[perl #130599] [LTA] [REGRESSION] internal backtrace is spewed when trying to assign to a Blob type object (Blob[2] = 100)

Thu, 19 Jan 2017 22:38:54 -0800 

# New Ticket Created by  Aleks-Daniel Jakimenko-Aleksejev 
# Please include the string:  [perl #130599]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=130599 >


Code:
Blob[2] = 100


Result (2015.12,2016.02):
Cannot modify an immutable Blob[Int]
  in block <unit> at /tmp/ru89jxuA2R line 1


Result (HEAD):
Could not instantiate role 'Blob':
No such method 'nativesize' for invocant of type 'Perl6::Metamodel::ClassHOW'
  in any  at gen/moar/Metamodel.nqp line 2441
  in any protect at gen/moar/stage2/NQPCORE.setting line 802
  in any specialize at gen/moar/Metamodel.nqp line 2428
  in any specialize at gen/moar/Metamodel.nqp line 2644
  in any specialize at gen/moar/Metamodel.nqp line 2211
  in any compose at gen/moar/Metamodel.nqp line 3010
  in any make_pun at gen/moar/Metamodel.nqp line 1692
  in any find_method at gen/moar/Metamodel.nqp line 1720
in block <unit> at /tmp/ru89jxuA2R line 1



Actually, “Could not instantiate role 'Blob'” is arguably more correct, but the 
way it complains about “nativesize” is very LTA.

Bisectable points to 
https://github.com/rakudo/rakudo/commit/1e33bc5b86706e857688da714c776b4fcf1a4159

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