promise-start.gdb.log

[dan@alexandria rakudo]$ ./rakudo-m -I lib/ p-t.raku 
ok 1 - await rethrows exceptions
ok 2 - await rethrows failures
ok 3 - Get a fresh $/ inside of a start block
ok 4 - Get a fresh $/ inside of a start thunk
ok 5 - No wrong answers due to over-sharing of $/
ok 6 - Get a fresh $! inside of a start block
ok 7 - Get a fresh $! inside of a start thunk
ok 8 - dynamic variables don't disappear in call inside start nested inside block
ok 9 - dynamic variables modified inside start nested inside a block
Segmentation fault (core dumped)
[dan@alexandria rakudo]$ coredumpctl debug
           PID: 261585 (moar)
           UID: 1000 (dan)
           GID: 100 (users)
        Signal: 11 (SEGV)
     Timestamp: Thu 2021-08-19 07:41:34 EDT (57s ago)
  Command Line: /home/dan/Source/perl6/install/bin/moar --execname=/home/dan/Source/perl6/rakudo/rakudo-m --libpath=/home/dan/Source/perl6/rakudo --libpath=/home/dan/Source/perl6/rakudo/blib --libpath=/home/dan/Source/perl6/install/share/nqp/lib /home/dan/Source/perl6/rakudo/rakudo.moarvm -I lib/ p-t.raku
    Executable: /home/dan/Source/perl6/install/bin/moar
 Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-org.kde.yakuake-4bfcef90d0004bf68dab839c37cb91f9.scope
          Unit: user@1000.service
     User Unit: app-org.kde.yakuake-4bfcef90d0004bf68dab839c37cb91f9.scope
         Slice: user-1000.slice
     Owner UID: 1000 (dan)
       Boot ID: 7e9c3da1e5d94028bcb506fc3f8230d1
    Machine ID: 30686bbe4d464a1a82a55c49d07cc072
      Hostname: alexandria
       Storage: /var/lib/systemd/coredump/core.moar.1000.7e9c3da1e5d94028bcb506fc3f8230d1.261585.1629373294000000.zst (present)
     Disk Size: 9.6M
       Message: Process 261585 (moar) of user 1000 dumped core.
                
                Found module /home/dan/Source/perl6/install/bin/moar with build-id: acfee59f125fc02aa5f359ce5b28b4e524a28a75
                Found module /home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so with build-id: 8ad23637efba365c86c6a91f96ca04603fe396ca
                Found module linux-vdso.so.1 with build-id: fa04157c0239ac957b301149a561bbbbc3880c6a
                Found module ld-linux-x86-64.so.2 with build-id: 040cc3dd10461562f177df39e3be2f3704258c3c
                Found module libzstd.so.1 with build-id: 4b10444c1560ebc574af4d5f488b7408b22d450e
                Found module libdl.so.2 with build-id: 5abc547e7b0949f89f3c0e21ab0c8331a7440a8a
                Found module librt.so.1 with build-id: 75484da2d6f1515189eefa076e0a40328834cd16
                Found module libpthread.so.0 with build-id: 07c8f95b4f3251d08550217ad8a1f31066229996
                Found module libm.so.6 with build-id: 2b8fd1f869ecab4e0b55e92f2f151897f6818acf
                Found module libc.so.6 with build-id: 4b406737057708c0e4c642345a703c47a61c73dc
                Stack trace of thread 261592:
                #0  0x00007f00572ade95 n/a (n/a + 0x0)

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Reading symbols from /home/dan/Source/perl6/install/bin/moar...
[New LWP 261592]
[New LWP 261594]
[New LWP 261586]
[New LWP 261585]
[New LWP 261589]
[New LWP 261590]
[New LWP 261588]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `/home/dan/Source/perl6/install/bin/moar --execname=/home/dan/Source/perl6/rakud'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  hash_insert_internal (key=0x7f0038109a88, control=0x558ae513a5e8, tc=0x558adf2675d0) at src/strings/ops.h:48
48          return s->body.num_graphs;
[Current thread is 1 (Thread 0x7f004d29f640 (LWP 261592))]
(gdb) bt
#0  hash_insert_internal (key=0x7f0038109a88, control=0x558ae513a5e8, tc=0x558adf2675d0) at src/strings/ops.h:48
#1  MVM_str_hash_lvalue_fetch_nocheck (tc=tc@entry=0x558adf2675d0, hashtable=hashtable@entry=0x558ae149c8e8, key=key@entry=0x7f0038109a88) at src/core/str_hash_table.c:500
#2  0x00007f00572fe577 in MVMHash_bind_key (tc=0x558adf2675d0, st=<optimized out>, root=0x558ae149c8d0, data=0x558ae149c8e8, key_obj=0x7f0038109a88, value=..., kind=8) at src/6model/reprs/MVMHash.c:118
#3  0x00007f005729bc7b in MVM_interp_run (tc=0x7f0038109a88, tc@entry=0x558adf2675d0, initial_invoke=0x10, initial_invoke@entry=0x7f00572bf600 <thread_initial_invoke>, invoke_data=0x10, 
    invoke_data@entry=0x7f00572bf600 <thread_initial_invoke>, outer_runloop=0xe, outer_runloop@entry=0x0) at src/core/interp.c:2553
#4  0x00007f00572bf6d9 in start_thread (data=0x558adf3a9ad0) at src/core/threads.c:91
#5  0x00007f0056d2d259 in start_thread () from /usr/lib/libpthread.so.0
#6  0x00007f0056f875e3 in clone () from /usr/lib/libc.so.6
(gdb)

rakudo_backtrace.log

MoarVM oops: MVM_str_hash_lvalue_fetch_nocheck called concurrently on the same hash
   at gen/moar/Metamodel.nqp:2706  (/home/dan/Source/perl6/rakudo/blib/Perl6/Metamodel.moarvm:!rebuild_table)
 from gen/moar/Metamodel.nqp:2714  (/home/dan/Source/perl6/rakudo/blib/Perl6/Metamodel.moarvm:concretization_lookup)
 from gen/moar/Metamodel.nqp:2754  (/home/dan/Source/perl6/rakudo/blib/Perl6/Metamodel.moarvm:concretization)
 from gen/moar/Metamodel.nqp:1540  (/home/dan/Source/perl6/rakudo/blib/Perl6/Metamodel.moarvm:find_method_qualified)
 from gen/moar/BOOTSTRAP/v6c.nqp:4120  (/home/dan/Source/perl6/rakudo/blib/Perl6/BOOTSTRAP/v6c.moarvm:)
 from SETTING::src/core.c/Match.pm6:32  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:Str)
 from SETTING::src/core.c/Mu.pm6:667  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:Stringy)
 from SETTING::src/core.c/Mu.pm6:662  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:Stringy)
 from SETTING::src/core.c/Stringy.pm6:13  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:prefix:<~>)
 from SETTING::src/core.c/Stringy.pm6:12  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:prefix:<~>)
 from p-t.raku:19  (<ephemeral file>:)
 from p-t.raku:19  (<ephemeral file>:TOP)
 from SETTING::src/core.c/Grammar.pm6:9  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:parse)
 from p-t.raku:29  (<ephemeral file>:)
 from SETTING::src/core.c/Promise.pm6:263  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:)
 from SETTING::src/core.c/ThreadPoolScheduler.pm6:883  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:)
 from SETTING::src/core.c/ThreadPoolScheduler.pm6:251  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:)
 from SETTING::src/core.c/ThreadPoolScheduler.pm6:245  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:)
 from SETTING::src/core.c/ThreadPoolScheduler.pm6:242  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:run-one)
 from SETTING::src/core.c/ThreadPoolScheduler.pm6:284  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:)
 from SETTING::src/core.c/Thread.pm6:54  (/home/dan/Source/perl6/rakudo/blib/CORE.c.setting.moarvm:THREAD-ENTRY)