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[Marie Rognes <660334@xxxxxxxxxxxxxxxxxx>]

We have added an additional strategy for evaluating functions on
semi-matching meshes. The three-dimensional version of the above
example (with "allow_extrapolation" = True) now runs without error. 

** Changed in: dolfin
       Status: Confirmed => Fix Committed

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https://bugs.launchpad.net/bugs/660334

Title:
  Assembling over subdomain fails

Status in DOLFIN:
  Fix Committed

Bug description:
  Following setup:

  I have a mesh (with FunctionSpace V) and a submesh (with FunctionSpace
  W). Assembling a linear form on V over this subdomain involving a
  coefficient from W will fail.

  I think the problem is that Dolfin would like to evaluate the function
  from W at the boundary of the subdomain. Maybe due to rounding errors
  this point lies outside the subdomain and the evaluation fails.

  It does not happen, if W is a CG or DG space.