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core dump while profiling with a '.race' #5345

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p6rt opened this issue May 28, 2016 · 7 comments
Open

core dump while profiling with a '.race' #5345

p6rt opened this issue May 28, 2016 · 7 comments
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@p6rt
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@p6rt p6rt commented May 28, 2016

Migrated from rt.perl.org#128280 (status was 'open')

Searchable as RT128280$

@p6rt
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@p6rt p6rt commented May 28, 2016

From @MasterDuke17

./perl6 --profile --profile-filename=race1.json -e 'say
(^100000).race(batch=>1, degree=>4).map({$_}).grep(* > 12345).elems'
*** Error in `/home/dan/Source/rakudo/install/bin/moar'​: double free or
corruption (fasttop)​: 0x00007fb3e8548890 ***
Aborted (core dumped)

/perl6 --version
This is Rakudo version 2016.03-403-g4d94f68 built on MoarVM version 2016.05
implementing Perl 6.c.

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@p6rt
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@p6rt p6rt commented Jun 15, 2016

From @zoffixznet

Would you be able to retry with a more recent Rakudo and see if the issue is still there?

Also, what OS/architecture are you using?

Can't reproduce on a Debian-flavoured x64 Linux with Rakudo version 2016.05-145-gac0dcdd built on MoarVM version 2016.05-17-g6075599

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@p6rt
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@p6rt p6rt commented Jun 15, 2016

The RT System itself - Status changed from 'new' to 'open'

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@p6rt
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@p6rt p6rt commented Jun 15, 2016

From @zoffixznet

To add correspondence from OP from IRC​:

��MasterDuke�� .tell Zoffix i've tried replying to your question on RT #​128280 twice, but nothing is showing up. short answer, on arch linux and kubuntu 16.04, both x64 with an up to date rakudo, i get the same seg fault�

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@p6rt p6rt commented Jun 16, 2016

From @MasterDuke17

Also, running it ~30 times without profiling never saw a crash.

On Wed, Jun 15, 2016 at 12​:04 AM, Daniel Green <ddgreen@​gmail.com> wrote​:

Also, the Kubuntu system Rakudo was built with --gen-moar, on the Arch
Linux system MoarMV, NQP, and Rakudo were all built separately with the
same --prefix.

On Wed, Jun 15, 2016 at 12​:01 AM, Daniel Green <ddgreen@​gmail.com> wrote​:

Doesn't happen every time, seem to be about 1 in 5. Here are the results
for two different system.

This is an up-to-date Arch Linux

uname -a
Linux <hostname> 4.5.3-1-ARCH #​1 SMP PREEMPT Sat May 7 20​:43​:57 CEST 2016
x86_64 GNU/Linux

p6 --version
This is Rakudo version 2016.05-145-gac0dcdd built on MoarVM version
2016.05-34-gfbe9e24
implementing Perl 6.c.

p6 --profile --profile-filename=race1.json -e 'say
(^100000).race(batch=>1, degree=>4).map({$_}).grep(* > 12345).elems'
Segmentation fault (core dumped)

This is Kubuntu 16.04, on an Intel(R) Core(TM) i5-4200U

uname -a
Linux <hostname> 4.4.0-22-generic #​40-Ubuntu SMP Thu May 12 22​:03​:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux

./perl6 --version
This is Rakudo version 2016.05-145-gac0dcdd built on MoarVM version
2016.05-17-g6075599
implementing Perl 6.c.

./perl6 --profile --profile-filename=race1.json -e 'say
(^100000).race(batch=>1, degree=>4).map({$_}).grep(* > 12345).elems'
*** Error in `/home/dan/Source/perl6/rakudo/install/bin/moar'​: double
free or corruption (fasttop)​: 0x00007fdaa8328e90 ***
======= Backtrace​: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x77725)[0x7fdabdce5725]
/lib/x86_64-linux-gnu/libc.so.6(+0x7ff4a)[0x7fdabdcedf4a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7fdabdcf1abc]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_spesh_graph_destroy+0x5f)[0x7fdabe213f1f]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_profile_instrument+0x2e3)[0x7fdabe24fb23]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_frame_invoke+0xdc)[0x7fdabe1a2fbc]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x1ad3f3)[0x7fdabe1e43f3]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_interp_run+0x114a9)[0x7fdabe19b069]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x1749fe)[0x7fdabe1ab9fe]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x23ddf7)[0x7fdabe274df7]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76fa)[0x7fdabd74f6fa]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fdabdd74b5d]
======= Memory map​: ========
00400000-00402000 r-xp 00000000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00601000-00602000 r--p 00001000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00602000-00603000 rw-p 00002000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00cde000-057bd000 rw-p 00000000 00​:00 0
[heap]
7fdaa0000000-7fdaa0021000 rw-p 00000000 00​:00 0
7fdaa0021000-7fdaa4000000 ---p 00000000 00​:00 0
7fdaa71e7000-7fdaa71fd000 r-xp 00000000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa71fd000-7fdaa73fc000 ---p 00016000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa73fc000-7fdaa73fd000 rw-p 00015000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa73fd000-7fdaa8000000 rw-p 00000000 00​:00 0
7fdaa8000000-7fdaa8444000 rw-p 00000000 00​:00 0
7fdaa8444000-7fdaac000000 ---p 00000000 00​:00 0
7fdaac000000-7fdaac4ad000 rw-p 00000000 00​:00 0
7fdaac4ad000-7fdab0000000 ---p 00000000 00​:00 0
7fdab0000000-7fdab04da000 rw-p 00000000 00​:00 0
7fdab04da000-7fdab4000000 ---p 00000000 00​:00 0
7fdab4000000-7fdab4567000 rw-p 00000000 00​:00 0
7fdab4567000-7fdab8000000 ---p 00000000 00​:00 0
7fdab81a8000-7fdab8239000 rw-p 00000000 00​:00 0
7fdab8271000-7fdab8272000 rw-p 00000000 00​:00 0
7fdab8272000-7fdab8283000 r-xp 00000000 00​:00 0
7fdab8283000-7fdab8a85000 rw-p 00000000 00​:00 0
7fdab8a85000-7fdab8ab6000 r-xp 00000000 00​:00 0
7fdab8ab6000-7fdab8ab7000 ---p 00000000 00​:00 0
7fdab8ab7000-7fdab92b7000 rwxp 00000000 00​:00 0
7fdab92b7000-7fdab96b8000 rw-p 00000000 00​:00 0
7fdab96b8000-7fdab96b9000 ---p 00000000 00​:00 0
7fdab96b9000-7fdab9eb9000 rwxp 00000000 00​:00 0
7fdab9eb9000-7fdaba2ba000 rw-p 00000000 00​:00 0
7fdaba2ba000-7fdaba2bb000 ---p 00000000 00​:00 0
7fdaba2bb000-7fdabaabb000 rwxp 00000000 00​:00 0
7fdabaabb000-7fdabaebc000 rw-p 00000000 00​:00 0
7fdabaebc000-7fdabaebd000 ---p 00000000 00​:00 0
7fdabaebd000-7fdabb6bd000 rwxp 00000000 00​:00 0
7fdabb6bd000-7fdabbabe000 rw-p 00000000 00​:00 0
7fdabbabe000-7fdabbaf0000 r-xp 00000000 00​:00 0
7fdabbaf0000-7fdabbc4b000 rw-p 00000000 00​:00 0
7fdabbc4b000-7fdabbc92000 r--p 00000000 08​:01 6816489
/home/dan/Source/perl6/rakudo/blib/Perl6/Metamodel.moarvm
7fdabbc92000-7fdabbcbe000 r--p 00000000 08​:01 6816491
/home/dan/Source/perl6/rakudo/blib/Perl6/BOOTSTRAP.moarvm
7fdabbcbe000-7fdabbce9000 rw-p 00000000 00​:00 0
7fdabbce9000-7fdabc774000 r--p 00000000 08​:01 6684906
/home/dan/Source/perl6/rakudo/CORE.setting.moarvm
7fdabc774000-7fdabc77b000 r-xp 00000000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc77b000-7fdabc97a000 ---p 00007000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97a000-7fdabc97b000 r--p 00006000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97b000-7fdabc97c000 rw-p 00007000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97c000-7fdabc9a3000 r--p 00000000 08​:01 6816486
/home/dan/Source/perl6/rakudo/blib/Perl6/Optimizer.moarvm
7fdabc9a3000-7fdabc9a8000 r--p 00000000 08​:01 6816487
/home/dan/Source/perl6/rakudo/blib/Perl6/Compiler.moarvm
7fdabc9a8000-7fdabca29000 rw-p 00000000 00​:00 0
7fdabca29000-7fdabca75000 r--p 00000000 08​:01 6816488
/home/dan/Source/perl6/rakudo/blib/Perl6/World.moarvm
7fdabca75000-7fdabca85000 r--p 00000000 08​:01 6816482
/home/dan/Source/perl6/rakudo/blib/Perl6/Ops.moarvm
7fdabca85000-7fdabcb68000 r--p 00000000 08​:01 6816492
/home/dan/Source/perl6/rakudo/blib/Perl6/Actions.moarvm
7fdabcb68000-7fdabcba2000 r--p 00000000 08​:01 6955666
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPP5QRegex.moarvm
7fdabcba2000-7fdabcf3b000 r--p 00000000 08​:01 6816493
/home/dan/Source/perl6/rakudo/blib/Perl6/Grammar.moarvm
7fdabcf3b000-7fdabd33c000 rw-p 00000000 00​:00 0
7fdabd33c000-7fdabd33f000 r-xp 00000000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd33f000-7fdabd53e000 ---p 00003000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd53e000-7fdabd53f000 r--p 00002000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd53f000-7fdabd540000 rw-p 00003000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd540000-7fdabd547000 r-xp 00000000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd547000-7fdabd746000 ---p 00007000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd746000-7fdabd747000 r--p 00006000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd747000-7fdabd748000 rw-p 00007000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd748000-7fdabd760000 r-xp 00000000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd760000-7fdabd95f000 ---p 00018000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd95f000-7fdabd960000 r--p 00017000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd960000-7fdabd961000 rw-p 00018000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd961000-7fdabd965000 rw-p 00000000 00​:00 0
7fdabd965000-7fdabda6d000 r-xp 00000000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabda6d000-7fdabdc6c000 ---p 00108000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6c000-7fdabdc6d000 r--p 00107000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6d000-7fdabdc6e000 rw-p 00108000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6e000-7fdabde2e000 r-xp 00000000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabde2e000-7fdabe02d000 ---p 001c0000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe02d000-7fdabe031000 r--p 001bf000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe031000-7fdabe033000 rw-p 001c3000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe033000-7fdabe037000 rw-p 00000000 00​:00 0
7fdabe037000-7fdabe3f7000 r-xp 00000000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe3f7000-7fdabe5f7000 ---p 003c0000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe5f7000-7fdabe691000 r--p 003c0000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe691000-7fdabe6a3000 rw-p 0045a000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe6a3000-7fdabe6a4000 rw-p 00000000 00​:00 0
7fdabe6a4000-7fdabe6ca000 r-xp 00000000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe6ca000-7fdabe6cd000 r-xp 00000000 00​:00 0
7fdabe6cd000-7fdabe6d2000 r--p 00000000 08​:01 6816477
/home/dan/Source/perl6/rakudo/blib/Perl6/ModuleLoader.moarvm
7fdabe6d2000-7fdabe6e5000 r--p 00000000 08​:01 6816479
/home/dan/Source/perl6/rakudo/blib/Perl6/Pod.moarvm
7fdabe6e5000-7fdabe6ee000 r-xp 00000000 00​:00 0
7fdabe6ee000-7fdabe709000 r--p 00000000 08​:01 6955661
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/MASTOps.moarvm
7fdabe709000-7fdabe715000 r--p 00000000 08​:01 6955662
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/MASTNodes.moarvm
7fdabe715000-7fdabe788000 r--p 00000000 08​:01 6955663
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QAST.moarvm
7fdabe788000-7fdabe7de000 r--p 00000000 08​:01 6955660
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPHLL.moarvm
7fdabe7de000-7fdabe7f5000 r--p 00000000 08​:01 6955658
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QASTNode.moarvm
7fdabe7f5000-7fdabe819000 r--p 00000000 08​:01 6955659
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QRegex.moarvm
7fdabe819000-7fdabe87b000 r--p 00000000 08​:01 6955664
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPP6QRegex.moarvm
7fdabe87b000-7fdabe88f000 r--p 00000000 08​:01 6955655
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/nqpmo.moarvm
7fdabe88f000-7fdabe89b000 r--p 00000000 08​:01 6955657
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPCORE.setting.moarvm
7fdabe89b000-7fdabe89e000 r--p 00000000 08​:01 6955656
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/ModuleLoader.moarvm
7fdabe89e000-7fdabe8a3000 rw-p 00000000 00​:00 0
7fdabe8a3000-7fdabe8a6000 r--p 00000000 08​:01 6684731
/home/dan/Source/perl6/rakudo/perl6.moarvm
7fdabe8a6000-7fdabe8c9000 rw-p 00000000 00​:00 0
7fdabe8c9000-7fdabe8ca000 r--p 00025000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe8ca000-7fdabe8cb000 rw-p 00026000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe8cb000-7fdabe8cc000 rw-p 00000000 00​:00 0
7ffebf7bb000-7ffebf7da000 rwxp 00000000 00​:00 0
[stack]
7ffebf7da000-7ffebf7dc000 rw-p 00000000 00​:00 0
7ffebf7e3000-7ffebf7e5000 r--p 00000000 00​:00 0
[vvar]
7ffebf7e5000-7ffebf7e7000 r-xp 00000000 00​:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00​:00 0
[vsyscall]
Aborted (core dumped)

On Tue, Jun 14, 2016 at 11​:10 PM, Zoffix Znet via RT <
perl6-bugs-followup@​perl.org> wrote​:

Would you be able to retry with a more recent Rakudo and see if the
issue is still there?

Also, what OS/architecture are you using?

Can't reproduce on a Debian-flavoured x64 Linux with Rakudo version
2016.05-145-gac0dcdd built on MoarVM version 2016.05-17-g6075599

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@p6rt
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@p6rt p6rt commented Jun 16, 2016

From @MasterDuke17

Doesn't happen every time, seem to be about 1 in 5. Here are the results
for two different system.

This is an up-to-date Arch Linux

uname -a
Linux <hostname> 4.5.3-1-ARCH #​1 SMP PREEMPT Sat May 7 20​:43​:57 CEST 2016
x86_64 GNU/Linux

p6 --version
This is Rakudo version 2016.05-145-gac0dcdd built on MoarVM version
2016.05-34-gfbe9e24
implementing Perl 6.c.

p6 --profile --profile-filename=race1.json -e 'say (^100000).race(batch=>1,
degree=>4).map({$_}).grep(* > 12345).elems'
Segmentation fault (core dumped)

This is Kubuntu 16.04, on an Intel(R) Core(TM) i5-4200U

uname -a
Linux <hostname> 4.4.0-22-generic #​40-Ubuntu SMP Thu May 12 22​:03​:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux

./perl6 --version
This is Rakudo version 2016.05-145-gac0dcdd built on MoarVM version
2016.05-17-g6075599
implementing Perl 6.c.

./perl6 --profile --profile-filename=race1.json -e 'say
(^100000).race(batch=>1, degree=>4).map({$_}).grep(* > 12345).elems'
*** Error in `/home/dan/Source/perl6/rakudo/install/bin/moar'​: double free
or corruption (fasttop)​: 0x00007fdaa8328e90 ***
======= Backtrace​: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x77725)[0x7fdabdce5725]
/lib/x86_64-linux-gnu/libc.so.6(+0x7ff4a)[0x7fdabdcedf4a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7fdabdcf1abc]
//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_spesh_graph_destroy+0x5f)[0x7fdabe213f1f]
//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_profile_instrument+0x2e3)[0x7fdabe24fb23]
//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_frame_invoke+0xdc)[0x7fdabe1a2fbc]
//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x1ad3f3)[0x7fdabe1e43f3]
//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_interp_run+0x114a9)[0x7fdabe19b069]
//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x1749fe)[0x7fdabe1ab9fe]
//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x23ddf7)[0x7fdabe274df7]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76fa)[0x7fdabd74f6fa]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fdabdd74b5d]
======= Memory map​: ========
00400000-00402000 r-xp 00000000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00601000-00602000 r--p 00001000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00602000-00603000 rw-p 00002000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00cde000-057bd000 rw-p 00000000 00​:00 0
[heap]
7fdaa0000000-7fdaa0021000 rw-p 00000000 00​:00 0
7fdaa0021000-7fdaa4000000 ---p 00000000 00​:00 0
7fdaa71e7000-7fdaa71fd000 r-xp 00000000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa71fd000-7fdaa73fc000 ---p 00016000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa73fc000-7fdaa73fd000 rw-p 00015000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa73fd000-7fdaa8000000 rw-p 00000000 00​:00 0
7fdaa8000000-7fdaa8444000 rw-p 00000000 00​:00 0
7fdaa8444000-7fdaac000000 ---p 00000000 00​:00 0
7fdaac000000-7fdaac4ad000 rw-p 00000000 00​:00 0
7fdaac4ad000-7fdab0000000 ---p 00000000 00​:00 0
7fdab0000000-7fdab04da000 rw-p 00000000 00​:00 0
7fdab04da000-7fdab4000000 ---p 00000000 00​:00 0
7fdab4000000-7fdab4567000 rw-p 00000000 00​:00 0
7fdab4567000-7fdab8000000 ---p 00000000 00​:00 0
7fdab81a8000-7fdab8239000 rw-p 00000000 00​:00 0
7fdab8271000-7fdab8272000 rw-p 00000000 00​:00 0
7fdab8272000-7fdab8283000 r-xp 00000000 00​:00 0
7fdab8283000-7fdab8a85000 rw-p 00000000 00​:00 0
7fdab8a85000-7fdab8ab6000 r-xp 00000000 00​:00 0
7fdab8ab6000-7fdab8ab7000 ---p 00000000 00​:00 0
7fdab8ab7000-7fdab92b7000 rwxp 00000000 00​:00 0
7fdab92b7000-7fdab96b8000 rw-p 00000000 00​:00 0
7fdab96b8000-7fdab96b9000 ---p 00000000 00​:00 0
7fdab96b9000-7fdab9eb9000 rwxp 00000000 00​:00 0
7fdab9eb9000-7fdaba2ba000 rw-p 00000000 00​:00 0
7fdaba2ba000-7fdaba2bb000 ---p 00000000 00​:00 0
7fdaba2bb000-7fdabaabb000 rwxp 00000000 00​:00 0
7fdabaabb000-7fdabaebc000 rw-p 00000000 00​:00 0
7fdabaebc000-7fdabaebd000 ---p 00000000 00​:00 0
7fdabaebd000-7fdabb6bd000 rwxp 00000000 00​:00 0
7fdabb6bd000-7fdabbabe000 rw-p 00000000 00​:00 0
7fdabbabe000-7fdabbaf0000 r-xp 00000000 00​:00 0
7fdabbaf0000-7fdabbc4b000 rw-p 00000000 00​:00 0
7fdabbc4b000-7fdabbc92000 r--p 00000000 08​:01 6816489
/home/dan/Source/perl6/rakudo/blib/Perl6/Metamodel.moarvm
7fdabbc92000-7fdabbcbe000 r--p 00000000 08​:01 6816491
/home/dan/Source/perl6/rakudo/blib/Perl6/BOOTSTRAP.moarvm
7fdabbcbe000-7fdabbce9000 rw-p 00000000 00​:00 0
7fdabbce9000-7fdabc774000 r--p 00000000 08​:01 6684906
/home/dan/Source/perl6/rakudo/CORE.setting.moarvm
7fdabc774000-7fdabc77b000 r-xp 00000000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc77b000-7fdabc97a000 ---p 00007000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97a000-7fdabc97b000 r--p 00006000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97b000-7fdabc97c000 rw-p 00007000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97c000-7fdabc9a3000 r--p 00000000 08​:01 6816486
/home/dan/Source/perl6/rakudo/blib/Perl6/Optimizer.moarvm
7fdabc9a3000-7fdabc9a8000 r--p 00000000 08​:01 6816487
/home/dan/Source/perl6/rakudo/blib/Perl6/Compiler.moarvm
7fdabc9a8000-7fdabca29000 rw-p 00000000 00​:00 0
7fdabca29000-7fdabca75000 r--p 00000000 08​:01 6816488
/home/dan/Source/perl6/rakudo/blib/Perl6/World.moarvm
7fdabca75000-7fdabca85000 r--p 00000000 08​:01 6816482
/home/dan/Source/perl6/rakudo/blib/Perl6/Ops.moarvm
7fdabca85000-7fdabcb68000 r--p 00000000 08​:01 6816492
/home/dan/Source/perl6/rakudo/blib/Perl6/Actions.moarvm
7fdabcb68000-7fdabcba2000 r--p 00000000 08​:01 6955666
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPP5QRegex.moarvm
7fdabcba2000-7fdabcf3b000 r--p 00000000 08​:01 6816493
/home/dan/Source/perl6/rakudo/blib/Perl6/Grammar.moarvm
7fdabcf3b000-7fdabd33c000 rw-p 00000000 00​:00 0
7fdabd33c000-7fdabd33f000 r-xp 00000000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd33f000-7fdabd53e000 ---p 00003000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd53e000-7fdabd53f000 r--p 00002000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd53f000-7fdabd540000 rw-p 00003000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd540000-7fdabd547000 r-xp 00000000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd547000-7fdabd746000 ---p 00007000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd746000-7fdabd747000 r--p 00006000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd747000-7fdabd748000 rw-p 00007000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd748000-7fdabd760000 r-xp 00000000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd760000-7fdabd95f000 ---p 00018000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd95f000-7fdabd960000 r--p 00017000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd960000-7fdabd961000 rw-p 00018000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd961000-7fdabd965000 rw-p 00000000 00​:00 0
7fdabd965000-7fdabda6d000 r-xp 00000000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabda6d000-7fdabdc6c000 ---p 00108000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6c000-7fdabdc6d000 r--p 00107000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6d000-7fdabdc6e000 rw-p 00108000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6e000-7fdabde2e000 r-xp 00000000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabde2e000-7fdabe02d000 ---p 001c0000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe02d000-7fdabe031000 r--p 001bf000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe031000-7fdabe033000 rw-p 001c3000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe033000-7fdabe037000 rw-p 00000000 00​:00 0
7fdabe037000-7fdabe3f7000 r-xp 00000000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe3f7000-7fdabe5f7000 ---p 003c0000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe5f7000-7fdabe691000 r--p 003c0000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe691000-7fdabe6a3000 rw-p 0045a000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe6a3000-7fdabe6a4000 rw-p 00000000 00​:00 0
7fdabe6a4000-7fdabe6ca000 r-xp 00000000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe6ca000-7fdabe6cd000 r-xp 00000000 00​:00 0
7fdabe6cd000-7fdabe6d2000 r--p 00000000 08​:01 6816477
/home/dan/Source/perl6/rakudo/blib/Perl6/ModuleLoader.moarvm
7fdabe6d2000-7fdabe6e5000 r--p 00000000 08​:01 6816479
/home/dan/Source/perl6/rakudo/blib/Perl6/Pod.moarvm
7fdabe6e5000-7fdabe6ee000 r-xp 00000000 00​:00 0
7fdabe6ee000-7fdabe709000 r--p 00000000 08​:01 6955661
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/MASTOps.moarvm
7fdabe709000-7fdabe715000 r--p 00000000 08​:01 6955662
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/MASTNodes.moarvm
7fdabe715000-7fdabe788000 r--p 00000000 08​:01 6955663
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QAST.moarvm
7fdabe788000-7fdabe7de000 r--p 00000000 08​:01 6955660
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPHLL.moarvm
7fdabe7de000-7fdabe7f5000 r--p 00000000 08​:01 6955658
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QASTNode.moarvm
7fdabe7f5000-7fdabe819000 r--p 00000000 08​:01 6955659
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QRegex.moarvm
7fdabe819000-7fdabe87b000 r--p 00000000 08​:01 6955664
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPP6QRegex.moarvm
7fdabe87b000-7fdabe88f000 r--p 00000000 08​:01 6955655
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/nqpmo.moarvm
7fdabe88f000-7fdabe89b000 r--p 00000000 08​:01 6955657
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPCORE.setting.moarvm
7fdabe89b000-7fdabe89e000 r--p 00000000 08​:01 6955656
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/ModuleLoader.moarvm
7fdabe89e000-7fdabe8a3000 rw-p 00000000 00​:00 0
7fdabe8a3000-7fdabe8a6000 r--p 00000000 08​:01 6684731
/home/dan/Source/perl6/rakudo/perl6.moarvm
7fdabe8a6000-7fdabe8c9000 rw-p 00000000 00​:00 0
7fdabe8c9000-7fdabe8ca000 r--p 00025000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe8ca000-7fdabe8cb000 rw-p 00026000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe8cb000-7fdabe8cc000 rw-p 00000000 00​:00 0
7ffebf7bb000-7ffebf7da000 rwxp 00000000 00​:00 0
[stack]
7ffebf7da000-7ffebf7dc000 rw-p 00000000 00​:00 0
7ffebf7e3000-7ffebf7e5000 r--p 00000000 00​:00 0
[vvar]
7ffebf7e5000-7ffebf7e7000 r-xp 00000000 00​:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00​:00 0
[vsyscall]
Aborted (core dumped)

On Tue, Jun 14, 2016 at 11​:10 PM, Zoffix Znet via RT <
perl6-bugs-followup@​perl.org> wrote​:

Would you be able to retry with a more recent Rakudo and see if the issue
is still there?

Also, what OS/architecture are you using?

Can't reproduce on a Debian-flavoured x64 Linux with Rakudo version
2016.05-145-gac0dcdd built on MoarVM version 2016.05-17-g6075599

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@p6rt p6rt commented Jun 16, 2016

From @MasterDuke17

Also, the Kubuntu system Rakudo was built with --gen-moar, on the Arch
Linux system MoarMV, NQP, and Rakudo were all built separately with the
same --prefix.

On Wed, Jun 15, 2016 at 12​:01 AM, Daniel Green <ddgreen@​gmail.com> wrote​:

Doesn't happen every time, seem to be about 1 in 5. Here are the results
for two different system.

This is an up-to-date Arch Linux

uname -a
Linux <hostname> 4.5.3-1-ARCH #​1 SMP PREEMPT Sat May 7 20​:43​:57 CEST 2016
x86_64 GNU/Linux

p6 --version
This is Rakudo version 2016.05-145-gac0dcdd built on MoarVM version
2016.05-34-gfbe9e24
implementing Perl 6.c.

p6 --profile --profile-filename=race1.json -e 'say
(^100000).race(batch=>1, degree=>4).map({$_}).grep(* > 12345).elems'
Segmentation fault (core dumped)

This is Kubuntu 16.04, on an Intel(R) Core(TM) i5-4200U

uname -a
Linux <hostname> 4.4.0-22-generic #​40-Ubuntu SMP Thu May 12 22​:03​:46 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux

./perl6 --version
This is Rakudo version 2016.05-145-gac0dcdd built on MoarVM version
2016.05-17-g6075599
implementing Perl 6.c.

./perl6 --profile --profile-filename=race1.json -e 'say
(^100000).race(batch=>1, degree=>4).map({$_}).grep(* > 12345).elems'
*** Error in `/home/dan/Source/perl6/rakudo/install/bin/moar'​: double free
or corruption (fasttop)​: 0x00007fdaa8328e90 ***
======= Backtrace​: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x77725)[0x7fdabdce5725]
/lib/x86_64-linux-gnu/libc.so.6(+0x7ff4a)[0x7fdabdcedf4a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7fdabdcf1abc]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_spesh_graph_destroy+0x5f)[0x7fdabe213f1f]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_profile_instrument+0x2e3)[0x7fdabe24fb23]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_frame_invoke+0xdc)[0x7fdabe1a2fbc]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x1ad3f3)[0x7fdabe1e43f3]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(MVM_interp_run+0x114a9)[0x7fdabe19b069]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x1749fe)[0x7fdabe1ab9fe]

//home/dan/Source/perl6/rakudo/install/lib/libmoar.so(+0x23ddf7)[0x7fdabe274df7]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76fa)[0x7fdabd74f6fa]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fdabdd74b5d]
======= Memory map​: ========
00400000-00402000 r-xp 00000000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00601000-00602000 r--p 00001000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00602000-00603000 rw-p 00002000 08​:01 6954054
/home/dan/Source/perl6/rakudo/install/bin/moar
00cde000-057bd000 rw-p 00000000 00​:00 0
[heap]
7fdaa0000000-7fdaa0021000 rw-p 00000000 00​:00 0
7fdaa0021000-7fdaa4000000 ---p 00000000 00​:00 0
7fdaa71e7000-7fdaa71fd000 r-xp 00000000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa71fd000-7fdaa73fc000 ---p 00016000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa73fc000-7fdaa73fd000 rw-p 00015000 08​:01 4199293
/lib/x86_64-linux-gnu/libgcc_s.so.1
7fdaa73fd000-7fdaa8000000 rw-p 00000000 00​:00 0
7fdaa8000000-7fdaa8444000 rw-p 00000000 00​:00 0
7fdaa8444000-7fdaac000000 ---p 00000000 00​:00 0
7fdaac000000-7fdaac4ad000 rw-p 00000000 00​:00 0
7fdaac4ad000-7fdab0000000 ---p 00000000 00​:00 0
7fdab0000000-7fdab04da000 rw-p 00000000 00​:00 0
7fdab04da000-7fdab4000000 ---p 00000000 00​:00 0
7fdab4000000-7fdab4567000 rw-p 00000000 00​:00 0
7fdab4567000-7fdab8000000 ---p 00000000 00​:00 0
7fdab81a8000-7fdab8239000 rw-p 00000000 00​:00 0
7fdab8271000-7fdab8272000 rw-p 00000000 00​:00 0
7fdab8272000-7fdab8283000 r-xp 00000000 00​:00 0
7fdab8283000-7fdab8a85000 rw-p 00000000 00​:00 0
7fdab8a85000-7fdab8ab6000 r-xp 00000000 00​:00 0
7fdab8ab6000-7fdab8ab7000 ---p 00000000 00​:00 0
7fdab8ab7000-7fdab92b7000 rwxp 00000000 00​:00 0
7fdab92b7000-7fdab96b8000 rw-p 00000000 00​:00 0
7fdab96b8000-7fdab96b9000 ---p 00000000 00​:00 0
7fdab96b9000-7fdab9eb9000 rwxp 00000000 00​:00 0
7fdab9eb9000-7fdaba2ba000 rw-p 00000000 00​:00 0
7fdaba2ba000-7fdaba2bb000 ---p 00000000 00​:00 0
7fdaba2bb000-7fdabaabb000 rwxp 00000000 00​:00 0
7fdabaabb000-7fdabaebc000 rw-p 00000000 00​:00 0
7fdabaebc000-7fdabaebd000 ---p 00000000 00​:00 0
7fdabaebd000-7fdabb6bd000 rwxp 00000000 00​:00 0
7fdabb6bd000-7fdabbabe000 rw-p 00000000 00​:00 0
7fdabbabe000-7fdabbaf0000 r-xp 00000000 00​:00 0
7fdabbaf0000-7fdabbc4b000 rw-p 00000000 00​:00 0
7fdabbc4b000-7fdabbc92000 r--p 00000000 08​:01 6816489
/home/dan/Source/perl6/rakudo/blib/Perl6/Metamodel.moarvm
7fdabbc92000-7fdabbcbe000 r--p 00000000 08​:01 6816491
/home/dan/Source/perl6/rakudo/blib/Perl6/BOOTSTRAP.moarvm
7fdabbcbe000-7fdabbce9000 rw-p 00000000 00​:00 0
7fdabbce9000-7fdabc774000 r--p 00000000 08​:01 6684906
/home/dan/Source/perl6/rakudo/CORE.setting.moarvm
7fdabc774000-7fdabc77b000 r-xp 00000000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc77b000-7fdabc97a000 ---p 00007000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97a000-7fdabc97b000 r--p 00006000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97b000-7fdabc97c000 rw-p 00007000 08​:01 6816481
/home/dan/Source/perl6/rakudo/dynext/libperl6_ops_moar.so
7fdabc97c000-7fdabc9a3000 r--p 00000000 08​:01 6816486
/home/dan/Source/perl6/rakudo/blib/Perl6/Optimizer.moarvm
7fdabc9a3000-7fdabc9a8000 r--p 00000000 08​:01 6816487
/home/dan/Source/perl6/rakudo/blib/Perl6/Compiler.moarvm
7fdabc9a8000-7fdabca29000 rw-p 00000000 00​:00 0
7fdabca29000-7fdabca75000 r--p 00000000 08​:01 6816488
/home/dan/Source/perl6/rakudo/blib/Perl6/World.moarvm
7fdabca75000-7fdabca85000 r--p 00000000 08​:01 6816482
/home/dan/Source/perl6/rakudo/blib/Perl6/Ops.moarvm
7fdabca85000-7fdabcb68000 r--p 00000000 08​:01 6816492
/home/dan/Source/perl6/rakudo/blib/Perl6/Actions.moarvm
7fdabcb68000-7fdabcba2000 r--p 00000000 08​:01 6955666
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPP5QRegex.moarvm
7fdabcba2000-7fdabcf3b000 r--p 00000000 08​:01 6816493
/home/dan/Source/perl6/rakudo/blib/Perl6/Grammar.moarvm
7fdabcf3b000-7fdabd33c000 rw-p 00000000 00​:00 0
7fdabd33c000-7fdabd33f000 r-xp 00000000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd33f000-7fdabd53e000 ---p 00003000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd53e000-7fdabd53f000 r--p 00002000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd53f000-7fdabd540000 rw-p 00003000 08​:01 4202751
/lib/x86_64-linux-gnu/libdl-2.23.so
7fdabd540000-7fdabd547000 r-xp 00000000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd547000-7fdabd746000 ---p 00007000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd746000-7fdabd747000 r--p 00006000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd747000-7fdabd748000 rw-p 00007000 08​:01 4202717
/lib/x86_64-linux-gnu/librt-2.23.so
7fdabd748000-7fdabd760000 r-xp 00000000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd760000-7fdabd95f000 ---p 00018000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd95f000-7fdabd960000 r--p 00017000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd960000-7fdabd961000 rw-p 00018000 08​:01 4202746
/lib/x86_64-linux-gnu/libpthread-2.23.so
7fdabd961000-7fdabd965000 rw-p 00000000 00​:00 0
7fdabd965000-7fdabda6d000 r-xp 00000000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabda6d000-7fdabdc6c000 ---p 00108000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6c000-7fdabdc6d000 r--p 00107000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6d000-7fdabdc6e000 rw-p 00108000 08​:01 4202711
/lib/x86_64-linux-gnu/libm-2.23.so
7fdabdc6e000-7fdabde2e000 r-xp 00000000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabde2e000-7fdabe02d000 ---p 001c0000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe02d000-7fdabe031000 r--p 001bf000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe031000-7fdabe033000 rw-p 001c3000 08​:01 4202749
/lib/x86_64-linux-gnu/libc-2.23.so
7fdabe033000-7fdabe037000 rw-p 00000000 00​:00 0
7fdabe037000-7fdabe3f7000 r-xp 00000000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe3f7000-7fdabe5f7000 ---p 003c0000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe5f7000-7fdabe691000 r--p 003c0000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe691000-7fdabe6a3000 rw-p 0045a000 08​:01 6954056
/home/dan/Source/perl6/rakudo/install/lib/libmoar.so
7fdabe6a3000-7fdabe6a4000 rw-p 00000000 00​:00 0
7fdabe6a4000-7fdabe6ca000 r-xp 00000000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe6ca000-7fdabe6cd000 r-xp 00000000 00​:00 0
7fdabe6cd000-7fdabe6d2000 r--p 00000000 08​:01 6816477
/home/dan/Source/perl6/rakudo/blib/Perl6/ModuleLoader.moarvm
7fdabe6d2000-7fdabe6e5000 r--p 00000000 08​:01 6816479
/home/dan/Source/perl6/rakudo/blib/Perl6/Pod.moarvm
7fdabe6e5000-7fdabe6ee000 r-xp 00000000 00​:00 0
7fdabe6ee000-7fdabe709000 r--p 00000000 08​:01 6955661
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/MASTOps.moarvm
7fdabe709000-7fdabe715000 r--p 00000000 08​:01 6955662
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/MASTNodes.moarvm
7fdabe715000-7fdabe788000 r--p 00000000 08​:01 6955663
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QAST.moarvm
7fdabe788000-7fdabe7de000 r--p 00000000 08​:01 6955660
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPHLL.moarvm
7fdabe7de000-7fdabe7f5000 r--p 00000000 08​:01 6955658
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QASTNode.moarvm
7fdabe7f5000-7fdabe819000 r--p 00000000 08​:01 6955659
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/QRegex.moarvm
7fdabe819000-7fdabe87b000 r--p 00000000 08​:01 6955664
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPP6QRegex.moarvm
7fdabe87b000-7fdabe88f000 r--p 00000000 08​:01 6955655
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/nqpmo.moarvm
7fdabe88f000-7fdabe89b000 r--p 00000000 08​:01 6955657
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/NQPCORE.setting.moarvm
7fdabe89b000-7fdabe89e000 r--p 00000000 08​:01 6955656
/home/dan/Source/perl6/rakudo/install/share/nqp/lib/ModuleLoader.moarvm
7fdabe89e000-7fdabe8a3000 rw-p 00000000 00​:00 0
7fdabe8a3000-7fdabe8a6000 r--p 00000000 08​:01 6684731
/home/dan/Source/perl6/rakudo/perl6.moarvm
7fdabe8a6000-7fdabe8c9000 rw-p 00000000 00​:00 0
7fdabe8c9000-7fdabe8ca000 r--p 00025000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe8ca000-7fdabe8cb000 rw-p 00026000 08​:01 4202730
/lib/x86_64-linux-gnu/ld-2.23.so
7fdabe8cb000-7fdabe8cc000 rw-p 00000000 00​:00 0
7ffebf7bb000-7ffebf7da000 rwxp 00000000 00​:00 0
[stack]
7ffebf7da000-7ffebf7dc000 rw-p 00000000 00​:00 0
7ffebf7e3000-7ffebf7e5000 r--p 00000000 00​:00 0
[vvar]
7ffebf7e5000-7ffebf7e7000 r-xp 00000000 00​:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00​:00 0
[vsyscall]
Aborted (core dumped)

On Tue, Jun 14, 2016 at 11​:10 PM, Zoffix Znet via RT <
perl6-bugs-followup@​perl.org> wrote​:

Would you be able to retry with a more recent Rakudo and see if the issue
is still there?

Also, what OS/architecture are you using?

Can't reproduce on a Debian-flavoured x64 Linux with Rakudo version
2016.05-145-gac0dcdd built on MoarVM version 2016.05-17-g6075599

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@p6rt p6rt added the SEGV label Jan 5, 2020
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