SEGV when profiling htmlify.p6

gistfile1.txt

================================================================================================
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 2017.03.219.gb.6838.ee.4.d built on MoarVM version 2017.03.127.g.66.dd.8.c.93,
running on arch (4.9.3.1.arch) / linux (4.10.6.1.ARCH)
------------------------------------------------------------------------------------------------
==27033== Memcheck, a memory error detector
==27033== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==27033== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info
==27033== Command: /home/dan/Source/perl6/install/bin/moar --full-cleanup --execname=../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 --profile --profile-filename=h1.json -I ../modules/Pod-To-HTML/lib/,../modules/oo-monitors/lib/ htmlify.p6 --no-highlight --sparse=50 --parallel=1
==27033== 
Initializing ...
Creating html/subdirectories ...
Reading type graph ...
==27033== Invalid write of size 1
==27033==    at 0x1537AD99: ???
==27033==    by 0x5047D88: MVM_jit_enter_code (compile.c:139)
==27033==    by 0x4FB2042: MVM_interp_run (interp.c:5560)
==27033==    by 0x5073DD8: MVM_vm_run_file (moar.c:323)
==27033==    by 0x400F02: main (main.c:213)
==27033==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==27033== 
==27033== 
==27033== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==27033==  Access not within mapped region at address 0x0
==27033==    at 0x1537AD99: ???
==27033==    by 0x5047D88: MVM_jit_enter_code (compile.c:139)
==27033==    by 0x4FB2042: MVM_interp_run (interp.c:5560)
==27033==    by 0x5073DD8: MVM_vm_run_file (moar.c:323)
==27033==    by 0x400F02: main (main.c:213)
==27033==  If you believe this happened as a result of a stack
==27033==  overflow in your program's main thread (unlikely but
==27033==  possible), you can try to increase the size of the
==27033==  main thread stack using the --main-stacksize= flag.
==27033==  The main thread stack size used in this run was 8388608.
==27033== 
==27033== HEAP SUMMARY:
==27033==     in use at exit: 148,634,443 bytes in 611,874 blocks
==27033==   total heap usage: 1,540,154 allocs, 928,280 frees, 506,754,614 bytes allocated
==27033== 
==27033== LEAK SUMMARY:
==27033==    definitely lost: 118,336 bytes in 486 blocks
==27033==    indirectly lost: 1,907,906 bytes in 2,358 blocks
==27033==      possibly lost: 2,307,912 bytes in 7,773 blocks
==27033==    still reachable: 144,300,289 bytes in 601,257 blocks
==27033==                       of which reachable via heuristic:
==27033==                         newarray           : 48 bytes in 1 blocks
==27033==         suppressed: 0 bytes in 0 blocks
==27033== Rerun with --leak-check=full to see details of leaked memory
==27033== 
==27033== For counts of detected and suppressed errors, rerun with: -v
==27033== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
../install/bin/perl6-valgrind-m: line 11: 27033 Segmentation fault      (core dumped) valgrind /home/dan/Source/perl6/install/bin/moar --full-cleanup --execname="$0" --libpath="/home/dan/Source/perl6/install/share/nqp/lib" --libpath="/home/dan/Source/perl6/install/share/perl6/lib" --libpath="/home/dan/Source/perl6/install/share/perl6/runtime" /home/dan/Source/perl6/install/share/perl6/runtime/perl6.moarvm "$@"