I wanna add a problem in polygon and it seems fine in tests and invocations. But when I wanna create package, it says PackageException: Failed on verification of the first test: Interactor 'interactor.cpp' returns exit code -1073741819. I try to fix it but failed. What problem may I have?
UPD: Thank MikeMirzayanov for help. He improved diagnostic messages so that I can know where I have problem.
Maybe it's UB? Download your interactor and run it on input files yourself.
Also, the generator must be deterministic. It must produce the same test every time if ran with the same arguments.
Thank you, but it works well when I test on my computer.
My generator is deterministic but interactor not. Is that OK? I use
rnd.setSeed(time(NULL));in my interactor, however when I change it to something likernd.setSeed(1);, it still have the error.By the way, although my interactor is sometime randomly, it will
toutthe same thing for right answer(0) and wrong answer(-1). (I changed it just now but it still says the same error)Don't use time as a seed in generators or interactors. Polygon might try to check if everything is same if ran twice.
I guess you must experiment a little bit. Make your interactor simpler, just return verdict "OK" immediately, something like that. See if the error still happens. Try to find a place that causes the error.
Here's how return codes work: the OS executes your program, the program leaves the return code in a specified register (of the processor) and when it terminates, the OS checks that register for the return code.
Your program can terminate normally, in which case it leaves behind some return code defined in your source, but also by throwing an exception. Some exceptions are hardware-generated (like divide by zero or segfault, which is accessing a forbidden section of memory), but they're caught in such a way that the OS still gets specific return codes associated with them.
Return codes like that basically mean "garbage bits left over from some previous operation", so your code simply crashed really badly, so badly you aren't even told why.
The worst thing is when code crashes, but you don't see it, because the garbage bits are 0 (but at least it fails to give you an output). I've encountered it locally several times.
Can you try again? I tried to improve diagnostic messages.
Yeah, thanks! It says
PackageException: There exists an output where checker/interactor crashes, output description is "Single line containing '1000000000 1000000000' (without quotes)". Expected exit codes are 0, 1, 2 or 7, but 0 found..But I don't know where that output description comes from. And the exit code seems no problem.
It means your checker/interactor fails if reads
Single line containing '1000000000 1000000000' (without quotes). I.e. consider participant prints it, checker/interactor should handle it properly.Oh yeah! Thanks for your help. I found my mistake with this information. I really didn't handle it properly.