[perl #130630] [LTA] [REGRESSION] Rat-ifying a malformed number points to Metamodel.nqp (say “4​2”.Rat.nude)

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# New Ticket Created by  Aleks-Daniel Jakimenko-Aleksejev 
# Please include the string:  [perl #130630]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=130630 >


Code:
say “4​2”.Rat.nude


Result (2015.12,2016.06):
Cannot convert string to number: trailing characters after number in '4⏏​2' 
(indicated by ⏏)
  in block <unit> at /tmp/WEcSEIS5b4 line 1

Actually thrown at:
in block <unit> at /tmp/WEcSEIS5b4 line 1



Result (2016.12,HEAD):
Cannot convert string to number: trailing characters after number in '4⏏​2' 
(indicated by ⏏)
  in block <unit> at /tmp/WEcSEIS5b4 line 1

Actually thrown at:
  in any  at gen/moar/Metamodel.nqp line 3072
in block <unit> at /tmp/WEcSEIS5b4 line 1



The error message should not contain lines from Metamodel.nqp.

Bisectable points to 
https://github.com/rakudo/rakudo/commit/f294652a890fb9003e10b54e4b2e0e0594ab34e6