Function copy constructor not working

Hello, I'm using fenics2016.2 with Ubuntu 16.04.

Using the copy constructor of a Function leads to the following error:

mesh  = UnitCubeMesh(1,1,1)
V = FunctionSpace(mesh, "CG", 1)
u = Function(V)
v = Function(u)

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-37-95b245268c8a> in <module>()
----> 1 w = Function(v)

/usr/lib/python2.7/dist-packages/dolfin/functions/function.pyc in __init__(self, *args, **kwargs)
    260             if len(args) == 1:
    261                 # Copy constructor used to be here
--> 262                 raise RuntimeError("Use 'Function.copy(deepcopy=True)' for copying.")
    263             elif len(args) == 2:
    264                 i = args[1]

RuntimeError: Use 'Function.copy(deepcopy=True)' for copying.

A workaround is using v = Function(V, u.vector(),copy) or v = Function(V, u), but the first is intended for internal library use only, and the latter is not documented (but seems to work).

greetings Florian

Comments (3)