Cannot call decode on bytes created from strip

[bbannier]

All of the following functions fail at runtime with

uncaught exception hilti::rt::InvalidIterator: bound object has expired (/private/tmp/decode.spicy:7:2)

module foo;
import spicy;

global CS = spicy::Charset::ASCII;  # Other charsets seem fine.

function k() {
	print b" a ".strip().decode(CS);
}

function l() {
	local xs = b" a ";
	print xs.strip().decode(CS);
}
function m() {
	local xs = b" a ";
	local ys : bytes = xs.strip();
	print ys.decode(CS);
}

k();
l();
m();