Drawing within the first 8 rows of an off-screen texture produces a full system hang

[randomouscrap98]

I can provide a simpler code example if necessary. I created a 1024x1024 off-screen render target, and any drawing commands within the first 8 rows causes a full system hang, requiring a hard reboot. It's currently happening in https://github.com/randomouscrap98/3ds_basicdraw/, particularly the "draw_centeredrect" function in https://github.com/randomouscrap98/3ds_basicdraw/blob/master/source/main.c, however I can create a simpler example if necessary, as it has been happening since the app did nothing at all. If you comment out the y < PAGE_EDGEBUF section, then start the app and try drawing near the top, you can (perhaps) discover the full system hang.

I'm not sure if the 1024x1024 size matters. Again, I can provide a super minimal code example if required.

[WinterMute]

A super minimal code example would be great.

[randomouscrap98]

OK, been trying to make a really small example and this is what I came up with: https://gist.github.com/randomouscrap98/e6d34e9f14a29c43db038135cdfd9371

It draws a small rectangle wherever you're touching, so you can test it out a bit better. As the code is now, I believe it doesn't crash. If you change PADGE_EDGE to say, 7 or less, then try drawing near the top of the screen, the system hangs and doesn't accept input.

After testing, it seems to only happen on this larger texture size. I tried 512 and it didn't crash when drawing in the first 8 rows. Furthermore, it seems to be the position of the final fill and not the position you provide which causes it to crash. For instance, DrawLine is a rotated rectangle (from what I've heard) and that one WILL crash if you don't increase PAGE_EDGE past 8 to account for the rotation.