Valgrind complains on my 32 bit system

gistfile1.txt

dogbert@dogbert-VirtualBox ~/repos/rakudo $ cat test.pl6
say 'Hello World';

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 2016.11.76.g.8774.f.24 built on MoarVM version 2016.11.20.g.0.f.7277.a,
running on ubuntu (14.04.3.LTS.Trusty.Tahr) / linux (3.19.0.32.generic)
------------------------------------------------------------------------------------------------
==6431== Memcheck, a memory error detector
==6431== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==6431== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==6431== 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/perl6.moarvm test.pl6
==6431== 
==6431== Invalid free() / delete / delete[] / realloc()
==6431==    at 0x41060AD: MVM_fixed_size_free_at_safepoint (fixedsizealloc.c:286)
==6431==    by 0x41983DE: twiddle_trie_node (nfg.c:132)
==6431==    by 0x4198427: add_synthetic_to_trie (nfg.c:138)
==6431==    by 0x4198604: add_synthetic (nfg.c:188)
==6431==    by 0x419869A: lookup_or_add_synthetic (nfg.c:202)
==6431==    by 0x41986F1: MVM_nfg_codes_to_grapheme (nfg.c:217)
==6431==    by 0x41AD211: grapheme_composition (normalize.c:558)
==6431==    by 0x41AD5B9: MVM_unicode_normalizer_process_codepoint_full (normalize.c:661)
==6431==    by 0x41952A4: MVM_unicode_normalizer_process_codepoint (normalize.h:111)
==6431==    by 0x41952D0: MVM_unicode_normalizer_process_codepoint_to_grapheme (normalize.h:119)
==6431==    by 0x4195BAF: MVM_string_utf8_decode (utf8.c:200)
==6431==    by 0x40E891A: MVM_cu_obtain_string (compunit.c:227)
==6431==  Address 0x46890c4 is 0 bytes inside a block of size 16 client-defined
==6431==    at 0x4105C0D: alloc_slow_path (fixedsizealloc.c:131)
==6431==    by 0x4105D98: MVM_fixed_size_alloc (fixedsizealloc.c:181)
==6431==    by 0x41980D0: twiddle_trie_node (nfg.c:46)
==6431==    by 0x4198427: add_synthetic_to_trie (nfg.c:138)
==6431==    by 0x4198604: add_synthetic (nfg.c:188)
==6431==    by 0x419869A: lookup_or_add_synthetic (nfg.c:202)
==6431==    by 0x419875F: MVM_nfg_crlf_grapheme (nfg.c:232)
==6431==    by 0x419414F: MVM_string_decode_stream_sep_default (decode_stream.c:522)
==6431==    by 0x411A614: MVM_io_syncstream_from_uvstream (syncstream.c:347)
==6431==    by 0x411C9BD: MVM_file_get_stdstream (fileops.c:357)
==6431==    by 0x41BC68F: setup_std_handles (moar.c:270)
==6431==    by 0x41BC644: MVM_vm_create_instance (moar.c:260)
==6431== 
==6431== Invalid free() / delete / delete[] / realloc()
==6431==    at 0x41060AD: MVM_fixed_size_free_at_safepoint (fixedsizealloc.c:286)
==6431==    by 0x41983DE: twiddle_trie_node (nfg.c:132)
==6431==    by 0x4198142: twiddle_trie_node (nfg.c:52)
==6431==    by 0x4198427: add_synthetic_to_trie (nfg.c:138)
==6431==    by 0x4198604: add_synthetic (nfg.c:188)
==6431==    by 0x419869A: lookup_or_add_synthetic (nfg.c:202)
==6431==    by 0x41986F1: MVM_nfg_codes_to_grapheme (nfg.c:217)
==6431==    by 0x41AD211: grapheme_composition (normalize.c:558)
==6431==    by 0x41AD5B9: MVM_unicode_normalizer_process_codepoint_full (normalize.c:661)
==6431==    by 0x41952A4: MVM_unicode_normalizer_process_codepoint (normalize.h:111)
==6431==    by 0x41952D0: MVM_unicode_normalizer_process_codepoint_to_grapheme (normalize.h:119)
==6431==    by 0x4195BAF: MVM_string_utf8_decode (utf8.c:200)
==6431==  Address 0x88fff04 is 0 bytes inside a block of size 16 client-defined
==6431==    at 0x4105C0D: alloc_slow_path (fixedsizealloc.c:131)
==6431==    by 0x4105D98: MVM_fixed_size_alloc (fixedsizealloc.c:181)
==6431==    by 0x41980D0: twiddle_trie_node (nfg.c:46)
==6431==    by 0x4198142: twiddle_trie_node (nfg.c:52)
==6431==    by 0x4198427: add_synthetic_to_trie (nfg.c:138)
==6431==    by 0x4198604: add_synthetic (nfg.c:188)
==6431==    by 0x419869A: lookup_or_add_synthetic (nfg.c:202)
==6431==    by 0x41986F1: MVM_nfg_codes_to_grapheme (nfg.c:217)
==6431==    by 0x41AD211: grapheme_composition (normalize.c:558)
==6431==    by 0x41AD5B9: MVM_unicode_normalizer_process_codepoint_full (normalize.c:661)
==6431==    by 0x41952A4: MVM_unicode_normalizer_process_codepoint (normalize.h:111)
==6431==    by 0x41952D0: MVM_unicode_normalizer_process_codepoint_to_grapheme (normalize.h:119)
==6431== 
==6431== Invalid free() / delete / delete[] / realloc()
==6431==    at 0x41060AD: MVM_fixed_size_free_at_safepoint (fixedsizealloc.c:286)
==6431==    by 0x41983DE: twiddle_trie_node (nfg.c:132)
==6431==    by 0x4198142: twiddle_trie_node (nfg.c:52)
==6431==    by 0x4198142: twiddle_trie_node (nfg.c:52)
==6431==    by 0x4198427: add_synthetic_to_trie (nfg.c:138)
==6431==    by 0x4198604: add_synthetic (nfg.c:188)
==6431==    by 0x419869A: lookup_or_add_synthetic (nfg.c:202)
==6431==    by 0x41986F1: MVM_nfg_codes_to_grapheme (nfg.c:217)
==6431==    by 0x41AD211: grapheme_composition (normalize.c:558)
==6431==    by 0x41AD5B9: MVM_unicode_normalizer_process_codepoint_full (normalize.c:661)
==6431==    by 0x41952A4: MVM_unicode_normalizer_process_codepoint (normalize.h:111)
==6431==    by 0x41952D0: MVM_unicode_normalizer_process_codepoint_to_grapheme (normalize.h:119)
==6431==  Address 0x890006c is 0 bytes inside a block of size 16 client-defined
==6431==    at 0x4105C0D: alloc_slow_path (fixedsizealloc.c:131)
==6431==    by 0x4105D98: MVM_fixed_size_alloc (fixedsizealloc.c:181)
==6431==    by 0x41980D0: twiddle_trie_node (nfg.c:46)
==6431==    by 0x4198142: twiddle_trie_node (nfg.c:52)
==6431==    by 0x4198142: twiddle_trie_node (nfg.c:52)
==6431==    by 0x4198427: add_synthetic_to_trie (nfg.c:138)
==6431==    by 0x4198604: add_synthetic (nfg.c:188)
==6431==    by 0x419869A: lookup_or_add_synthetic (nfg.c:202)
==6431==    by 0x41986F1: MVM_nfg_codes_to_grapheme (nfg.c:217)
==6431==    by 0x41AD211: grapheme_composition (normalize.c:558)
==6431==    by 0x41AD5B9: MVM_unicode_normalizer_process_codepoint_full (normalize.c:661)
==6431==    by 0x41952A4: MVM_unicode_normalizer_process_codepoint (normalize.h:111)
==6431== 
Hello World
==6431== 
==6431== HEAP SUMMARY:
==6431==     in use at exit: 152,880 bytes in 38,808 blocks
==6431==   total heap usage: 321,135 allocs, 221,719 frees, 46,550,757 bytes allocated
==6431== 
==6431== LEAK SUMMARY:
==6431==    definitely lost: 5,454 bytes in 34,380 blocks
==6431==    indirectly lost: 14,040 bytes in 668 blocks
==6431==      possibly lost: 120,032 bytes in 3,751 blocks
==6431==    still reachable: 13,354 bytes in 9 blocks
==6431==         suppressed: 0 bytes in 0 blocks
==6431== Rerun with --leak-check=full to see details of leaked memory
==6431== 
==6431== For counts of detected and suppressed errors, rerun with: -v
==6431== ERROR SUMMARY: 8 errors from 3 contexts (suppressed: 0 from 0)