Ticket #1106 (closed bug: fixed)

Opened 5 years ago

Last modified 3 years ago

Cannot presently dump Class pmcs

Reported by: Austin_Hastings Owned by: whiteknight
Priority: minor Milestone: 3.0
Component: library Version: 1.6.0
Severity: medium Keywords:
Cc: Language:
Patch status: Platform: all


Invoking _dumper (the front end to Data::Dumper) on a RPA returned from the .parents() method of a P6object class produces an exception:

"VAR1" => ResizablePMCArray (size:2) [
    Class {get_iter() not implemented in class 'Class'
current instr.: 'parrot;Data::Dumper::Default;genericHash' pc 125 (runtime/parrot/library/Data/Dumper/Default.pir:127)
called from Sub 'parrot;Data::Dumper::Base;dump' pc 382 (runtime/parrot/library/Data/Dumper/Base.pir:252)
called from Sub 'parrot;Data::Dumper::Default;genericArray' pc 421 (runtime/parrot/library/Data/Dumper/Default.pir:323)
called from Sub 'parrot;Data::Dumper::Base;dump' pc 382 (runtime/parrot/library/Data/Dumper/Base.pir:252)
called from Sub 'parrot;Data::Dumper::Default;dumpWithName' pc 40 (runtime/parrot/library/Data/Dumper/Default.pir:57)
called from Sub 'parrot;Data::Dumper;dumper' pc 69 (runtime/parrot/library/Data/Dumper.pir:44)
called from Sub '_dumper' pc 66 (runtime/parrot/library/dumper.pir:93)
called from Sub 'parrot;Grand2;main' pc 24958 (src/gen_classtest.pir:10552)
called from Sub 'parrot;Grand2;_ONLOAD' pc 24771 (src/gen_classtest.pir:10491)
called from Sub 'parrot;Grand2;_block99' pc 24673 (src/gen_classtest.pir:10459)
make: *** [classtest] Error 1

I don't know if dumper was using genericHash because the class pmc identified itself as a hash, or if because Hash is the eventual root of the class hierarchy. Regardless, crash-and-exit seems inappropriate behavior.

Change History

Changed 5 years ago by whiteknight

Are there any other PMC types that have this problem, or is it just Class? I'm trying to see if it is a problem with the mechanism or a problem with this particular PMC.

Changed 4 years ago by coke

Austin - it would be helpful if you could provide a PIR snippet to reproduce this problem. Thanks!

Changed 3 years ago by whiteknight

  • owner set to whiteknight

Changed 3 years ago by whiteknight

  • priority changed from normal to minor
  • platform set to all
  • component changed from none to library
  • milestone set to 3.0

The following code snippet works for me and does not throw an unhandled exception like what was posted in the ticket:

{{ .sub main :main

load_bytecode 'Data/Dumper.pbc' $P0 = newclass 'Foo' $P1 = new ["Data";"Dumper"] $P1.'dumper'($P0)

.end }}}

this isn't the _dumper function like was mentioned, but it is Data::Dumper and it does dump a Class PMC without problems. Unless I can see some kind of concrete counter-example, I'm going to close this ticket in a few days.

Changed 3 years ago by whiteknight

  • status changed from new to assigned

Changed 3 years ago by bacek

  • status changed from assigned to closed
  • resolution set to fixed

No one complains. Closing ticket.

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