
+    MemoryTracer(const MemoryTracer & tracer)
+    {
+      (*this) = tracer;
+    }
+
+    MemoryTracer(MemoryTracer && tracer)
+    {
+      (*this) = std::move(tracer);
+    }
+
+    MemoryTracer & operator=(const MemoryTracer & tracer) {
+      if(tracer.id)
+        id = CreateId(names[tracer.id]);
+      return *this;
+    }
+
+    MemoryTracer & operator=(MemoryTracer && tracer) {
+      ngcore::Swap(id, tracer.id);
+
+      #if defined(NETGEN_CHECK_RANGE)
+      ngcore::Swap(allocated_memory, tracer.allocated_memory);
+      #endif // NETGEN_CHECK_RANGE
+
+      return *this;
+    }
 
     template <typename... TRest>
     MemoryTracer( std::string name, TRest & ... rest )
@@ -67,37 +97,47 @@ namespace ngcore
       Track(rest...);
     }
 
+    #if defined(NETGEN_CHECK_RANGE)
+    // check if all memory was freed when object is destroyed
+    ~MemoryTracer()
+    {
+      NETGEN_CHECK_SAME(allocated_memory, 0);
+    }
+    #endif // NETGEN_CHECK_RANGE
+
     NETGEN_INLINE void Alloc(size_t size) const
     {
+      #if defined(NETGEN_CHECK_RANGE)
+      // Trace also nameless Memtracer objects if range checks are active
+      if(!id && size)
+        id = CreateId();
+      #endif // NETGEN_CHECK_RANGE
+
       if(id && trace)
         trace->AllocMemory(id, size);
+
+      #if defined(NETGEN_CHECK_RANGE)
+      if(id)
+      {
+        allocated_memory += size;
+        total_memory += size;
+      }
+      #endif // NETGEN_CHECK_RANGE
     }
 
     void Free(size_t size) const
     {
       if(id && trace)
         trace->FreeMemory(id, size);
-    }
 
-    void Swap(size_t mysize, MemoryTracer& other, size_t other_size) const
+      #if defined(NETGEN_CHECK_RANGE)
+      if(id)
       {
-      if(!trace || (id == 0 && other.id == 0))
+        // check if we have at least size bytes of memory currently allocated (such that allocated_memory doesn't get negative)
-        return;
+        NETGEN_CHECK_RANGE(allocated_memory, static_cast<ptrdiff_t>(size), std::numeric_limits<ptrdiff_t>::max());
-      if(id == 0)
+        allocated_memory -= size;
-        return trace->ChangeMemory(other.id, mysize - other_size);
+        total_memory -= size;
-      if(other.id == 0)
+        #endif // NETGEN_CHECK_RANGE
-        return trace->ChangeMemory(id, other_size - mysize);
-
-      // first decrease memory, otherwise have artificial/wrong high peak memory usage
-      if(mysize<other_size)
-        {
-          trace->ChangeMemory(other.id, mysize-other_size);
-          trace->ChangeMemory(id, other_size-mysize);
-        }
-      else
-        {
-          trace->ChangeMemory(id, other_size-mysize);
-          trace->ChangeMemory(other.id, mysize-other_size);
       }
     }
 
@@ -148,6 +188,14 @@ namespace ngcore
 
     static const std::vector<std::string> & GetNames() { return names; }
     static const std::vector<int> & GetParents() { return parents; }
+    static size_t GetTotalMemory()
+    {
+      #if defined(NETGEN_CHECK_RANGE)
+      return total_memory;
+      #else
+      return 0;
+      #endif // NETGEN_CHECK_RANGE
+    }
 #else // defined(NETGEN_TRACE_MEMORY) && !defined(__CUDA_ARCH__)
   public:
     MemoryTracer() {}
@@ -157,7 +205,6 @@ namespace ngcore
 
     void Alloc(size_t /* size */) const {}
     void Free(size_t /* size */) const {}
-    void Swap(...) const {}
     int GetId() const { return 0; }
 
     template <typename... TRest>
@@ -166,6 +213,7 @@ namespace ngcore
     static std::string GetName(int /* id */) { return ""; }
     std::string GetName() const { return ""; }
     void SetName(std::string /* name */) const {}
+    static size_t GetTotalMemory() { return 0; }
 #endif // NETGEN_TRACE_MEMORY
   };
 } // namespace ngcore

libsrc/core/profiler.cpp

@@ -116,6 +116,7 @@ namespace ngcore
 #ifdef NETGEN_TRACE_MEMORY
   std::vector<std::string> MemoryTracer::names{"all"};
   std::vector<int> MemoryTracer::parents{-1};
+  std::atomic<size_t> MemoryTracer::total_memory{0};
 #endif // NETGEN_TRACE_MEMORY
 
 } // namespace ngcore

libsrc/core/python_ngcore_export.cpp

@@ -324,6 +324,8 @@ threads : int
 #endif // NETGEN_TRACE_MEMORY
     ;
 
+    m.def("GetTotalMemory", MemoryTracer::GetTotalMemory);
+
     py::class_<Timer<>> (m, "Timer")
     .def(py::init<const string&>())
     .def("Start", static_cast<void (Timer<>::*)()const>(&Timer<>::Start), "start timer")

libsrc/core/table.hpp

@@ -130,6 +130,7 @@ namespace ngcore
     {
       for (size_t i : IntRange(size+1))
         index[i] = i*entrysize;
+      mt.Alloc(GetMemUsage());
     }
 
     /// Construct table of variable entrysize
@@ -141,6 +142,7 @@ namespace ngcore
       index = TablePrefixSum (FlatArray<TI> (entrysize.Size(), entrysize.Data()));
       size_t cnt = index[size];
       data = new T[cnt];
+      mt.Alloc(GetMemUsage());
     }
 
     explicit NETGEN_INLINE Table (const FlatTable<T,IndexType> & tab2)
@@ -157,6 +159,7 @@ namespace ngcore
       size_t cnt = index[size];
       data = new T[cnt];
       this->AsArray() = tab2.AsArray();
+      mt.Alloc(GetMemUsage());
       /*
       for (size_t i = 0; i < cnt; i++)
         data[i] = tab2.data[i];
@@ -177,12 +180,14 @@ namespace ngcore
       data = new T[cnt];
       for (size_t i = 0; i < cnt; i++)
         data[i] = tab2.data[i];
+
+      mt.Alloc(GetMemUsage());
     }
 
     NETGEN_INLINE Table (Table && tab2)
       : FlatTable<T,IndexType>(0, nullptr, nullptr)
     {
-      tab2.mt.Free(tab2.GetMemUsage());
+      mt = std::move(tab2.mt);
       Swap (size, tab2.size);
       Swap (index, tab2.index);
       Swap (data, tab2.data);
@@ -210,7 +215,7 @@ namespace ngcore
 
     NETGEN_INLINE Table & operator= (Table && tab2)
     {
-      mt.Swap(GetMemUsage(), tab2.mt, tab2.GetMemUsage());
+      mt = std::move(tab2.mt);
       Swap (size, tab2.size);
       Swap (index, tab2.index);
       Swap (data, tab2.data);

libsrc/csg/csgeom.cpp

@@ -1211,7 +1211,7 @@ namespace netgen
 	PrintMessage (2, "Object ", i, " has ", tams->GetNT(), " triangles");
       }
       }
-    catch (exception)
+    catch (const std::exception &)
       {
 	cerr << "*************************************************************" << endl
 	     << "****   out of memory problem in CSG visualization        ****" << endl

libsrc/general/table.cpp

@@ -109,7 +109,7 @@ namespace netgen
       {
 	void * p = new char [(line.maxsize+5) * elsize];
 
-        if (line.maxsize*elsize)
+        if (line.maxsize && elsize)
           memcpy (p, line.col, line.maxsize * elsize);
 	delete [] (char*)line.col;
 

libsrc/interface/nginterface.cpp

@@ -2246,11 +2246,8 @@ int Ng_GetClosureNodes (int nt, int nodenr, int nodeset, int * nodes)
 
         if (nodeset & 2)  // Edges
           {
-            int edges[12];
+            auto edges = mesh->GetTopology().GetEdges (ElementIndex(nodenr));
-            // int ned;
+            for (int i = 0; i < edges.Size(); i++)
-            // ned = mesh->GetTopology().GetElementEdges (nodenr+1, edges, 0);
-            int ned = mesh->GetTopology().GetEdges (ElementIndex(nodenr)).Size();
-            for (int i = 0; i < ned; i++)
               {
                 nodes[cnt++] = 1;
                 nodes[cnt++] = edges[i]-1;

libsrc/interface/nginterface_v2.cpp

@@ -1041,7 +1041,7 @@ namespace netgen
                                                         build_searchtree);
               return ind - 1;
             }
-          catch(NgException e) // quads not implemented curved yet
+          catch(const NgException & e) // quads not implemented curved yet
             {
           for (SegmentIndex si = 0; si < mesh->GetNSeg(); si++)
             {

libsrc/interface/readuser.cpp

@@ -301,7 +301,7 @@ namespace netgen
                     in >> name;
                     cout << IM(3)  << len << " element are in group " << name << endl;
                     int hi, index;
-                    int fdnr, ednr;
+                    int fdnr=-1, ednr=-1;
 
                     in >> hi >> index >> hi >> hi;
                     int codim = get<1>(element_map[index]);
@@ -712,7 +712,7 @@ namespace netgen
     if(!UserFormatRegister::HaveFormat(format))
       throw Exception("Unknown format: " + format);
 
-    const auto & entry = UserFormatRegister::Get(format);
+    const auto entry = UserFormatRegister::Get(format);
     if(!entry.read)
       throw Exception("Reading format " + format + " is not implemented");
 

libsrc/interface/writeuser.cpp

@@ -39,7 +39,7 @@ bool WriteUserFormat (const string & format,
   if(!UserFormatRegister::HaveFormat(format))
     return true;
 
-  const auto & entry = UserFormatRegister::Get(format);
+  const auto entry = UserFormatRegister::Get(format);
   if(!entry.write)
     return true;
 

libsrc/linalg/densemat.cpp

@@ -49,7 +49,7 @@ namespace netgen
   {
     data = NULL; height = width = 0;
     SetSize (m2.Height(), m2.Width());
-    if (Height()*Width())
+    if (Height() && Width())
       memcpy (data, m2.data, sizeof(double) * (Height() * Width()));
   }
 
@@ -70,7 +70,7 @@ namespace netgen
     
     delete[] data;
     
-    if (h*w)  
+    if (h && w)  
       data = new double[h*w];
     else
       data = NULL;

libsrc/meshing/boundarylayer.cpp

@@ -788,9 +788,9 @@ namespace netgen
                 if(fabs(mat.Det()) > 1e-6)
                   break;
               }
-            int maxpos1;
+            int maxpos1 = 0;
-            int maxpos2;
+            int maxpos2 = 1;
-            double val = 0;
+            double val = ns[0] * ns[1];
             for (auto i : Range(ns))
               {
                 for (auto j : Range(i + 1, ns.Size()))

libsrc/meshing/improve3.cpp

@@ -1066,7 +1066,8 @@ double MeshOptimize3d :: SwapImproveEdge (
               bad3 += GetLegalPenalty();
         }
 
-      bool swap2, swap3;
+      bool swap2=false;
+      bool swap3=false;
 
       if (goal == OPT_CONFORM)
         {
@@ -2608,7 +2609,7 @@ double MeshOptimize3d :: SplitImprove2Element (
   // search for very flat tets, with two disjoint edges nearly crossing, like a rectangle with diagonals
   int minedge = -1;
   double mindist = 1e99;
-  double minlam0, minlam1;
+  double minlam0=0, minlam1=0;
 
   for (int i : Range(3))
   {

libsrc/meshing/meshclass.cpp

@@ -196,8 +196,8 @@ namespace netgen
         auto& el = mesh.SurfaceElement(velement);
         if(el.GetType() == TRIG)
           {
-            double seg_lam;
+            double seg_lam=-1;
-            double lam;
+            double lam=-1;
             auto seg = mesh.LineSegment(segs[i]);
                 for(auto k : Range(3))
                   {

libsrc/meshing/meshfunc.cpp

@@ -517,7 +517,6 @@ namespace netgen
        }
     while (!meshed);
 
-     {
     PrintMessage (3, "Check subdomain ", domain, " / ", mesh.GetNDomains());
 
     mesh.FindOpenElements(domain);
@@ -530,7 +529,6 @@ namespace netgen
       PrintError ("Surface mesh not consistent");
       throw NgException ("Stop meshing since surface mesh not consistent");
     }
-     }
     RemoveIllegalElements (mesh, domain);
     ConformToFreeSegments (mesh, domain);
   }

libsrc/meshing/meshtype.hpp

@@ -175,7 +175,8 @@ namespace netgen
     }
     constexpr PointIndex (t_invalid inv) : i(PointIndex::BASE-1) { ; }
     // PointIndex & operator= (const PointIndex &ai) { i = ai.i; return *this; }
-    constexpr operator int () const { return i; }
+    constexpr operator const int& () const { return i; }
+    explicit constexpr operator int& () { return i; }
     PointIndex operator++ (int) { PointIndex hi(*this); i++; return hi; }
     PointIndex operator-- (int) { PointIndex hi(*this); i--; return hi; }
     PointIndex & operator++ () { i++; return *this; }

libsrc/meshing/python_mesh.cpp

@@ -267,7 +267,7 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
     .def(py::init<int>())
     .def("__repr__", &ToString<PointIndex>)
     .def("__str__", &ToString<PointIndex>)
-    .def_property_readonly("nr", &PointIndex::operator int)
+    .def_property_readonly("nr", &PointIndex::operator const int&)
     .def("__eq__" , FunctionPointer( [](PointIndex &self, PointIndex &other)
                   { return static_cast<int>(self)==static_cast<int>(other); }) )
     .def("__hash__" , FunctionPointer( [](PointIndex &self ) { return static_cast<int>(self); }) )

libsrc/stlgeom/python_stl.cpp

@@ -224,7 +224,7 @@ NGCORE_API_EXPORT void ExportSTL(py::module & m)
     .def("GetVicinity", [] (shared_ptr<STLGeometry> self, int node, int size, string type) {
       NgArray<int> vic;
 
-      int trig;
+      int trig=-1;
       if(type == "trig")
         trig = node;
 

libsrc/visualization/vsmesh.cpp

@@ -266,7 +266,7 @@ namespace netgen
 
     
       }
-    catch (bad_weak_ptr e)
+    catch (const bad_weak_ptr & e)
       {
         // cout << "don't have a mesh to visualize" << endl;
         VisualScene::DrawScene();      
@@ -895,7 +895,7 @@ namespace netgen
 
     vstimestamp = meshtimestamp;
       }
-    catch (bad_weak_ptr e)
+    catch (const bad_weak_ptr & e)
       {
         PrintMessage (3, "vsmesh::buildscene: don't have a mesh to visualize");
         VisualScene::BuildScene (zoomall);

libsrc/visualization/vssolution.cpp

@@ -641,7 +641,7 @@ namespace netgen
     // delete lock;
     // mem_lock.UnLock();
       }
-    catch (bad_weak_ptr e)
+    catch (const bad_weak_ptr & e)
       {
         // cout << "don't have a mesh to visualize" << endl;
         VisualScene::DrawScene();      
@@ -1120,7 +1120,7 @@ namespace netgen
   
     clipplanetimestamp = max2 (vispar.clipping.timestamp, solutiontimestamp);
       }
-    catch (bad_weak_ptr e)
+    catch (const bad_weak_ptr & e)
       {
         PrintMessage (3, "vssolution::buildscene: don't have a mesh to visualize");
         VisualScene::BuildScene (zoomall);

ng/ngpkg.cpp

@@ -194,7 +194,7 @@ namespace netgen
         if(mesh->GetGeometry())
           ng_geometry = mesh->GetGeometry();
       }
-    catch (NgException e)
+    catch (const NgException & e)
       {
 	PrintMessage (3, e.What());
 	return TCL_ERROR;
@@ -269,7 +269,7 @@ namespace netgen
 	      geometry -> LoadSurfaces(infile);
 	  }
       }
-    catch (NgException e)
+    catch (const NgException & e)
       {
 	PrintMessage (3, e.What());
 	return TCL_ERROR;
@@ -551,7 +551,7 @@ namespace netgen
 	  }
       }
 
-    catch (NgException e)
+    catch (const NgException & e)
       {
 	Tcl_SetResult (interp, const_cast<char*> (e.What().c_str()), TCL_VOLATILE);
 	return TCL_ERROR;
@@ -582,7 +582,7 @@ namespace netgen
 	  {
 	    ng_geometry -> Save (string (cfilename));
 	  }
-	catch (NgException e)
+	catch (const NgException & e)
 	  {
 	    Tcl_SetResult (interp, const_cast<char*> (e.What().c_str()), TCL_VOLATILE);
 	    return TCL_ERROR;
@@ -1440,7 +1440,7 @@ namespace netgen
 	PrintMessage (1, "Meshing done, time = ", GetTime(), " sec");
       }
 
-    catch (NgException e)
+    catch (const NgException & e)
       {
 	cout << e.What() << endl;
       }

python/webgui.py

@@ -8,6 +8,9 @@ try:
     from webgui_jupyter_widgets import BaseWebGuiScene, WebGuiDocuWidget
     import webgui_jupyter_widgets.widget as wg
 except ImportError:
+    class BaseWebGuiScene:
+        pass
+
     wg = None
 
 def encodeData( data, dtype=None, encoding='b64' ):
@@ -214,9 +217,13 @@ def GetData(mesh, args, kwargs):
         d[name] = pnew
     return d
 
-base = object if wg is None else BaseWebGuiScene
+class WebGLScene(BaseWebGuiScene):
-class WebGLScene(base):
+    class Widget:
+        def __init__(self):
+            self.value = {}
+
     def __init__(self, obj, args=[], kwargs={}):
+        self.widget = self.Widget()
         self.obj = obj
         self.args = args
         self.kwargs = kwargs