On Tue, Aug 06, 2024 at 01:46:35PM -0500, Justin Tobler wrote:
> On 24/08/05 03:08PM, Patrick Steinhardt wrote:
> > REFTABLE_CALLOC_ARRAY(table_locks, last - first + 1);
> > - for (i = first; i <= last; i++) {
> > - stack_filename(&table_name, st, reader_name(st->readers[i]));
> > + for (i = last + 1; i > first; i--) {
> > + stack_filename(&table_name, st, reader_name(st->readers[i - 1]));
>
> I might be missing something, but why not set `i = last` and `i >=
> first`? It looks like everywhere we reference `i` we subtract one
> anyways. Since `last` is already at the starting index, it seems it
> would be a bit more straightforward.
You are missing the case where `first == 0`. With `first = 0`, `i >=
first` would be truish when `i == 0` and thus we would continue to loop.
We then execute `i--`, wrap around, and still have `i >= first`.
Thus, an endless loop is born :)
Patrick
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