[MC-133760] Structure block detect does not work

When I use a structure block with a corner block and press detect it gives an error message

This bug occurs in both 1.12.2 and 1.13pre9

The screenshots are from 1.12.2 but the error message is the same in both

Edit: I forgot to add I also tested minecraft:test and test:test in both versions

Attachments

You're not doing it right.

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sorry if im just being dumb but it appears we are doing the same thing

The position of the outlines can only stem from the corners of the structure block.

Strange, I tried using a larger area as well and it also did not work.

There's a limit to the size of structures: 32x32x32

Sorry that was bad wording, I meant I tried a shape very similar to yours and it did not work. I am aware of the limit.