Prevents a segfault to occur.

Description

Prevents a segfault to occur. When calling the routine ion_copy, we implicitly call its finalizer, which can lead to a segfault, for instance in the case IonsTimeDependentDisplacements is present in the input file.

News snippet

Prevents a segfault to occur.

Checklist

• I have checked that my code follows the Octopus coding standards
• I have added tests for all the new features added in this request.

changed milestone to %13.0

added Bugfix label

assigned to @nicolastd

approved this merge request

enabled an automatic merge when the pipeline for 53d863ad succeeds

merged

mentioned in commit 596d4b15