yeetholmes619's blog

Drunk G++ : Runtime Error locally but AC on CF
By yeetholmes619, history, 6 weeks ago, In English

Hey I think I'm using my mac's clang llvm compiler to compile my code with the following flags : 

g++ -std=c++20 -DDEBUG -DYEET -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fno-sanitize=null -fno-sanitize=alignment $$$filename -o $$${filename%.*}

and when I compiled the following code : 291228049 and ran it against any test case of the problem 1398D - Colored Rectangles, I got the following :

Runtime Error

But as you can check out, the submission was accepted on Codeforces, which confuses me. How do I begin to understand what's going on?

Thanks for your help and let me know if you need any more information

Edit 1 : I tried to run with just the address sanitizer flag, and I still got a runtime error. Then I decided to remove all the sanitizers and I still got the error so I thought the "-DDEBUG" flag was the culprit and I was right :")

debug(dp) which was a 3-D std::array gave the error.

I'm still not sure why, but at least it's not a compiler issue, which would've been harder to debug, lol!

Thanks!

  • Vote: I like it
  • 0
  • Vote: I do not like it

»
6 weeks ago, # |
  Vote: I like it +3 Vote: I do not like it

Do not use multiple sanitizers at the same time, they may be incompatible. If I only run it though address sanitizer, there is no error, so might be false positive (at least for sample).

→ Reply
  • »
    »
    6 weeks ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Hey turns out it was an issue with my debugging code, specifically — debug(dp) where dp was a 3D std::array. Not exactly sure why but its at least not a compiler issue :) Thanks for your help!

    → Reply
»
6 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Auto comment: topic has been updated by yeetholmes619 (previous revision, new revision, compare).

→ Reply