pointy blocks on repeat

[Patrick R. Michaud]

S04 says that pointy blocks are allowed on repeat while blocks
when the conditional is on either side of the block.  STD.pm
currently allows only the case where the conditional is in
front -- i.e., STD.pm doesn't currently recognize the form

    repeat -> $thing { ... } while something();

Is this just an oversight in STD.pm or is the second form not
allowed?

Thanks,

Pm