Method in Section 5.2 of tutorial is dangerous

Bug #907813 reported by Garth Wells
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
FEniCS Book Project
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Bug Description

The method advocated in Section 5.2 for setting a P0 function is dangerous because it makes an assumption on the dof map that is not guaranteed. A manifestation of the problem is that the method breaks in parallel.

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