Merge removing a folder with non-inheritable mergeinfo -> E155023: can't set properties: invalid status for updating properties

A merge failed with
svn: E155023: Can't set properties on '/.../folder': invalid status for updating properties.

Reproduced in a test (attached) that merges the removal of a folder that had non-inheritable mergeinfo.

The merge and its output look like:

svn merge -c5 ^/branch_A .../A
--- Merging r5 into '.../A':
D    .../A/D
svn: E155023: Can't set properties on '/.../A/D/gamma': invalid status for updating properties

When a merge deletes a folder then surely it is a bug if it tries to update properties inside that folder.