PETScSNESSolver does not honor maximum_iterations

[Nico Schlömer]

When setting

# define problem and vector
# ...
from dolfin import PETScSNESSolver
solver = PETScSNESSolver()
solver.parameters['method'] = 'newtonls'
solver.parameters['maximum_iterations'] = 20
solver.solve(problem, vector)

the parameter maximum_iterations is not respected by the solver.

[Nico Schlömer]

Scratch that; it is the linear solver that is going out of control here.