Don't ask if path crosses barrier if the path *is* the barrier

[osmuser63783]

Browsing through notes I just noticed a small issue where the quest how the path crosses the barrier was asked where it shouldn't be:
https://www.openstreetmap.org/note/3680127
https://www.openstreetmap.org/note/3680126

I suspect this is because the way https://www.openstreetmap.org/way/199858771 is tagged highway=footway and barrier=city_wall. As a result SC asks the quest on every node of the way.

Not sure how common this kind of double tagging is.

How to Reproduce
Look at Chester city walls:

Expected Behavior
Don't ask the quest.

Versions affected
Originally reported in v52, still an issue in v56.0

[matkoniecz]

@osmuser63783

Thanks for reporting, current behaviour makes no sense and this tagging, while I would not use it, seems to not be clearly wrong.

[matkoniecz]

Also, this bug report is an excellent example of following rules described in https://www.chiark.greenend.org.uk/~sgtatham/bugs.html

[osmuser63783]

Wow, that was quick. Thank you!

[matkoniecz]

Note that change is not yet deployed: that requires making a new release and this bug is not big enough (see JOSM bug that in one old version swapped longitude and latitude on edit...) to justify making emergency one