[petsc-dev] d9ca1df42eda25bc875149d6d493aad6e204c9ff

[Jed Brown]

Mark Adams <mfadams at lbl.gov> writes:

> This commit seems to have caused my MatShell code to break:
>
> [22]PETSC ERROR: Object is in wrong state
> [22]PETSC ERROR:  Vec is locked read only, argument # 1

Your MatShell code is probably using VecGetArray when it should be using
VecGetArrayRead.
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