Hello,
I have struggled today with a mysterious problem. It occurred in my
solver, where the assembly and linear algebra happens in a different
function from the output. The Function that holds the data after the
call to pde.solve(u) seems to be invalidated after the LinearSolver goes
out of scope.
To illustrate what I mean, I made a small modification to the Poisson demo:
PoissonBilinearForm a;
PoissonLinearForm L(f, g);
LinearPDE* pde = new LinearPDE(a, L, mesh, bc); // dynamic allocation
// Solve PDE
Function u;
pde->solve(u);
// Save solution to file
File file("poisson.pvd");
file << u; // this works
delete pde; // pde goes out of scope
File file2("poisson2.pvd");
file2 << u; // segfault here
I do realize that the destructor in LinearPDE does not delete the pointer!
