gistfile1.txt

dogbert@dogbert-VirtualBox ~/repos/rakudo $ ./perl6-valgrind-m ~/test.pl6 
================================================================================================
This is Rakudo Perl 6 running in valgrind, a tool for debugging and profiling programs.
Running a program in valgrind usually takes *a lot* more time than running it directly,
so please be patient.
This Rakudo version is 2016.11.161.g.08.ccbbbd.7 built on MoarVM version 2016.11.41.gd.2139.b.52,
running on ubuntu (14.04.3.LTS.Trusty.Tahr) / linux (3.19.0.32.generic)
------------------------------------------------------------------------------------------------
==15968== Memcheck, a memory error detector
==15968== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==15968== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==15968== Command: /home/dogbert/repos/rakudo/install/bin/moar --full-cleanup --execname=./perl6-valgrind-m --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=/home/dogbert/repos/rakudo/install/share/nqp/lib --libpath=. /home/dogbert/repos/rakudo/perl6.moarvm --nqp-lib=blib /home/dogbert/test.pl6
==15968== 
==15968== Invalid write of size 4
==15968==    at 0x403087D: memset (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x40EC981: allocate_frame (frame.c:218)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4a70 is 0 bytes after a block of size 131,072 alloc'd
==15968==    at 0x402A17C: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x40F1D76: MVM_malloc (alloc.h:2)
==15968==    by 0x40F1DC8: create_region (callstack.c:6)
==15968==    by 0x40F1E3A: MVM_callstack_region_next (callstack.c:24)
==15968==    by 0x40EC948: allocate_frame (frame.c:215)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968== 
==15968== Invalid write of size 4
==15968==    at 0x40ECA55: allocate_frame (frame.c:236)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4a74 is 4 bytes after a block of size 131,072 alloc'd
==15968==    at 0x402A17C: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x40F1D76: MVM_malloc (alloc.h:2)
==15968==    by 0x40F1DC8: create_region (callstack.c:6)
==15968==    by 0x40F1E3A: MVM_callstack_region_next (callstack.c:24)
==15968==    by 0x40EC948: allocate_frame (frame.c:215)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968== 
==15968== Invalid read of size 4
==15968==    at 0x40ECA6E: allocate_frame (frame.c:237)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4a74 is 4 bytes after a block of size 131,072 alloc'd
==15968==    at 0x402A17C: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x40F1D76: MVM_malloc (alloc.h:2)
==15968==    by 0x40F1DC8: create_region (callstack.c:6)
==15968==    by 0x40F1E3A: MVM_callstack_region_next (callstack.c:24)
==15968==    by 0x40EC948: allocate_frame (frame.c:215)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968== 
==15968== Invalid write of size 2
==15968==    at 0x40ECA89: allocate_frame (frame.c:240)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4aea is 6 bytes before a block of size 12 free'd
==15968==    at 0x402B3D8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x415B486: MVM_free (alloc.h:29)
==15968==    by 0x415B798: late_bound_find_method_return (6model.c:67)
==15968==    by 0x40EE12D: remove_one_frame (frame.c:842)
==15968==    by 0x40EE3A2: MVM_frame_try_return (frame.c:906)
==15968==    by 0x40C4274: MVM_interp_run (interp.c:462)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968== 
==15968== Invalid read of size 4
==15968==    at 0x40ECA93: allocate_frame (frame.c:243)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4a74 is 4 bytes after a block of size 131,072 alloc'd
==15968==    at 0x402A17C: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x40F1D76: MVM_malloc (alloc.h:2)
==15968==    by 0x40F1DC8: create_region (callstack.c:6)
==15968==    by 0x40F1E3A: MVM_callstack_region_next (callstack.c:24)
==15968==    by 0x40EC948: allocate_frame (frame.c:215)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968== 
==15968== Invalid write of size 4
==15968==    at 0x40ECAB9: allocate_frame (frame.c:243)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4a78 is 8 bytes after a block of size 131,072 alloc'd
==15968==    at 0x402A17C: malloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x40F1D76: MVM_malloc (alloc.h:2)
==15968==    by 0x40F1DC8: create_region (callstack.c:6)
==15968==    by 0x40F1E3A: MVM_callstack_region_next (callstack.c:24)
==15968==    by 0x40EC948: allocate_frame (frame.c:215)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968== 
==15968== Invalid write of size 4
==15968==    at 0x40ECAD4: allocate_frame (frame.c:249)
==15968==    by 0x40ED848: MVM_frame_invoke (frame.c:556)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4af4 is 4 bytes inside a block of size 12 free'd
==15968==    at 0x402B3D8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x415B486: MVM_free (alloc.h:29)
==15968==    by 0x415B798: late_bound_find_method_return (6model.c:67)
==15968==    by 0x40EE12D: remove_one_frame (frame.c:842)
==15968==    by 0x40EE3A2: MVM_frame_try_return (frame.c:906)
==15968==    by 0x40C4274: MVM_interp_run (interp.c:462)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968== 
==15968== Invalid write of size 4
==15968==    at 0x40ED87C: MVM_frame_invoke (frame.c:563)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4aa8 is 8 bytes inside a block of size 32 free'd
==15968==    at 0x402B3D8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x412E4A6: MVM_free (alloc.h:29)
==15968==    by 0x412E91F: gc_free (MVMArray.c:81)
==15968==    by 0x41131E9: MVM_gc_collect_free_nursery_uncopied (collect.c:580)
==15968==    by 0x410DC62: run_gc (orchestrate.c:342)
==15968==    by 0x410E000: MVM_gc_enter_from_allocator (orchestrate.c:452)
==15968==    by 0x410E31D: MVM_gc_allocate_nursery (allocation.c:32)
==15968==    by 0x410E232: MVM_gc_allocate (allocation.h:13)
==15968==    by 0x410E381: MVM_gc_allocate_zeroed (allocation.c:49)
==15968==    by 0x410E52B: MVM_gc_allocate_object (allocation.c:86)
==15968==    by 0x413514F: allocate (P6opaque.c:60)
==15968==    by 0x4128C2E: MVM_repr_alloc_init (reprconv.c:13)
==15968== 
==15968== Invalid write of size 4
==15968==    at 0x40ED88B: MVM_frame_invoke (frame.c:564)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)
==15968==  Address 0x99a4aac is 12 bytes inside a block of size 32 free'd
==15968==    at 0x402B3D8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==15968==    by 0x412E4A6: MVM_free (alloc.h:29)
==15968==    by 0x412E91F: gc_free (MVMArray.c:81)
==15968==    by 0x41131E9: MVM_gc_collect_free_nursery_uncopied (collect.c:580)
==15968==    by 0x410DC62: run_gc (orchestrate.c:342)
==15968==    by 0x410E000: MVM_gc_enter_from_allocator (orchestrate.c:452)
==15968==    by 0x410E31D: MVM_gc_allocate_nursery (allocation.c:32)
==15968==    by 0x410E232: MVM_gc_allocate (allocation.h:13)
==15968==    by 0x410E381: MVM_gc_allocate_zeroed (allocation.c:49)
==15968==    by 0x410E52B: MVM_gc_allocate_object (allocation.c:86)
==15968==    by 0x413514F: allocate (P6opaque.c:60)
==15968==    by 0x4128C2E: MVM_repr_alloc_init (reprconv.c:13)
==15968== 

valgrind: m_mallocfree.c:304 (get_bszB_as_is): Assertion 'bszB_lo == bszB_hi' failed.
valgrind: Heap block lo/hi size mismatch: lo = 131120, hi = 0.
This is probably caused by your program erroneously writing past the
end of a heap block and corrupting heap metadata.  If you fix any
invalid writes reported by Memcheck, this assertion failure will
probably go away.  Please try that before reporting this as a bug.


host stacktrace:
==15968==    at 0x3805A504: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x3805A656: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x3805A7B9: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x38068EF2: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x380533A6: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x380502DF: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x38051CD7: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x38056101: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x38050F4D: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x380002C3: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x38032ED0: ??? (in /usr/lib/valgrind/memcheck-x86-linux)
==15968==    by 0x62D721CB: ???
sched status:
  running_tid=1

Thread 1: status = VgTs_Runnable
==15968==    at 0x40ED8A3: MVM_frame_invoke (frame.c:571)
==15968==    by 0x413AF2F: invoke_handler (MVMCode.c:10)
==15968==    by 0x40C7C25: MVM_interp_run (interp.c:925)
==15968==    by 0x41BCD75: MVM_vm_run_file (moar.c:309)
==15968==    by 0x8048EA5: main (main.c:192)


Note: see also the FAQ in the source distribution.
It contains workarounds to several common problems.
In particular, if Valgrind aborted or crashed after
identifying problems in your program, there's a good chance
that fixing those problems will prevent Valgrind aborting or
crashing, especially if it happened in m_mallocfree.c.

If that doesn't help, please report this bug to: www.valgrind.org

In the bug report, send all the above text, the valgrind
version, and what OS and version you are using.  Thanks.