Retired as a duplicate. See https://github.com/codewars/content-issues/issues/49.

JS tests: size=1..20
Ruby tests: size=0...50
Python tests: 1...1000, blowing up the output buffer on failure.

You're doing recursion wrong, that's why your code fails. You need to return the recursive call to your function.

Nothing really doable about that: when the output is wrong, expected and actual are printed to the console, which is limited. Considering the size of the matrices, any wrong code will saturate the buffer. Nothing to do about that. You won't see the problem if you have a working code.

The only problem is if you use a language which is showing the expected result even when the test is passing... => is that the case? (not closing to keep the edit panel accessible)

I'm afraid not, since the task is literally creating an m*n table.

Does anyone know a solution for this that is not O(n^2)?

multiplication_table(860,804)

STDERR
Max Buffer Size Reached (1.5 MiB)

please fix

Great kata!

I know that variables are references to objects

Do you know something about references/pointers/aliases?