Created attachment 608582 [details]
I am getting crashes every time that I try to show the print dialog with applications that use GTK (tried Firefox and Evince). The attached backtrace looks very similar to that described in https://gitlab.gnome.org/GNOME/gtk/merge_requests/1346, and indeed applying the patch from https://gitlab.gnome.org/GNOME/gtk/commit/3d5f083b75a0c2b50fb5528a19e0e095e85a438e solves the issue for me.
I can reproduce this problem with gtk+-3.24.13, but I do not recall having any trouble with earlier versions.
Created attachment 608584 [details]
The bug has been closed via the following commit(s):
Author: Mart Raudsepp <email@example.com>
AuthorDate: 2020-02-17 21:51:31 +0000
Commit: Mart Raudsepp <firstname.lastname@example.org>
CommitDate: 2020-02-17 21:53:22 +0000
x11-libs/gtk+: bump to 3.24.14
Package-Manager: Portage-2.3.84, Repoman-2.3.20
Signed-off-by: Mart Raudsepp <email@example.com>
x11-libs/gtk+/Manifest | 1 +
x11-libs/gtk+/gtk+-3.24.14.ebuild | 245 ++++++++++++++++++++++++++++++++++++++
2 files changed, 246 insertions(+)