Failing query leaves a layout in "under construction" mode

[klayoutmatthias]

Use this (incorrect) query on a layout:

with instances from cells ..via do inst.property("X") = 1

After running this query, an error is reported and the layout is in "under construction" state. Finally the application crashes.

[klayoutmatthias]

BTW: the right version is:

with instances of cells ..via do inst.set_property("X", 1)

while this is wrong, but does not give any error:

with instances from cells ..via do inst.set_property("X", 1)