# Pastebin Ku5bn5Ak
fernando@MBP-de-Fernando Red-new % perl6-gdb-m  -I.  -MRed -e ' model Bla { has Int $.bla } '
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This is Rakudo Perl 6 running in the GNU debugger, which often allows the user to generate useful back-
traces to debug or report issues in Rakudo, the MoarVM backend or the currently running code.

This Rakudo version is 2018.01 built on MoarVM version 2018.01,
running on macosx (10.15) / darwin (19.0.0)

Type `bt full` to generate a backtrace if applicable, type `q` to quit or `help` for help.
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Reading symbols from /Applications/Rakudo/bin/moar...(no debugging symbols found)...done.
Starting program: /Applications/Rakudo/bin/moar --execname=/Applications/Rakudo/bin/perl6-gdb-m --libpath=/Applications/Rakudo/share/nqp/lib --libpath=/Applications/Rakudo/share/perl6/lib --libpath=/Applications/Rakudo/share/perl6/runtime /Applications/Rakudo/share/perl6/runtime/perl6.moarvm -I. -MRed -e \ model\ Bla\ \{\ has\ Int\ \$.bla\ \}\ 
Unable to find Mach task port for process-id 17589: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))
(gdb) bt full
No stack.
(gdb) run
Starting program: /Applications/Rakudo/bin/moar --execname=/Applications/Rakudo/bin/perl6-gdb-m --libpath=/Applications/Rakudo/share/nqp/lib --libpath=/Applications/Rakudo/share/perl6/lib --libpath=/Applications/Rakudo/share/perl6/runtime /Applications/Rakudo/share/perl6/runtime/perl6.moarvm -I. -MRed -e \ model\ Bla\ \{\ has\ Int\ \$.bla\ \}\ 
Unable to find Mach task port for process-id 17590: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))