I don't know if the Subject of this topic makes any sense, but it will soon. So I went to the Editor and loaded up -1, preparing to make a -1 dark world kind of level (don't steal the idea). Dark world levels obviously need a lot of hazards :3 so I went to the objects tab-thingy and I tried scrolling up. I heard the error sound and the game stopped. Not X'd out or anything, it just stopped and didn't do anything, almost like those times when you get a semi full of lag dumped on your computer and everything freezes, except it was just for SMB. I pressed Alt+Tab (which you should know brings you back to your desktop [on windows] in almost all cases), and click the Super Meat Boy icon on the taskbar and it said something about an "Assertion Failure" and I skimmed through it, somewhere in it there was something about an "invalid library request". That might sound like it's something from a library website or something, but obviously it isn't because the SMB window had turned COMPLETELY BLACK. Then the options at the bottom of the Assertion Failure window thing were "Abort", "Retry" (the message said that the Retry button would attempt to debug it or something), and "Ignore". I clicked abort and the game X'd out. I restarted the Editor, and loaded up -1 again. This time I tried scrolling down, and it worked, but only for one object down, which happened to be Bandage/Bandaid Girl, and then I went down one more and it crashed again. I clicked abort and restarted the Editor again to see if it was just a glitch that happens every once in a while (I always check at least 3 times because, well, you never know if it's gonna work the next time), and it happened again. This time I clicked ignore, and another Assertion Failure window came up saying something about going outside bounds. I'm all like "wtf" and stuffs. I clicked ignore and then, yet another window popped up. This time it wasn't the Assertion Failure one, it was the normal Mini-Dump crash window. At that point I just gave up.
If anyone knows how to get around this, PLEASE let me know. Otherwise, fix it ASAP.