src/fflib/problem.hpp:521: error: NULL_DEREFERENCE pointer `bb` last assigned on line 519 could be null and is dereferenced by call to `LinearComb` at line 521, column 9. Showing all 17 steps of the trace src/fflib/problem.hpp:517:3: start of procedure FormBilinear 515. A di; 516. Foperator * b; 517. FormBilinear(const basicAC_F0 & args) { ^ 518. di= dynamic_cast(CastTo(args[0])); 519. B bb= dynamic_cast(CastTo(args[1])); src/fflib/problem.hpp:526:5: Skipping E_F0mps: function or method not found 524. 525. // delete bb; il ne faut pas detruire .. car bb peut etre dans une variable 526. ffassert(di && b); } ^ 527. 528. static ArrayOfaType typeargs() { return ArrayOfaType(atype(),atype());}// all type src/fflib/problem.hpp:518:4: Skipping operator[]: function or method not found 516. Foperator * b; 517. FormBilinear(const basicAC_F0 & args) { 518. di= dynamic_cast(CastTo(args[0])); ^ 519. B bb= dynamic_cast(CastTo(args[1])); 520. // b = bb->Optimize(currentblock); // FH1004 src/fflib/lgmesh3.hpp:28:1: start of procedure CastTo() 26. 27. template 28. > inline Expression CastTo(const C_F0 & f) { return atype()->CastTo(f);} 29. 30. // <> src/fflib/lgmesh3.hpp:28:44: Skipping operator_E_F0_*: function or method not found 26. 27. template 28. inline Expression CastTo(const C_F0 & f) { return atype()->CastTo(f);} ^ 29. 30. // <> src/fflib/lgmesh3.hpp:28:78: return from a call to CastTo 26. 27. template 28. inline Expression CastTo(const C_F0 & f) { return atype()->CastTo(f);} ^ 29. 30. // <> src/fflib/problem.hpp:519:4: Skipping operator[]: function or method not found 517. FormBilinear(const basicAC_F0 & args) { 518. di= dynamic_cast(CastTo(args[0])); 519. B bb= dynamic_cast(CastTo(args[1])); ^ 520. // b = bb->Optimize(currentblock); // FH1004 521. b=new Foperator(*bb); // FH1004 no optimisation here because we don't the type of the bilinear form here. src/fflib/lgmesh3.hpp:28:1: start of procedure CastTo<4a176e0d3c952e1c>() 26. 27. template 28. > inline Expression CastTo(const C_F0 & f) { return atype()->CastTo(f);} 29. 30. // <> src/fflib/lgmesh3.hpp:28:44: Skipping operator_E_F0_*: function or method not found 26. 27. template 28. inline Expression CastTo(const C_F0 & f) { return atype()->CastTo(f);} ^ 29. 30. // <> src/fflib/lgmesh3.hpp:28:78: return from a call to CastTo<4a176e0d3c952e1c> 26. 27. template 28. inline Expression CastTo(const C_F0 & f) { return atype()->CastTo(f);} ^ 29. 30. // <> src/fflib/problem.hpp:521:3: 519. B bb= dynamic_cast(CastTo(args[1])); 520. // b = bb->Optimize(currentblock); // FH1004 521. > b=new Foperator(*bb); // FH1004 no optimisation here because we don't the type of the bilinear form here. 522. // the opimisation is done after in FieldOfForm routine 523. // to find if the form is real or complex src/femlib/DOperator.hpp:80:4: start of procedure LinearComb 78. } 79. 80. LinearComb(const LinearComb &l) ^ 81. :v(l.v), 82. where_in_stack_opt(l.where_in_stack_opt), src/femlib/DOperator.hpp:84:69: Skipping E_F0mps: function or method not found 82. where_in_stack_opt(l.where_in_stack_opt), 83. mesh_indep_stack_opt(l.mesh_indep_stack_opt), 84. optiexp0(l.optiexp0),optiexpK(l.optiexpK),isoptimize(false){} ^ 85. 86. int nbtrue(bool *ok) const src/femlib/DOperator.hpp:81:8: Skipping vector: function or method not found 79. 80. LinearComb(const LinearComb &l) 81. :v(l.v), ^ 82. where_in_stack_opt(l.where_in_stack_opt), 83. mesh_indep_stack_opt(l.mesh_indep_stack_opt), src/femlib/DOperator.hpp:82:9: Skipping vector: function or method not found 80. LinearComb(const LinearComb &l) 81. :v(l.v), 82. where_in_stack_opt(l.where_in_stack_opt), ^ 83. mesh_indep_stack_opt(l.mesh_indep_stack_opt), 84. optiexp0(l.optiexp0),optiexpK(l.optiexpK),isoptimize(false){} src/femlib/DOperator.hpp:83:9: Skipping vector: function or method not found 81. :v(l.v), 82. where_in_stack_opt(l.where_in_stack_opt), 83. mesh_indep_stack_opt(l.mesh_indep_stack_opt), ^ 84. optiexp0(l.optiexp0),optiexpK(l.optiexpK),isoptimize(false){} 85. src/femlib/DOperator.hpp:84:9: 82. where_in_stack_opt(l.where_in_stack_opt), 83. mesh_indep_stack_opt(l.mesh_indep_stack_opt), 84. > optiexp0(l.optiexp0),optiexpK(l.optiexpK),isoptimize(false){} 85. 86. int nbtrue(bool *ok) const