The test for this ticket (which now resides in S03-sequence/basic.t) was fudged
for rakudo (todo 'mysterious').
AFAIU the code { 1 ... () } now throws an exception (just like shifting one
element from an empty list does). Therefore I changed the test (and unfudged
it):
throws_like { 1 ... () },
X::AdHoc,
'RT# 75698: empty list on right side of sequence operator does not cause
infinite loop (but throws exception)',
message => 'Element shifted from empty list';
The pull request for roast is here: https://github.com/perl6/roast/pull/46
