[perl #130450] [REGRESSION] .Int-ing a non-numeric Str no longer throws, but returns a Failure instead (my $i = 'a'.Int)

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# New Ticket Created by  Aleks-Daniel Jakimenko-Aleksejev 
# Please include the string:  [perl #130450]
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Code:
my $i = 'a'.Int


Result (2015.12, 2016.03):
Cannot convert string to number: base-10 number must begin with valid digits or 
'.' in '⏏a' (indicated by ⏏)
  in block <unit> at /tmp/2R0qtbz9ME line 1

Actually thrown at:
  in block <unit> at /tmp/2R0qtbz9ME line 1
 «exit code = 1»


Result (HEAD):
(Failure)


So instead of throwing it just gives a Failure object.

Bisectable points to 
https://github.com/rakudo/rakudo/commit/1cb2e8d9e71797f576b3ffc01129a196e30a9bad

I find the current behavior a bit surprising, but feel free to argue with that.