[perl #129911] [BUG] Rat literals Misinterpreted as regex in signatures

[via RT]

# New Ticket Created by  Zoffix Znet 
# Please include the string:  [perl #129911]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=129911 >


I kinda thought this would work:

     <ZoffixW> m: multi foo (1/3) {}
     <camelia> rakudo-moar 20d37a: OUTPUT«===SORRY!=== Error while  
compiling <tmp>␤Unable to parse regex; couldn't find final '/'␤at  
<tmp>:1␤------> multi foo (1/3⏏) {}␤    expecting any of:␤         
infix stopper␤»

Given this works:

     <ZoffixW> m: multi foo (1.3) {}
     <camelia> rakudo-moar 20d37a: ( no output )
     <ZoffixW> m: multi foo (1e3) {}
     <camelia> rakudo-moar 20d37a: ( no output )
     <ZoffixW> m: multi foo (1) {}
     <camelia> rakudo-moar 20d37a: ( no output )