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[200509281800] Steps to reproduce: 1) Crate DataObject from File Type template. Actions for the loader are written to layer xml. 2) Explore Loader....|Actions in <this layer in context> layer view 3) Try move Copy action after Delete IDE was freezed for more than 10 seconds. Many TopologicalSortExceptions (warnings) was thrown,
Created attachment 25329 [details] exception
Also see issue #64704.
Probably will not be touched for 5.0. Not easily solvable, I think. D&D-based reordering works OK when it is just adding a pair of ordering constraints to a newly added item (in your own layer). But when changing *existing* ordering constraints it becomes difficult to behave correctly. I worked for a long time on it already and was not able to make it always do the right thing. Might be possible to fix 100% but only if the layer filesystem has knowledge of its context, which might cause other unforeseen problems such as deadlocks (TBD). Probably better to not waste time on it; when we switch to a better system like Registry we can use numeric positioning techniques (e.g.) which are far easier to work with.
Please use the specific subcomponents when possible.
*** This issue has been marked as a duplicate of 72541 ***
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