[petsc-dev] MatAssembly removes all preallocation info

[Kong, Fande]

Hi All,

A matrix is created with the right preallocation, and then MatAssembly is
called. The preallocation info will be removed. We insert any values then,
and will encounter an malloc error.

My question is that we was intending to design like this way? Attached
simple example demonstrates what I am talking about.



Fande,
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