julia

5b6fe650 - in `copyto_impl!`, shadow a name as intended to ensure type stability (#54204)

in `copyto_impl!`, shadow a name as intended to ensure type stability (#54204) Not sure how much this matters, if at all, given that the compiler seems to be pretty smart nowadays, but clearly the intent behind the code was to shadow `src` with the `let` block, to prevent the variable from changing type during run time. NB: union splitting seems to save the day anyway, but "better be safe than sorry", I guess