Bug Report for permutation-string

[Enigma2612]

Bug Report for https://neetcode.io/problems/permutation-string

Please describe the bug below and include any steps to reproduce the bug or screenshots if possible.

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In a few of the test cases, when I submit the code, it is giving me a runtime error (string index out of range), but when I use the same test case and run my code against it, the code runs, but the answer does not match.

My code (Python):

class Solution:
    def checkInclusion(self, s1: str, s2: str) -> bool:
        check = {}
        for i in s1:
            check[i] = check.get(i, 0) + 1
        
        dic = {}
        size = len(s1)

        if len(s1) > len(s2):
            return False

        for i in range(size):
            dic[s2[i]] = dic.get(s2[i], 0) + 1             #This is the line that gives error

        if dic == check:           #This one
            return True
        
        for i in range(0, len(s2) - size):
            if dic == check:                
                return True
            dic[s2[i]] -= 1
            if not dic[s2[i]]:
                del dic[s2[i]]
            dic[s2[i+size]] = dic.get(s2[i+size], 0) + 1
            if dic == check:       #This one
                return True

        return False

If either of the 2 marked 'if' conditions are omitted, this bug pops up.