[perl #130412] [REGRESSION] It is no longer possible to return -Inf from the signature (sub foo(--> -Inf) {})

[via RT]

# New Ticket Created by  Aleks-Daniel Jakimenko-Aleksejev 
# Please include the string:  [perl #130412]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=130412 >


Code:
sub foo ( --> -Inf) {  }; say foo


Result(2016.11):
-Inf


Result(HEAD):
===SORRY!=== Error while compiling -e
Malformed return value
at -e:1
------> sub foo ( -->⏏ -Inf) {  }; say foo



Bisectable points to 
https://github.com/rakudo/rakudo/commit/ae614f94b0fe2ff4e95579bc4200e4c1d83ce9e4