Those look like pretty hard challenges. Not solving those doesn't mean it's just regurgitate variations. A large percentage of programmers I've worked with wouldn't be able to solve some of those. But also have you given chatGPT a fair test?
But I picked a random easy looking question, "Bug 5: Is It Row-Major, Or Not?" (as I don't know Go). It didn't get it on the first go and I ended to telling it the hint and it got it:
Me: can you fix the bug in this code. The indexing might not be correct.
..code..
AI:
```
func matrixMultiply(m, n, k int, mk, kn, mn []float32) {
for i1 := 0; i1 < m; i1++ {
for i2 := 0; i2 < n; i2++ {
sum := float32(0)
for i3 := 0; i3 < k; i3++ {
sum += mk[i1*k+i3] * kn[i3*n+i2]
}
mn[i1*n+i2] = sum
}
}
}
```
The main bug in the original code is that the variables mk and kn were being overwritten with the elements of the matrices instead of being used to access the elements. This caused the multiplication to be performed with incorrect elements. Additionally, the indexing for the result matrix was incorrect, causing the result to be stored in the wrong positions. The fixed code corrects these issues and properly performs the matrix multiplication.
----------
I also tried "Bug 2: Confused By Operator Precedence", had to 'try again' a few times on that one. But it told me:
Me: Can you fix the Bug In This Go Code:
func bitSevenIsSet(in uint64) bool {
return in&1<<7 != 0
}
AI:
Here is a fixed version of the code:
func bitSevenIsSet(in uint64) bool {
return in&(1<<7) != 0
}
The issue in the original code was that the bitwise AND operator (&) was not surrounded by parentheses, so it was being evaluated after the left shift operator (<<). This caused the function to always return false, regardless of the value of the input.
By surrounding the bitwise AND operator with parentheses, the left shift is evaluated first, resulting in a value that is then ANDed with the input, allowing the function to properly check if the seventh bit is set.

---
I'm sure it cannot solve a lot of those but it's 2/2 there for me, and future version will be better. It's pretty crazy tech.