Re: BUG #19702: decode() accepts Base64 payload after terminal padding

> On 10 Nov 2026, at 10:23, Daniel Gustafsson <daniel(at)yesql(dot)se> wrote:
>> On 9 Nov 2026, at 23:43, Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> wrote:

>> While I agree that we don't backpatch it to v18 or older, I think it
>> (or at least the base64url part) should go into v19 as well. v19 is
>> still in RC and base64url is new in v19, so there are no existing
>> users relying on the current behavior, and it would be better to make
>> base64url and base32hex consistent before the release.
>
> That's a good point, I'll prepare a backpatch for 19 for the relevant portions.

The attached is a patch against master for the full fix, and a cut-down version
fixing just base64url for v19, I thinmk that's what we can do for 19 at this
point. What do you think about this one?

--
Daniel Gustafsson