[perl #130714] [LTA] Already has attribute error lacks location of the offending line

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# New Ticket Created by  Zoffix Znet 
# Please include the string:  [perl #130714]
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# <URL: https://rt.perl.org/Ticket/Display.html?id=130714 >


While the error is descriptive, it doesn't say where the offending duplicated 
attribute is located. If possible, would be nice to include a line number or 
file.
 
    <Zoffix> m: class { has $.foo; has $.foo }
    <camelia> rakudo-moar c98b3a: OUTPUT«===SORRY!===␤Package '<anon|72589088>' 
already has an attribute named '$!foo'␤»
    <Zoffix> m: class { has $foo; has $foo }