gdb.log

$ pg6 -e 'my @matrix[2;2] = [1,2],[3,4]; @matrix[<0>;0] for ^1000000'
================================================================================================
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 2017.11.72.g.00632.edb.6 built on MoarVM version 2017.11.30.g.3.c.7.b.49.e.8.f,
running on arch (4.13.3.1.arch) / linux (4.14.3.1.ARCH)

Type `bt full` to generate a backtrace if applicable, type `q` to quit or `help` for help.
------------------------------------------------------------------------------------------------
Reading symbols from /home/dan/Source/perl6/install/bin/moar...done.
.gdbinit: running app
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7ffff6310700 (LWP 6582)]

Thread 1 "moar" received signal SIGSEGV, Segmentation fault.
0x00007ffff76f329f in MVM_spesh_stats_gc_mark (tc=0x5555557bfb40, ss=0x7ffff022e050, worklist=0x5555558d97e0) at src/spesh/stats.c:670
670                             MVMSpeshStatsType *off_types = by_offset->type_tuples[l].arg_types;
MoarVM string pretty printer registered
moar-heap registered
diff-moar-heap registered
The program being debugged has been started already.
Start it from the beginning? (y or n) n
Program not restarted.
(gdb) bt
#0  0x00007ffff76f329f in MVM_spesh_stats_gc_mark (tc=0x5555557bfb40, ss=0x7ffff022e050, worklist=0x5555558d97e0) at src/spesh/stats.c:670
#1  0x00007ffff76b6b41 in gc_mark (tc=0x5555557bfb40, st=0x55555579e380, data=0x55555836b1d8, worklist=0x5555558d97e0) at src/6model/reprs/MVMStaticFrameSpesh.c:28
#2  0x00007ffff76621e5 in MVM_gc_mark_collectable (tc=0x5555557bfb40, worklist=0x5555558d97e0, new_addr=0x55555836b1c0) at src/gc/collect.c:428
#3  0x00007ffff765f521 in MVM_gc_root_add_gen2s_to_worklist (tc=0x5555557bfb40, worklist=0x5555558d97e0) at src/gc/roots.c:302
#4  0x00007ffff7660af1 in MVM_gc_collect (tc=0x5555557bfb40, what_to_do=1 '\001', gen=0 '\000') at src/gc/collect.c:155
#5  0x00007ffff765b86e in run_gc (tc=0x555555758c40, what_to_do=0 '\000') at src/gc/orchestrate.c:369
#6  0x00007ffff765bcd9 in MVM_gc_enter_from_allocator (tc=0x555555758c40) at src/gc/orchestrate.c:486
#7  0x00007ffff765c19f in MVM_gc_allocate_nursery (tc=0x555555758c40, size=56) at src/gc/allocation.c:32
#8  0x00007ffff765c0a2 in MVM_gc_allocate (tc=0x555555758c40, size=56) at src/gc/allocation.h:13
#9  0x00007ffff765c21f in MVM_gc_allocate_zeroed (tc=0x555555758c40, size=56) at src/gc/allocation.c:49
#10 0x00007ffff42df4f1 in ?? ()
#11 0x00005555557f9d78 in ?? ()
#12 0x00000008ffffffff in ?? ()
#13 0x000055555575a120 in ?? ()
#14 0x0000555555758c40 in ?? ()
#15 0x0000555555759a70 in ?? ()
#16 0x00005555557f9d78 in ?? ()
#17 0x00007fffffffcef0 in ?? ()
#18 0x00007ffff7652593 in MVM_fixed_size_free (tc=0x555555ff0530, al=0x7fff0002309a, bytes=93825003357488, to_free=0x7fffefad4b18) at src/core/fixedsizealloc.c:305
#19 0x00007ffff773e00c in MVM_jit_enter_code (tc=0x555555758c40, cu=0x555555e04170, code=0x7ffff03a7eb0) at src/jit/compile.c:335
#20 0x00007ffff762c3a6 in MVM_interp_run (tc=0x555555758c40, initial_invoke=0x7ffff772d2bd <toplevel_initial_invoke>, invoke_data=0x5555557c1860) at src/core/interp.c:5729
#21 0x00007ffff772d422 in MVM_vm_run_file (instance=0x555555758260, filename=0x7fffffffebc9 "/home/dan/Source/perl6/install/share/perl6/runtime/perl6.moarvm") at src/moar.c:401
#22 0x00005555555557e7 in main (argc=8, argv=0x7fffffffe7e8) at src/main.c:256
(gdb) info threads
  Id   Target Id         Frame 
* 1    Thread 0x7ffff7f9b680 (LWP 6578) "moar" 0x00007ffff76f329f in MVM_spesh_stats_gc_mark (tc=0x5555557bfb40, ss=0x7ffff022e050, worklist=0x5555558d97e0) at src/spesh/stats.c:670
  2    Thread 0x7ffff6310700 (LWP 6582) "moar" 0x00007ffff6b2b38d in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0
(gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /home/dan/Source/perl6/install/bin/moar --execname=/home/dan/Source/perl6/install/bin/perl6-gdb-m --libpath=/home/dan/Source/perl6/install/share/nqp/lib --libpath=/home/dan/Source/perl6/install/share/perl6/lib --libpath=/home/dan/Source/perl6/install/share/perl6/runtime /home/dan/Source/perl6/install/share/perl6/runtime/perl6.moarvm -e my\ @matrix\[2\;2\]\ =\ \[1,2\],\[3,4\]\;\ @matrix\[\<0\>\;0\]\ for\ \^1000000
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7ffff6310700 (LWP 7431)]
*** Error in `/home/dan/Source/perl6/install/bin/moar': free(): invalid pointer: 0x00007ffff039f4f0 ***

Thread 2 "moar" received signal SIGABRT, Aborted.
[Switching to Thread 0x7ffff6310700 (LWP 7431)]
0x00007ffff70bc8a0 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007ffff70bc8a0 in raise () from /usr/lib/libc.so.6
#1  0x00007ffff70bdf09 in abort () from /usr/lib/libc.so.6
#2  0x00007ffff70ff517 in __libc_message () from /usr/lib/libc.so.6
#3  0x00007ffff7105c84 in malloc_printerr () from /usr/lib/libc.so.6
#4  0x00007ffff7107599 in _int_free () from /usr/lib/libc.so.6
#5  0x00007ffff76f0c2e in MVM_free (p=0x7ffff039f4f0) at src/core/alloc.h:40
#6  0x00007ffff76f39cd in MVM_spesh_stats_destroy (tc=0x5555557bfb40, ss=0x7ffff0227910) at src/spesh/stats.c:741
#7  0x00007ffff76f2e25 in MVM_spesh_stats_cleanup (tc=0x5555557bfb40, check_frames=0x7ffff044b1b0) at src/spesh/stats.c:641
#8  0x00007ffff76f07c7 in worker (tc=0x5555557bfb40, callsite=0x7ffff7d746a0 <null_args_callsite>, args=0x0) at src/spesh/worker.c:13
#9  0x00007ffff76873f6 in invoke_handler (tc=0x5555557bfb40, invokee=0x5555557b2820, callsite=0x7ffff7d746a0 <null_args_callsite>, args=0x0) at src/6model/reprs/MVMCFunction.c:9
#10 0x00007ffff763deff in thread_initial_invoke (tc=0x5555557bfb40, data=0x5555557c0f40) at src/core/threads.c:59
#11 0x00007ffff760033a in MVM_interp_run (tc=0x5555557bfb40, initial_invoke=0x7ffff763de74 <thread_initial_invoke>, invoke_data=0x5555557c0f40) at src/core/interp.c:93
#12 0x00007ffff763dfb3 in start_thread (data=0x5555557c0f40) at src/core/threads.c:85
#13 0x00007ffff6b2508a in start_thread () from /usr/lib/libpthread.so.0
#14 0x00007ffff717e47f in clone () from /usr/lib/libc.so.6
(gdb) info threads
  Id   Target Id         Frame 
  1    Thread 0x7ffff7f9b680 (LWP 7430) "moar" MVM_interp_run (tc=0x555555758c40, initial_invoke=0x7ffff772d2bd <toplevel_initial_invoke>, invoke_data=0x5555557c1860) at src/core/interp.c:5734
* 2    Thread 0x7ffff6310700 (LWP 7431) "moar" 0x00007ffff70bc8a0 in raise () from /usr/lib/libc.so.6
(gdb)

valgrind.log

$ pv6 -e 'my @matrix[2;2] = [1,2],[3,4]; @matrix[<0>;0] for ^1000000'
================================================================================================
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.
Valgrind options can be added with MVM_VALGRIND_OPTS environment variable.

This Rakudo version is 2017.11.72.g.00632.edb.6 built on MoarVM version 2017.11.28.gba.1.fb.9542,
running on arch (4.13.3.1.arch) / linux (4.14.3.1.ARCH)
------------------------------------------------------------------------------------------------
==32368== Memcheck, a memory error detector
==32368== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==32368== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==32368== Command: /home/dan/Source/perl6/install/bin/moar --execname=/home/dan/Source/perl6/install/bin/perl6-valgrind-m --libpath=/home/dan/Source/perl6/install/share/nqp/lib --libpath=/home/dan/Source/perl6/install/share/perl6/lib --libpath=/home/dan/Source/perl6/install/share/perl6/runtime /home/dan/Source/perl6/install/share/perl6/runtime/perl6.moarvm -e my\ @matrix[2;2]\ =\ [1,2],[3,4];\ @matrix[\<0\>;0]\ for\ ^1000000
==32368== 
==32368== Thread 2:
==32368== Invalid read of size 8
==32368==    at 0x50E9987: live_range_spill (linear_scan.c:718)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368==  Address 0xb90e920 is 144 bytes inside a block of size 1,872 free'd
==32368==    at 0x4C2F13F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50E90CC: MVM_realloc (alloc.h:20)
==32368==    by 0x50E90CC: live_range_init (linear_scan.c:141)
==32368==    by 0x50E9A74: insert_load_before_use (linear_scan.c:678)
==32368==    by 0x50E9A74: live_range_spill (linear_scan.c:734)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==  Block was alloc'd at
==32368==    at 0x4C2EF35: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50EB38A: MVM_calloc (alloc.h:11)
==32368==    by 0x50EB38A: determine_live_ranges (linear_scan.c:510)
==32368==    by 0x50EB38A: MVM_jit_linear_scan_allocate (linear_scan.c:1105)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368== 
==32368== Invalid write of size 8
==32368==    at 0x50E9894: live_range_spill (linear_scan.c:723)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368==  Address 0xb90e920 is 144 bytes inside a block of size 1,872 free'd
==32368==    at 0x4C2F13F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50E90CC: MVM_realloc (alloc.h:20)
==32368==    by 0x50E90CC: live_range_init (linear_scan.c:141)
==32368==    by 0x50E9A74: insert_load_before_use (linear_scan.c:678)
==32368==    by 0x50E9A74: live_range_spill (linear_scan.c:734)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==  Block was alloc'd at
==32368==    at 0x4C2EF35: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50EB38A: MVM_calloc (alloc.h:11)
==32368==    by 0x50EB38A: determine_live_ranges (linear_scan.c:510)
==32368==    by 0x50EB38A: MVM_jit_linear_scan_allocate (linear_scan.c:1105)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368== 
==32368== Invalid read of size 8
==32368==    at 0x50E9878: live_range_spill (linear_scan.c:718)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368==  Address 0xb90e920 is 144 bytes inside a block of size 1,872 free'd
==32368==    at 0x4C2F13F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50E90CC: MVM_realloc (alloc.h:20)
==32368==    by 0x50E90CC: live_range_init (linear_scan.c:141)
==32368==    by 0x50E9A74: insert_load_before_use (linear_scan.c:678)
==32368==    by 0x50E9A74: live_range_spill (linear_scan.c:734)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==  Block was alloc'd at
==32368==    at 0x4C2EF35: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50EB38A: MVM_calloc (alloc.h:11)
==32368==    by 0x50EB38A: determine_live_ranges (linear_scan.c:510)
==32368==    by 0x50EB38A: MVM_jit_linear_scan_allocate (linear_scan.c:1105)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368== 
==32368== Invalid write of size 4
==32368==    at 0x50E99A8: live_range_spill (linear_scan.c:750)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368==  Address 0xb90e960 is 208 bytes inside a block of size 1,872 free'd
==32368==    at 0x4C2F13F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50E90CC: MVM_realloc (alloc.h:20)
==32368==    by 0x50E90CC: live_range_init (linear_scan.c:141)
==32368==    by 0x50E9A74: insert_load_before_use (linear_scan.c:678)
==32368==    by 0x50E9A74: live_range_spill (linear_scan.c:734)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==  Block was alloc'd at
==32368==    at 0x4C2EF35: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50EB38A: MVM_calloc (alloc.h:11)
==32368==    by 0x50EB38A: determine_live_ranges (linear_scan.c:510)
==32368==    by 0x50EB38A: MVM_jit_linear_scan_allocate (linear_scan.c:1105)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368== 
==32368== Invalid write of size 4
==32368==    at 0x50E99AF: live_range_spill (linear_scan.c:751)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368==  Address 0xb90e964 is 212 bytes inside a block of size 1,872 free'd
==32368==    at 0x4C2F13F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50E90CC: MVM_realloc (alloc.h:20)
==32368==    by 0x50E90CC: live_range_init (linear_scan.c:141)
==32368==    by 0x50E9A74: insert_load_before_use (linear_scan.c:678)
==32368==    by 0x50E9A74: live_range_spill (linear_scan.c:734)
==32368==    by 0x50E9E63: prepare_arglist_and_call (linear_scan.c:819)
==32368==    by 0x50EB2C0: process_tile (linear_scan.c:1023)
==32368==    by 0x50EB2C0: linear_scan (linear_scan.c:1051)
==32368==    by 0x50EB2C0: MVM_jit_linear_scan_allocate (linear_scan.c:1106)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==  Block was alloc'd at
==32368==    at 0x4C2EF35: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==32368==    by 0x50EB38A: MVM_calloc (alloc.h:11)
==32368==    by 0x50EB38A: determine_live_ranges (linear_scan.c:510)
==32368==    by 0x50EB38A: MVM_jit_linear_scan_allocate (linear_scan.c:1105)
==32368==    by 0x50E1E14: MVM_jit_compile_expr_tree (compile.c:264)
==32368==    by 0x50E1FB1: MVM_jit_compile_graph (compile.c:82)
==32368==    by 0x5089249: MVM_spesh_candidate_add (candidate.c:96)
==32368==    by 0x5096898: worker (worker.c:13)
==32368==    by 0x501ABE0: thread_initial_invoke (threads.c:59)
==32368==    by 0x4FF76ED: MVM_interp_run (interp.c:93)
==32368==    by 0x501AC5D: start_thread (threads.c:85)
==32368==    by 0x5E61089: start_thread (in /usr/lib/libpthread-2.26.so)
==32368==    by 0x584C47E: clone (in /usr/lib/libc-2.26.so)
==32368== 
==32368== 
==32368== HEAP SUMMARY:
==32368==     in use at exit: 58,350,726 bytes in 202,926 blocks
==32368==   total heap usage: 2,284,343 allocs, 2,081,417 frees, 1,023,328,259 bytes allocated
==32368== 
==32368== LEAK SUMMARY:
==32368==    definitely lost: 30,048 bytes in 794 blocks
==32368==    indirectly lost: 0 bytes in 0 blocks
==32368==      possibly lost: 198,848 bytes in 3,550 blocks
==32368==    still reachable: 58,121,830 bytes in 198,582 blocks
==32368==         suppressed: 0 bytes in 0 blocks
==32368== Rerun with --leak-check=full to see details of leaked memory
==32368== 
==32368== For counts of detected and suppressed errors, rerun with: -v
==32368== ERROR SUMMARY: 14 errors from 5 contexts (suppressed: 0 from 0)