On file write, after selection, shutter hangs CPU 100%

[Wsteven]

When I do a new selection, Shutter does write file to disk, but hangs letting CPU at 100%. And I'm forced to kill it... Maybe it does at some point unlock itself, but didn't wait long enough then. Here is a full trace :

```
$ shutter
WARNING: gnome-web-photo is missing --> screenshots of websites will be disabled!

WARNING: Image::ExifTool is missing --> writing Exif information will be disabled!

WARNING: Gtk2::AppIndicator is missing --> there will be no icon showing up in the status bar when running Unity!

INFO: gathering system information...

Linux steven-HP-Z400-Workstation 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Linux Mint 19 Tara \n \l

Glib 1.326
Gtk2 1.24992

Glib built for 2.53.4, running with 2.56.4
Gtk2 built for 2.24.31, running with 2.24.32

GdkPixbuf-LOG **: gdk_pixbuf_from_pixdata() called on: at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Encoding raw at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Dimensions: 16 x 16 at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Rowstride: 64, Length: 1048 at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Copy pixels == false at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: gdk_pixbuf_from_pixdata() called on: at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Encoding raw at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Dimensions: 16 x 16 at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Rowstride: 64, Length: 1048 at /usr/bin/shutter line 527, <DATA> line 19.
GdkPixbuf-LOG **: Copy pixels == false at /usr/bin/shutter line 527, <DATA> line 19.
File::Glob::glob() will disappear in perl 5.30. Use File::Glob::bsd_glob() instead. at /usr/bin/shutter line 8212.
Déformation en tonneau - /usr/share/shutter/resources/system/plugins/perl/spbardistortion/spbardistortion
Inverser - /usr/share/shutter/resources/system/plugins/perl/spnegate/spnegate
Polaroid - /usr/share/shutter/resources/system/plugins/perl/sppolaroid/sppolaroid
Redimensionner - /usr/share/shutter/resources/system/plugins/perl/spresize/spresize
Sépia - /usr/share/shutter/resources/system/plugins/perl/spsepia/spsepia
Ombre dure - /usr/share/shutter/resources/system/plugins/perl/spshadow/spshadow
Filigrane - /usr/share/shutter/resources/system/plugins/perl/spwatermark/spwatermark
Niveaux de gris - /usr/share/shutter/resources/system/plugins/shell/spgrayscale/spgrayscale
Décalage - /usr/share/shutter/resources/system/plugins/shell/spoffset/spoffset
Élever une bordure - /usr/share/shutter/resources/system/plugins/shell/spraise/spraise
Bords doux - /usr/share/shutter/resources/system/plugins/shell/spsoftedges/spsoftedges [73/78658]
Abaisser la bordure - /usr/share/shutter/resources/system/plugins/shell/spsunk/spsunk
Papier corné - /usr/share/shutter/resources/system/plugins/shell/sptornedpaper/sptornedpaper
Rognage auto - /usr/share/shutter/resources/system/plugins/shell/sptrim/sptrim

INFO: new upload-plugin information detected - /usr/share/shutter/resources/system/upload_plugins/upload/vgyme
Unescaped left brace in regex is illegal here in regex; marked by <-- HERE in m/^<.*>\n{ <-- HERE / at /usr/share/shutter/resources/system/upload_plugins/upload/vgyme.pm line 159.

ERROR: upload-plugin exists but does not work properly - /usr/share/shutter/resources/system/upload_plugins/upload/vgyme
Current window manager: Metacity (Marco)
Current window manager: Metacity (Marco)
Current window manager: Metacity (Marco)
Current window manager: Metacity (Marco)

type_changed was emitted by widget Gtk2::ComboBox=HASH(0x56421f1f0770)

progname_toggled was emitted by widget Gtk2::CheckButton=HASH(0x56421f1d90f8)

im_colors_changed was emitted by widget Gtk2::ComboBox=HASH(0x564222229cd8)

im_colors_toggled was emitted by widget Gtk2::CheckButton=HASH(0x564222229d68)

thumbnail_changed was emitted by widget Gtk2::HScale=HASH(0x564222229e10)

thumbnail_toggled was emitted by widget Gtk2::CheckButton=HASH(0x564222229dc8)

bordereffect_toggled was emitted by widget Gtk2::CheckButton=HASH(0x564222229ed0)

bordereffect_changed was emitted by widget Gtk2::SpinButton=HASH(0x564222229ee8)

menu_delay_changed was emitted by widget Gtk2::SpinButton=HASH(0x56422222a290)

hide_time_changed was emitted by widget Gtk2::SpinButton=HASH(0x56422222a860)

ns_changed was emitted by widget Gtk2::ComboBox=HASH(0x56422222a908)

fct_update_tray_menu was called by Gnome2::Wnck::Screen=HASH(0x564221f6d110)
Updating fileinfos for key: [1] - Sélection_016.png
file:///home/steven/Images/Sélection_016.png thumbnail already exists
file:///home/steven/Images/Sélection_016.png thumbnail already exists
Updating fileinfos for key: [2] - Sélection_018.png
file:///home/steven/Images/Sélection_018.png thumbnail already exists
file:///home/steven/Images/Sélection_018.png thumbnail already exists
Updating fileinfos for key: [3] - Sélection_019.png
file:///home/steven/Images/Sélection_019.png thumbnail already exists
file:///home/steven/Images/Sélection_019.png thumbnail already exists
Updating fileinfos for key: [4] - Sélection_020.png
file:///home/steven/Images/Sélection_020.png thumbnail already exists
file:///home/steven/Images/Sélection_020.png thumbnail already exists
Updating fileinfos for key: [5] - Sélection_021.png
file:///home/steven/Images/Sélection_021.png thumbnail already exists
file:///home/steven/Images/Sélection_021.png thumbnail already exists
Updating fileinfos for key: [6] - Sélection_022.png
file:///home/steven/Images/Sélection_022.png thumbnail already exists
file:///home/steven/Images/Sélection_022.png thumbnail already exists
Updating fileinfos for key: [7] - Sélection_023.png
file:///home/steven/Images/Sélection_023.png thumbnail already exists
file:///home/steven/Images/Sélection_023.png thumbnail already exists
GdkPixbuf-LOG **: gdk_pixbuf_from_pixdata() called on: at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Encoding raw at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Dimensions: 16 x 16 at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Rowstride: 64, Length: 1048 at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Copy pixels == false at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: gdk_pixbuf_from_pixdata() called on: at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Encoding raw at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Dimensions: 16 x 16 at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Rowstride: 64, Length: 1048 at /usr/bin/shutter line 2891.
GdkPixbuf-LOG **: Copy pixels == false at /usr/bin/shutter line 2891.

fct_update_tray_menu was called by Gnome2::Wnck::Screen=HASH(0x564221f6d110)

select was emitted by widget Gtk2::ToolButton=HASH(0x56421f1e3828)
3 Ns used in wild-card
Searching for files with pattern: (?^u:\$name_(\d\d\d)\.png)
Searching for files with pattern: (?^u:.{1,}_(\d\d\d)\.png)
Comparing Sélection_006.png
006 is currently greatest value...
Comparing Sélection_018.png
018 is currently greatest value...
Comparing Sélection_012.png
Comparing Sélection_023.png
023 is currently greatest value...
Comparing Sélection_029.png
029 is currently greatest value...
Comparing IMG_20191009_153632.jpg
Comparing IMG_20191009_161938.jpg
Comparing Sélection_003.png
Comparing Sélection_028.png
Comparing Sélection_024.png
Comparing Sélection_008.png
Comparing Sélection_010.png
Comparing Sélection_019.png
Comparing Sélection_021.png
Comparing Sélection_025.png
Comparing Sélection_013.png
Comparing IMG_20191009_153358.jpg
Comparing Sélection_017.png
Comparing Sélection_004.png
Comparing Sélection_016.png
Comparing Sélection_026.png
Comparing Sélection_011.png
Comparing IMG_20191009_162929.jpg
Comparing Sélection_007.png
Comparing Sélection_015.png
Comparing Sélection_020.png
Comparing Sélection_022.png
Comparing Sélection_002.png
Comparing Sélection_014.png
Comparing Sélection_027.png
Comparing Sélection_005.png
Comparing Sélection_001.png
Comparing Sélection_009.png
Using monitor: 0 - 0 - 1680 - 1050
Parsing wildcards for /home/steven/Images/$name_030.png
Parsed $width and $height: /home/steven/Images/$name_030.png
Parsed $profile: /home/steven/Images/$name_030.png
Parsed $name: /home/steven/Images/Sélection_030.png
New uri after exists check: file:///home/steven/Images/Sélection_030.png
Trying to save file to /home/steven/Images/Sélection_030.png
Saving file /home/steven/Images/Sélection_030.png, png, 9
Updating fileinfos for key: [8] - Sélection_030.png
file:///home/steven/Images/Sélection_030.png thumbnail created
file:///home/steven/Images/Sélection_030.png thumbnail already exists
screenshot successfully saved to /home/steven/Images/Sélection_030.png!
GLib-CRITICAL **: Source ID 293 was not found when attempting to remove it at /usr/bin/shutter line 7262.

fct_update_tray_menu was called by Gnome2::Wnck::Screen=HASH(0x564221f6d110)
```

I may be missing some dependencies, anyhow it shouldn't crash.
Bug sounds similar to https://bugs.launchpad.net/shutter/+bug/1237366/comments/8 .

Using version 0.94 Rev.1290

Regards,
Steven