Failed assert

gistfile1.txt

    dogbert@dogbert-VirtualBox ~/repos/rakudo $ MVM_JIT_DISABLE=1 ./perl6-gdb-m -Ilib t/spec/S04-phasers/in-loop.rakudo.moar
    ================================================================================================
    This is Rakudo Perl 6 running in the  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 2019.03.1.539.g.5.e.79177 built on MoarVM version 2019.05.21.g.9.ed.86.e.4,
    running on linuxmint (18.3.Sylvia) / linux (42.16.04.1.Ubuntu.SMP.Tue.Oct.10.16.32.20.UTC.2017)
    
    Type `bt full` to generate a backtrace if applicable, type `q` to quit or `help` for help.
    ------------------------------------------------------------------------------------------------
    Reading symbols from /home/dogbert/repos/rakudo/nqp/MoarVM/../../install/bin/moar...done.
    Starting program: /home/dogbert/repos/rakudo/install/bin/moar --execname=/home/dogbert/repos/rakudo/perl6-gdb-m --libpath=/home/dogbert/repos/rakudo --libpath=/home/dogbert/repos/rakudo/blib --libpath= --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib /home/dogbert/repos/rakudo/perl6.moarvm --nqp-lib=/home/dogbert/repos/rakudo/blib -Ilib t/spec/S04-phasers/in-loop.rakudo.moar
    [Thread debugging using libthread_db enabled]
    Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
    [New Thread 0x7ffff6224700 (LWP 30241)]
    WARNINGS for /home/dogbert/repos/rakudo/t/spec/S04-phasers/in-loop.rakudo.moar:
    Useless use of constant integer 42 in sink context (line 166)
    1..20
    not ok 1 - trait blocks work properly in for loop # TODO NEXT/LEAVE ordering RT #124952
    # Failed test 'trait blocks work properly in for loop'
    # at t/spec/S04-phasers/in-loop.rakudo.moar line 37
    # expected: '(1 F)(1 E)(1 a)(1 N)(1 Lv)(2 E)(2 a)(2 b)(2 N)(2 Lv)(3 E)(3 a)(3 N)(3 Lv)(4 E)(4 Lv)(4 Lst)'
    #      got: '(1 F)(1 E)(1 a)(1 N)(1 Lv)(2 E)(2 a)(2 b)(2 Lv)(2 N)(3 E)(3 a)(3 N)(3 Lv)(4 E)(4 Lv)(4 Lst)'
    not ok 2 - trait blocks work properly in for loop # TODO NEXT/LEAVE ordering RT #124952
    # Failed test 'trait blocks work properly in for loop'
    # at t/spec/S04-phasers/in-loop.rakudo.moar line 68
    # expected: '(1 F1)(1 F2)(1 E1)(1 E2)(1 a)(1 N2)(1 N1)(1 Lv2)(1 Lv1)(2 E1)(2 E2)(2 a)(2 b)(2 N2)(2 N1)(2 Lv2)(2 Lv1)(3 E1)(3 E2)(3 a)(3 N2)(3 N1)(3 Lv2)(3 Lv1)(4 E1)(4 E2)(4 Lv2)(4 Lv1)(4 Lst2)(4 Lst1)'
    #      got: '(1 F1)(1 F2)(1 E1)(1 E2)(1 a)(1 N2)(1 N1)(1 Lv2)(1 Lv1)(2 E1)(2 E2)(2 a)(2 b)(2 Lv2)(2 Lv1)(2 N2)(2 N1)(3 E1)(3 E2)(3 a)(3 N2)(3 N1)(3 Lv2)(3 Lv1)(4 E1)(4 E2)(4 Lv2)(4 Lv1)(4 Lst1)(4 Lst2)'
    ok 3 - LAST does not fire for empty loop
    ok 4 - "last" statement called by LEAVE breaks out of while loop
    ok 5 - LEAVE in while loop works as expected
    ok 6 - no UnwindException with "last" and "ENTER" in for loop
    ok 7 - LAST phaser without block does not put Mu in the iteration variable
    ok 8 - LAST phaser with    block does not put Mu in the iteration variable
    ok 9 - FIRST in loop works fine with recursion
    ok 10 - NEXT in loop works fine with recursion
    ok 11 - LAST in loop works fine with recursion
    ok 12 - NEXT can see outer $_
    ok 13 - LAST can see outer $_
    ok 14 - POST should not see outer $_
    Use of uninitialized value element of type Any in string context.
    Methods .^name, .perl, .gist, or .say can be used to stringify it to something meaningful.
      in block  at t/spec/S04-phasers/in-loop.rakudo.moar line 174
    not ok 15 - KEEP should not see outer $_ # TODO KEEP should not see outer 
    # Failed test 'KEEP should not see outer $_'
    # at t/spec/S04-phasers/in-loop.rakudo.moar line 174
    moar: src/gc/collect.c:589: MVM_gc_collect_free_nursery_uncopied: Assertion `item->sc_forward_u.forwarder != NULL' failed.
    
    Thread 1 "moar" received signal SIGABRT, Aborted.
    0x00007ffff6f8d428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
    54	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
    (gdb) bt
    #0  0x00007ffff6f8d428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
    #1  0x00007ffff6f8f02a in __GI_abort () at abort.c:89
    #2  0x00007ffff6f85bd7 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x7ffff76e9f00 "item->sc_forward_u.forwarder != NULL", file=file@entry=0x7ffff76e9da1 "src/gc/collect.c", 
        line=line@entry=589, function=function@entry=0x7ffff76e9fc0 <__PRETTY_FUNCTION__.17170> "MVM_gc_collect_free_nursery_uncopied") at assert.c:92
    #3  0x00007ffff6f85c82 in __GI___assert_fail (assertion=0x7ffff76e9f00 "item->sc_forward_u.forwarder != NULL", file=0x7ffff76e9da1 "src/gc/collect.c", line=589, 
        function=0x7ffff76e9fc0 <__PRETTY_FUNCTION__.17170> "MVM_gc_collect_free_nursery_uncopied") at assert.c:101
    #4  0x00007ffff757572a in MVM_gc_collect_free_nursery_uncopied (executing_thread=0x604a60, tc=0x604a60, limit=0x7ffff6624f90) at src/gc/collect.c:589
    #5  0x00007ffff756d6a0 in finish_gc (tc=0x604a60, gen=0 '\000', is_coordinator=1 '\001') at src/gc/orchestrate.c:241
    #6  0x00007ffff756dc00 in run_gc (tc=0x604a60, what_to_do=0 '\000') at src/gc/orchestrate.c:418
    #7  0x00007ffff756e047 in MVM_gc_enter_from_allocator (tc=0x604a60) at src/gc/orchestrate.c:531
    #8  0x00007ffff756e8c3 in MVM_gc_allocate_nursery (tc=0x604a60, size=184) at src/gc/allocation.c:35
    #9  0x00007ffff756e6be in MVM_gc_allocate (tc=0x604a60, size=184) at src/gc/allocation.h:18
    #10 0x00007ffff756e94c in MVM_gc_allocate_zeroed (tc=0x604a60, size=184) at src/gc/allocation.c:52
    #11 0x00007ffff756ebb4 in MVM_gc_allocate_frame (tc=0x604a60) at src/gc/allocation.c:102
    #12 0x00007ffff7537ad4 in MVM_frame_move_to_heap (tc=0x604a60, frame=0x7ffff7fb93c8) at src/core/frame.c:634
    #13 0x00007ffff75359e1 in MVM_frame_force_to_heap (tc=0x604a60, frame=0x7ffff7fb93c8) at src/core/frame.h:213
    #14 0x00007ffff7536749 in allocate_frame (tc=0x604a60, static_frame=0x132fd00, spesh_cand=0x0, heap=1) at src/core/frame.c:250
    #15 0x00007ffff753744a in MVM_frame_invoke (tc=0x604a60, static_frame=0x132fd00, callsite=0x7ffff7c9d380 <inv_arg_callsite>, args=0x61a0c0, outer=0x369af48, code_ref=0x1573900, spesh_cand=-1)
        at src/core/frame.c:518
    #16 0x00007ffff75a80f1 in invoke_handler (tc=0x604a60, invokee=0x1573900, callsite=0x7ffff7c9d380 <inv_arg_callsite>, args=0x61a0c0) at src/6model/reprs/MVMCode.c:10
    #17 0x00007ffff7505f45 in MVM_interp_run (tc=0x604a60, initial_invoke=0x7ffff7682553 <toplevel_initial_invoke>, invoke_data=0x6a1878) at src/core/interp.c:1048
    #18 0x00007ffff76826b8 in MVM_vm_run_file (instance=0x604010, filename=0x7fffffffe233 "/home/dogbert/repos/rakudo/perl6.moarvm") at src/moar.c:444
    #19 0x00000000004016b7 in main (argc=10, argv=0x7fffffffdda8) at src/main.c:302
    (gdb)