I’m sorry to ask this without specific cases(i can’t find that), but our team guess that the following code raise the `DivideError`

.

```
while y != zero(R)
q = div(x, y)
x, y = y, x - y * q
s0, s1 = s1, s0 - q * s1
t0, t1 = t1, t0 - q * t1
end
```

The `while`

guarantees that `y`

is nonzero hence `div`

must work properly, but error occurs. Anybody has a clue?

ps. One coworker guessed that the large integers may be a suspect. Is it possible? If then, how we overcome this issue? `BigInt`

?

ps2. I just found a case!

```
julia> div(-9223372036854775808,-1)
ERROR: LoadError: DivideError: integer division error
Stacktrace:
[1] div(x::Int64, y::Int64)
@ Base .\int.jl:284
```

Is this overflow issue?

```
julia> typemax(Int64)
9223372036854775807
julia> -9223372036854775808
-9223372036854775808
```