paul@jacko:~$ valgrind --main-stacksize=28388608 --leak-check=full /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd 
==2873== Memcheck, a memory error detector
==2873== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==2873== Using Valgrind-3.17.0 and LibVEX; rerun with -h for copyright info
==2873== Command: /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd
==2873== 
==2876== Warning: invalid file descriptor 1024 in syscall close()
==2876== Warning: invalid file descriptor 1025 in syscall close()
==2876== Warning: invalid file descriptor 1026 in syscall close()
==2876== Warning: invalid file descriptor 1027 in syscall close()
==2876==    Use --log-fd=<number> to select an alternative log fd.
==2876== Warning: invalid file descriptor 1028 in syscall close()
==2876== Warning: invalid file descriptor 1029 in syscall close()
Registered thumbnailer atril-thumbnailer -s %s %u %o
Registered thumbnailer /usr/bin/gdk-pixbuf-thumbnailer -s %s %u %o
Registered thumbnailer gnome-thumbnail-font --size %s %u %o
Registered thumbnailer /usr/bin/gdk-pixbuf-thumbnailer -s %s %u %o
Registered thumbnailer /usr/share/blender/scripts/blender-thumbnailer.py %i %o

(tumblerd:2873): tumblerd-CRITICAL **: 11:23:12.774: Name org.freedesktop.thumbnails.Cache1 lost on the message dbus, exiting.

(tumblerd:2873): tumblerd-CRITICAL **: 11:23:12.800: Name org.freedesktop.thumbnails.Manager1 lost on the message dbus, exiting.

(tumblerd:2873): tumblerd-CRITICAL **: 11:23:12.801: Name org.freedesktop.thumbnails.Thumbnailer1 lost on the message dbus, exiting.
==2873== 
==2873== HEAP SUMMARY:
==2873==     in use at exit: 2,820,854 bytes in 29,539 blocks
==2873==   total heap usage: 221,516 allocs, 191,977 frees, 15,311,915 bytes allocated
==2873== 
==2873== 24 bytes in 1 blocks are definitely lost in loss record 1,903 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B30563: g_strdup (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4857E4F: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x111304: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 64 bytes in 1 blocks are definitely lost in loss record 3,179 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4016750: malloc (rtld-malloc.h:56)
==2873==    by 0x4016750: resize_scopes (dl-open.c:290)
==2873==    by 0x4016750: dl_open_worker (dl-open.c:705)
==2873==    by 0x4D5B287: _dl_catch_exception (dl-error-skeleton.c:208)
==2873==    by 0x40156EC: _dl_open (dl-open.c:858)
==2873==    by 0x4E1334B: dlopen_doit (dlopen.c:66)
==2873==    by 0x4D5B287: _dl_catch_exception (dl-error-skeleton.c:208)
==2873==    by 0x4D5B352: _dl_catch_error (dl-error-skeleton.c:227)
==2873==    by 0x4E13B88: _dlerror_run (dlerror.c:170)
==2873==    by 0x4E133D7: dlopen@@GLIBC_2.2.5 (dlopen.c:87)
==2873==    by 0x4DF0BDE: g_module_open (in /usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0.6705.0)
==2873==    by 0x4BF8D51: ??? (in /usr/lib/x86_64-linux-gnu/libtumbler-1.so.0.0.0)
==2873==    by 0x4A981FA: g_type_module_use (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873== 
==2873== 96 bytes in 3 blocks are definitely lost in loss record 4,045 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4AEEF99: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x1170E7: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x115FC8: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x111669: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 211 bytes in 5 blocks are definitely lost in loss record 4,349 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B30563: g_strdup (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4858C82: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x4A7A425: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7A803: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C1C7: g_object_new_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C6FC: g_object_new (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4858034: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x111304: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 243 bytes in 5 blocks are definitely lost in loss record 4,393 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B30563: g_strdup (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4857F87: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x111304: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 320 bytes in 1 blocks are possibly lost in loss record 4,473 of 4,645
==2873==    at 0x4847A25: calloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4014ABB: calloc (rtld-malloc.h:44)
==2873==    by 0x4014ABB: allocate_dtv (dl-tls.c:366)
==2873==    by 0x4014ABB: _dl_allocate_tls (dl-tls.c:612)
==2873==    by 0x50981B7: allocate_stack (allocatestack.c:622)
==2873==    by 0x50981B7: pthread_create@@GLIBC_2.2.5 (pthread_create.c:644)
==2873==    by 0x4B63ED4: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3A824: g_thread_new (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B11323: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x492EC97: ??? (in /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0.6705.0)
==2873==    by 0x492EFD4: g_task_get_type (in /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0.6705.0)
==2873==    by 0x499C218: ??? (in /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0.6705.0)
==2873==    by 0x498F9A6: g_bus_get_sync (in /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0.6705.0)
==2873==    by 0x11122F: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 320 bytes in 1 blocks are possibly lost in loss record 4,474 of 4,645
==2873==    at 0x4847A25: calloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4014ABB: calloc (rtld-malloc.h:44)
==2873==    by 0x4014ABB: allocate_dtv (dl-tls.c:366)
==2873==    by 0x4014ABB: _dl_allocate_tls (dl-tls.c:612)
==2873==    by 0x50981B7: allocate_stack (allocatestack.c:622)
==2873==    by 0x50981B7: pthread_create@@GLIBC_2.2.5 (pthread_create.c:644)
==2873==    by 0x4B63ED4: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3A824: g_thread_new (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x499E1A3: ??? (in /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0.6705.0)
==2873==    by 0x498F1F9: ??? (in /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0.6705.0)
==2873==    by 0x498FA13: g_bus_get_sync (in /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0.6705.0)
==2873==    by 0x11122F: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 512 bytes in 1 blocks are possibly lost in loss record 4,525 of 4,645
==2873==    at 0x4847A25: calloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4014ABB: calloc (rtld-malloc.h:44)
==2873==    by 0x4014ABB: allocate_dtv (dl-tls.c:366)
==2873==    by 0x4014ABB: _dl_allocate_tls (dl-tls.c:612)
==2873==    by 0x50981B7: allocate_stack (allocatestack.c:622)
==2873==    by 0x50981B7: pthread_create@@GLIBC_2.2.5 (pthread_create.c:644)
==2873==    by 0x4B63ED4: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3A8D2: g_thread_try_new (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3B0D6: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3B33E: g_thread_pool_new (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x11ADB4: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4A94959: g_type_create_instance (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7A73C: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C1C7: g_object_new_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C6FC: g_object_new (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873== 
==2873== 737 (24 direct, 713 indirect) bytes in 1 blocks are definitely lost in loss record 4,544 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B2E7D1: g_slice_alloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B0B039: g_list_prepend (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4857D58: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x111304: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 1,613 (528 direct, 1,085 indirect) bytes in 5 blocks are definitely lost in loss record 4,568 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B31FFC: g_strdupv (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4BF6243: ??? (in /usr/lib/x86_64-linux-gnu/libtumbler-1.so.0.0.0)
==2873==    by 0x4A7A425: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7A803: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C1C7: g_object_new_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C6FC: g_object_new (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4858034: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x111304: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 1,710 (1,000 direct, 710 indirect) bytes in 5 blocks are definitely lost in loss record 4,569 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B31FFC: g_strdupv (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4BF621B: ??? (in /usr/lib/x86_64-linux-gnu/libtumbler-1.so.0.0.0)
==2873==    by 0x4A7A425: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7A803: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C1C7: g_object_new_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C6FC: g_object_new (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4858034: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x111304: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== 2,048 bytes in 4 blocks are possibly lost in loss record 4,579 of 4,645
==2873==    at 0x4847A25: calloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4014ABB: calloc (rtld-malloc.h:44)
==2873==    by 0x4014ABB: allocate_dtv (dl-tls.c:366)
==2873==    by 0x4014ABB: _dl_allocate_tls (dl-tls.c:612)
==2873==    by 0x50981B7: allocate_stack (allocatestack.c:622)
==2873==    by 0x50981B7: pthread_create@@GLIBC_2.2.5 (pthread_create.c:644)
==2873==    by 0x4B63ED4: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3A8D2: g_thread_try_new (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3B0D6: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B3B33E: g_thread_pool_new (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x11BDCD: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4A94959: g_type_create_instance (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7A73C: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C1C7: g_object_new_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C6FC: g_object_new (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873== 
==2873== 16,384 bytes in 1 blocks are definitely lost in loss record 4,622 of 4,645
==2873==    at 0x4842839: malloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B16068: g_malloc (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4B20213: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4AD9B88: ??? (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x401196D: call_init.part.0 (dl-init.c:74)
==2873==    by 0x4011A57: call_init (dl-init.c:37)
==2873==    by 0x4011A57: _dl_init (dl-init.c:121)
==2873==    by 0x4001109: ??? (in /usr/lib/x86_64-linux-gnu/ld-2.33.so)
==2873== 
==2873== 46,454 (11,752 direct, 34,702 indirect) bytes in 5 blocks are definitely lost in loss record 4,634 of 4,645
==2873==    at 0x4847A25: calloc (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==2873==    by 0x4B160C0: g_malloc0 (in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6705.0)
==2873==    by 0x4BF6691: ??? (in /usr/lib/x86_64-linux-gnu/libtumbler-1.so.0.0.0)
==2873==    by 0x4A7A826: ??? (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C1C7: g_object_new_valist (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4A7C6FC: g_object_new (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6705.0)
==2873==    by 0x4858034: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/plugins/tumbler-desktop-thumbnailer.so)
==2873==    by 0x111304: ??? (in /usr/lib/x86_64-linux-gnu/tumbler-1/tumblerd)
==2873==    by 0x4C2B564: (below main) (libc-start.c:332)
==2873== 
==2873== LEAK SUMMARY:
==2873==    definitely lost: 30,326 bytes in 32 blocks
==2873==    indirectly lost: 37,210 bytes in 1,668 blocks
==2873==      possibly lost: 3,200 bytes in 7 blocks
==2873==    still reachable: 2,621,174 bytes in 27,096 blocks
==2873==         suppressed: 0 bytes in 0 blocks
==2873== Reachable blocks (those to which a pointer was found) are not shown.
==2873== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==2873== 
==2873== For lists of detected and suppressed errors, rerun with: -s
==2873== ERROR SUMMARY: 14 errors from 14 contexts (suppressed: 0 from 0)
paul@jacko:~$