src/fflib/problem.cpp:5469: error: NULL_DEREFERENCE
  pointer `bb` last assigned on line 5468 could be null and is dereferenced at line 5469, column 23.
Showing all 10 steps of the trace


src/fflib/problem.cpp:5456:1: start of procedure isVF()
5454.   
5455.   
5456. > bool isVF(const list<C_F0> & largs)  // true => VF type of Matrix   
5457.   {
5458.     list<C_F0>::const_iterator ii,ib=largs.begin(),

src/fflib/problem.cpp:5458:3: Skipping _List_const_iterator: function or method not found
5456.   bool isVF(const list<C_F0> & largs)  // true => VF type of Matrix   
5457.   {
5458.     list<C_F0>::const_iterator ii,ib=largs.begin(),
          ^
5459.       ie=largs.end();
5460.       

src/fflib/problem.cpp:5461:3: 
5459.       ie=largs.end();
5460.       
5461. >   bool VVF =false;   
5462.     for (ii=ib;ii != ie;ii++)
5463.       {

src/fflib/problem.cpp:5462:8: Skipping operator=: function or method not found
5460.       
5461.     bool VVF =false;   
5462.     for (ii=ib;ii != ie;ii++)
               ^
5463.       {
5464.         Expression e=ii->LeftValue();

src/fflib/problem.cpp:5462:14: Loop condition is true. Entering loop body
5460.       
5461.     bool VVF =false;   
5462.     for (ii=ib;ii != ie;ii++)
                     ^
5463.       {
5464.         Expression e=ii->LeftValue();

src/fflib/problem.cpp:5464:7: Skipping LeftValue: function or method not found
5462.     for (ii=ib;ii != ie;ii++)
5463.       {
5464.         Expression e=ii->LeftValue();
              ^
5465.         aType r = ii->left();
5466.         if (r==atype<const  FormBilinear *>()) 

src/fflib/problem.cpp:5465:7: Skipping left: function or method not found
5463.       {
5464.         Expression e=ii->LeftValue();
5465.         aType r = ii->left();
              ^
5466.         if (r==atype<const  FormBilinear *>()) 
5467.           {

src/fflib/problem.cpp:5466:11: Taking true branch
5464.         Expression e=ii->LeftValue();
5465.         aType r = ii->left();
5466.         if (r==atype<const  FormBilinear *>()) 
                  ^
5467.           {
5468.             const  FormBilinear * bb=dynamic_cast<const  FormBilinear *>(e);

src/fflib/problem.cpp:5468:11: 
5466.         if (r==atype<const  FormBilinear *>()) 
5467.           {
5468. >           const  FormBilinear * bb=dynamic_cast<const  FormBilinear *>(e);
5469.             bool vvf  = bb->VF();
5470.             if( vvf &&  (bb->di->kind != CDomainOfIntegration::intalledges && bb->di->kind != CDomainOfIntegration::intallVFedges  )

src/fflib/problem.cpp:5469:11: 
5467.           {
5468.             const  FormBilinear * bb=dynamic_cast<const  FormBilinear *>(e);
5469. >           bool vvf  = bb->VF();
5470.             if( vvf &&  (bb->di->kind != CDomainOfIntegration::intalledges && bb->di->kind != CDomainOfIntegration::intallVFedges  )
5471.                &&  (bb->di->kind != CDomainOfIntegration::intallfaces ))