A workaround for it was added in
https://github.com/rakudo/rakudo/commit/1d69ebb9c2514fe5ae156998f71e4a112801b603
Without MVM_SPESH_DISABLE=1 it can give this kind of warning:
Block (from unknown) seen at:
/tmp/21S1e2RPQr, lines 107,115,122,69
Please use is-approx instead.
This is LTA but at l
# New Ticket Created by Aleks-Daniel Jakimenko-Aleksejev
# Please include the string: [perl #131935]
# in the subject line of all future correspondence about this issue.
# https://rt.perl.org/Ticket/Display.html?id=131935 >
See IRC log: https://irclog.perlgeek.de/perl6-dev/2017-08-20#i_150458