do you have a video?
can you post a screenshot of where you died
also, which version do you use, 1.0 or 1.1? you can find information on this here https://tcrf.net/Super_Mario_Land
then, the next question is what console did you play on? super gameboy 1, super gameboy 2, gameboy player, gameboy, gameboy color, gameboy advance, emu (which one, which version of it), etc.
Maybe this is just a fake. It wouldn't be the first time someone posted about an amazing skip to seek attention and it turned out fake. It's apparent because the user has done little to provide information on the subject.
Thank you, please answer my other question: What game version did you use?
1.0 or 1.1? Go here https://tcrf.net/Super_Mario_Land#Revisional_Differences and listen to the audio files, then go to your game and check if it is 1.0 or 1.1.
Reading this topic again... First I want to apologize for flooding Pixql with my barrage of questions. I was just so excited about this bug and wanted to learn as much as I could. And I want to thank Pixql for reporting this bug to the public and for the information he gave.
This bug looks possible to happen at an extremely rare chance, but it's not plausible to us yet.
Map scroll bug ( http://tasvideos.org/forum/viewtopic.php?p=462250#462250 ) can be reproduced. The very basic explanation why it happens is: the game does "half frames" and cuts the frames at a bad timing. I thought the checkpoint bug could have a similar reason or source. But when you die, there are little operations going on, and the game doesn't cut frames. So we aren't sure how this bug could have happened.
The Starman crash ( http://tasvideos.org/forum/viewtopic.php?p=462369#462369 ) happens because the game messes up when handling music, it seems. But it's super rare.
If I knew how the checkpoint bug could possibly have happened, I could investigate better and try to track it down. Of course a video or more reports of this happening would help!
Thanks for reading