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[Garth Wells <663949@xxxxxxxxxxxxxxxxxx>]

Has anyone looked at this?

** Changed in: dolfin
   Importance: Medium => High

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https://bugs.launchpad.net/bugs/663949

Title:
  Form assembly crashes for derivative without 3rd argument

Status in DOLFIN:
  Confirmed

Bug description:
  
  Reproduce with:

  mesh = UnitSquare(1, 1)
  V = FunctionSpace(mesh, "CG", 1)
  u = Function(V)
  v = TestFunction(V)
  F = u*v*dx
  a = derivative(F, u)
  A = assemble(a)