Public bug reported:

Operating System: Kubuntu 26.04 LTS
KDE Plasma Version: 6.6.4
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.2
Kernel Version: 7.0.0-15-generic (64-bit)

CherryTree Giuseppe penone  version 1.20+dfsg-1build2  from ubuntu

after upgrade from Kubuntu 25.10 to Kubuntu 26.04

when pasting from a webpage onto a page in cherrytree it freezes or
crashes.

also before the upgrade when copy - pasting from a web page it only brought the 
text with their colour etc.
now the copy paste brings all the hypertext markup language effectively 
unusable,
must paste as text only with control shift V so not to paste the hypertext but 
colours and other attributes are lost in the process.


Storage: 
/var/lib/systemd/coredump/core.cherrytree.1000.abc6365aa33541dca93d3cdea5b329a6.33605.1778818479000000.zst
 (present)
  Size on Disk: 6.1M
       Package: cherrytree/1.2.0+dfsg-1build2
      build-id: 297fa5ba1b8ffd2ea9c796e9e404acafb6265e77
       Message: Process 33605 (cherrytree) of user 1000 dumped core.
                
                Module /usr/bin/cherrytree from deb 
cherrytree-1.2.0+dfsg-1build2.amd64
                Module linux-vdso.so.1 from deb linux-7.0.0-15.15.amd64
                Module libwindow-decorations-gtk-module.so from deb 
kde-gtk-config-4:6.6.4-0ubuntu1.amd64
                Module libcolorreload-gtk-module.so from deb 
kde-gtk-config-4:6.6.4-0ubuntu1.amd64
                Module libhunspell-1.7.so.0 from deb 
hunspell-1.7.2+really1.7.2-11.amd64
                Module enchant_hunspell.so from deb 
enchant-2-2.8.2+dfsg1-3build1.amd64
                Module enchant_hspell.so from deb 
enchant-2-2.8.2+dfsg1-3build1.amd64
                Module libaspell.so.15 from deb aspell-0.60.8.2-3.amd64
                Module enchant_aspell.so from deb 
enchant-2-2.8.2+dfsg1-3build1.amd64
                Module im-wayland.so from deb gtk+3.0-3.24.52-0ubuntu1.amd64
                Module libnss_systemd.so.2 from deb systemd-259.5-0ubuntu3.amd64
                Module libdconfsettings.so from deb dconf-0.49.0-4.amd64
                Module libkeyutils.so.1 from deb keyutils-1.6.3-6ubuntu3.amd64
                Module libXRes.so.1 from deb libxres-2:1.2.1-1build2.amd64
                Module libseccomp.so.2 from deb libseccomp-2.6.0-2ubuntu5.amd64
                Module liblcms2.so.2 from deb lcms2-2.17-1ubuntu0.2.amd64
                Module libxxhash.so.0 from deb xxhash-0.8.3-2build1.amd64
                Module libtasn1.so.6 from deb libtasn1-6-4.21.0-2.amd64
                Module libp11-kit.so.0 from deb p11-kit-0.26.2-2.amd64
                Module libbrotlicommon.so.1 from deb brotli-1.2.0-3build1.amd64
                Module libkrb5support.so.0 from deb krb5-1.22.1-2ubuntu4.amd64
                Module libcom_err.so.2 from deb e2fsprogs-1.47.2-3ubuntu4.amd64
                Module libk5crypto.so.3 from deb krb5-1.22.1-2ubuntu4.amd64
                Module libkrb5.so.3 from deb krb5-1.22.1-2ubuntu4.amd64
                Module libsasl2.so.2 from deb 
cyrus-sasl2-2.1.28+dfsg1-9ubuntu3.amd64
                Module libgmp.so.10 from deb gmp-2:6.3.0+dfsg-5ubuntu2.amd64
                Module libnettle.so.8 from deb nettle-3.10.2-1.amd64
                Module libhogweed.so.6 from deb nettle-3.10.2-1.amd64
                Module libunistring.so.5 from deb libunistring-1.3-2build1.amd64
                Module libicudata.so.78 from deb icu-78.2-2ubuntu1.amd64
                Module libblkid.so.1 from deb util-linux-2.41.3-3ubuntu2.amd64
                Module libXdmcp.so.6 from deb libxdmcp-1:1.1.5-2.amd64
                Module libXau.so.6 from deb libxau-1:1.0.11-1build2.amd64
                Module libbz2.so.1.0 from deb bzip2-1.0.8-6build2.amd64
                Module libdatrie.so.1 from deb libdatrie-0.2.14-1.amd64
                Module libdbus-1.so.3 from deb dbus-1.16.2-2ubuntu4.amd64
                Module libatspi.so.0 from deb at-spi2-core-2.60.0-1.amd64
                Module libexpat.so.1 from deb expat-2.7.4-1.amd64
                Module libgraphite2.so.3 from deb 
graphite2-1.3.14-11ubuntu1.amd64
                Module libglycin-2.so.0 from deb glycin-2.1.1+ds-0ubuntu1.amd64
                Module libatomic.so.1 from deb gcc-16-16-20260322-1ubuntu1.amd64
                Module libffi.so.8 from deb libffi-3.5.2-4.amd64
                Module libsystemd.so.0 from deb systemd-259.5-0ubuntu3.amd64
                Module libsimdutf.so.31 from deb simdutf-8.0.0-1.amd64
                Module liblz4.so.1 from deb lz4-1.10.0-8.amd64
                Module libpcre2-8.so.0 from deb pcre2-10.46-1build1.amd64
                Module libgnutls.so.30 from deb gnutls28-3.8.12-2ubuntu1.amd64
                Module libbrotlidec.so.1 from deb brotli-1.2.0-3build1.amd64
                Module libzstd.so.1 from deb libzstd-1.5.7+dfsg-3.amd64
                Module libgssapi_krb5.so.2 from deb krb5-1.22.1-2ubuntu4.amd64
                Module libcrypto.so.3 from deb openssl-3.5.5-1ubuntu3.amd64
                Module libssl.so.3 from deb openssl-3.5.5-1ubuntu3.amd64
                Module libpsl.so.5 from deb libpsl-0.21.2-1.1build2.amd64
                Module libssh2.so.1 from deb libssh2-1.11.1-1build2.amd64
                Module liblber.so.2 from deb openldap-2.6.10+dfsg-1ubuntu5.amd64
                Module libldap.so.2 from deb openldap-2.6.10+dfsg-1ubuntu5.amd64
                Module librtmp.so.1 from deb 
rtmpdump-2.4+20151223.gitfa8646d.1-3.amd64
                Module libidn2.so.0 from deb libidn2-2.3.8-4build1.amd64
                Module libnghttp2.so.14 from deb nghttp2-1.68.0-2ubuntu0.1.amd64
                Module libicuuc.so.78 from deb icu-78.2-2ubuntu1.amd64
                Module libenchant-2.so.2 from deb 
enchant-2-2.8.2+dfsg1-3build1.amd64
                Module libselinux.so.1 from deb libselinux-3.9-4build1.amd64
                Module libmount.so.1 from deb util-linux-2.41.3-3ubuntu2.amd64
                Module libpixman-1.so.0 from deb pixman-0.46.4-1.amd64
                Module libxcb-shm.so.0 from deb libxcb-1.17.0-2ubuntu1.amd64
                Module libxcb-render.so.0 from deb libxcb-1.17.0-2ubuntu1.amd64
                Module libxcb.so.1 from deb libxcb-1.17.0-2ubuntu1.amd64
                Module libXrender.so.1 from deb 
libxrender-1:0.9.12-1build1.amd64
                Module libfreetype.so.6 from deb freetype-2.14.2+dfsg-1.amd64
                Module libpng16.so.16 from deb libpng1.6-1.6.57-1.amd64
                Module libz.so.1 from deb 
zlib-1:1.3.dfsg+really1.3.1-1ubuntu3.amd64
                Module libthai.so.0 from deb libthai-0.1.30-1.amd64
                Module libXinerama.so.1 from deb 
libxinerama-2:1.1.4-3build2.amd64
                Module libXrandr.so.2 from deb libxrandr-2:1.5.4-1build1.amd64
                Module libXcomposite.so.1 from deb 
libxcomposite-1:0.4.6-1build1.amd64
                Module libXdamage.so.1 from deb libxdamage-1:1.1.7-1.amd64
                Module libXcursor.so.1 from deb libxcursor-1:1.2.3-1build1.amd64
                Module libXext.so.6 from deb libxext-2:1.3.4-1build3.amd64
                Module libwayland-egl.so.1 from deb wayland-1.24.0-2.amd64
                Module libwayland-cursor.so.0 from deb wayland-1.24.0-2.amd64
                Module libwayland-client.so.0 from deb wayland-1.24.0-2.amd64
                Module libxkbcommon.so.0 from deb libxkbcommon-1.13.1-1.amd64
                Module libXfixes.so.3 from deb libxfixes-1:6.0.0-2build2.amd64
                Module libatk-bridge-2.0.so.0 from deb 
at-spi2-core-2.60.0-1.amd64
                Module libX11.so.6 from deb libx11-2:1.8.13-1.amd64
                Module libXi.so.6 from deb libxi-2:1.8.2-2.amd64
                Module libepoxy.so.0 from deb libepoxy-1.5.10-2build1.amd64
                Module libcairo-gobject.so.2 from deb cairo-1.18.4-3.amd64
                Module libfontconfig.so.1 from deb 
fontconfig-2.17.1-3ubuntu1.amd64
                Module libpangoft2-1.0.so.0 from deb pango1.0-1.57.0-1.amd64
                Module libharfbuzz.so.0 from deb harfbuzz-12.3.2-2.amd64
                Module libpangocairo-1.0.so.0 from deb pango1.0-1.57.0-1.amd64
                Module libgmodule-2.0.so.0 from deb glib2.0-2.88.0-1.amd64
                Module libgdk_pixbuf-2.0.so.0 from deb 
gdk-pixbuf-2.44.5+dfsg-4ubuntu1.amd64
                Module libatk-1.0.so.0 from deb at-spi2-core-2.60.0-1.amd64
                Module libgcc_s.so.1 from deb gcc-16-16-20260322-1ubuntu1.amd64
                Module libstdc++.so.6 from deb gcc-16-16-20260322-1ubuntu1.amd64
                Module libsigc-2.0.so.0 from deb 
libsigc++-2.0-2.12.1-4build1.amd64
                Module libglib-2.0.so.0 from deb glib2.0-2.88.0-1.amd64
                Module libgobject-2.0.so.0 from deb glib2.0-2.88.0-1.amd64
                Module libglibmm-2.4.so.1 from deb glibmm2.4-2.66.8-3.amd64
                Module libvte-2.91.so.0 from deb vte2.91-0.84.0-2.amd64
                Module libfmt.so.10 from deb fmtlib-10.1.1+ds1-4build1.amd64
                Module libfribidi.so.0 from deb fribidi-1.0.16-5.amd64
                Module libuchardet.so.0 from deb uchardet-0.0.8-2.amd64
                Module libcurl.so.4 from deb curl-8.18.0-1ubuntu2.1.amd64
                Module libsqlite3.so.0 from deb sqlite3-3.46.1-9.amd64
                Module libxml2.so.16 from deb libxml2-2.15.2+dfsg-0.1.amd64
                Module libxml++-2.6.so.2 from deb 
libxml++2.6-2.42.3-2build2.amd64
                Module libgspell-1.so.3 from deb gspell-1.14.2-2.amd64
                Module libgtksourceview-4.so.0 from deb 
gtksourceview4-4.8.4-9.amd64
                Module libgio-2.0.so.0 from deb glib2.0-2.88.0-1.amd64
                Module libcairo.so.2 from deb cairo-1.18.4-3.amd64
                Module libpango-1.0.so.0 from deb pango1.0-1.57.0-1.amd64
                Module libcairomm-1.0.so.1 from deb cairomm-1.14.5-3.amd64
                Module libpangomm-1.4.so.1 from deb pangomm-2.46.4-2.amd64
                Module libgdk-3.so.0 from deb gtk+3.0-3.24.52-0ubuntu1.amd64
                Module libgtk-3.so.0 from deb gtk+3.0-3.24.52-0ubuntu1.amd64
                Module libgiomm-2.4.so.1 from deb glibmm2.4-2.66.8-3.amd64
                Module libgdkmm-3.0.so.1 from deb gtkmm3.0-3.24.10-2.amd64
                Module libatkmm-1.6.so.1 from deb atkmm1.6-2.28.4-2.amd64
                Module libgtkmm-3.0.so.1 from deb gtkmm3.0-3.24.10-2.amd64
                Stack trace of thread 33605:
                #0  0x00007040e34d25ca __GI___wcscoll_l (libc.so.6 + 0xd25ca)
                #1  0x00007040e3ba7eb6 g_utf8_collate (libglib-2.0.so.0 + 
0xa2eb6)
                #2  0x0000620e1800e81e n/a (/usr/bin/cherrytree + 0x49e81e)
                #3  0x00007040e41a23fe n/a (libxml2.so.16 + 0x893fe)
                #4  0x00007040e41a3ffb n/a (libxml2.so.16 + 0x8affb)
                #5  0x00007040e41a43e4 htmlParseDocument (libxml2.so.16 + 
0x8b3e4)
                #6  0x00007040e41a5851 htmlSAXParseDoc (libxml2.so.16 + 0x8c851)
                #7  0x0000620e1800e38a n/a (/usr/bin/cherrytree + 0x49e38a)
                #8  0x0000620e17f611ae n/a (/usr/bin/cherrytree + 0x3f11ae)
                #9  0x0000620e17f6178f n/a (/usr/bin/cherrytree + 0x3f178f)
                #10 0x0000620e17f57561 n/a (/usr/bin/cherrytree + 0x3e7561)
                #11 0x00007040e546b496 n/a (libgtkmm-3.0.so.1 + 0x26b496)
                #12 0x00007040e4bb93e1 n/a (libgtk-3.so.0 + 0x3b93e1)
                #13 0x00007040e48a18a5 n/a (libgtk-3.so.0 + 0xa18a5)
                #14 0x00007040e3c93cc9 n/a (libgobject-2.0.so.0 + 0x36cc9)
                #15 0x00007040e3c94095 g_signal_emit_by_name 
(libgobject-2.0.so.0 + 0x37095)
                #16 0x00007040e4aac681 n/a (libgtk-3.so.0 + 0x2ac681)
                #17 0x00007040e48a0601 n/a (libgtk-3.so.0 + 0xa0601)
                #18 0x00007040e3c93cc9 n/a (libgobject-2.0.so.0 + 0x36cc9)
                #19 0x00007040e3c93dc8 g_signal_emit_valist 
(libgobject-2.0.so.0 + 0x36dc8)
                #20 0x00007040e3c93e83 g_signal_emit (libgobject-2.0.so.0 + 
0x36e83)
                #21 0x00007040e4b8a18d n/a (libgtk-3.so.0 + 0x38a18d)
                #22 0x00007040e4a157a3 gtk_main_do_event (libgtk-3.so.0 + 
0x2157a3)
                #23 0x00007040e4733db7 n/a (libgdk-3.so.0 + 0x3fdb7)
                #24 0x00007040e476e7ae n/a (libgdk-3.so.0 + 0x7a7ae)
                #25 0x00007040e3b65b9b n/a (libglib-2.0.so.0 + 0x60b9b)
                #26 0x00007040e3b671d7 n/a (libglib-2.0.so.0 + 0x621d7)
                #27 0x00007040e3b673c3 g_main_context_iteration 
(libglib-2.0.so.0 + 0x623c3)
                #28 0x00007040e4442acd g_application_run (libgio-2.0.so.0 + 
0xebacd)
                #29 0x0000620e17cd895c n/a (/usr/bin/cherrytree + 0x16895c)
                #30 0x00007040e342a601 __libc_start_call_main (libc.so.6 + 
0x2a601)
                #31 0x00007040e342a718 __libc_start_main_impl (libc.so.6 + 
0x2a718)
                #32 0x0000620e17de63e5 n/a (/usr/bin/cherrytree + 0x2763e5)
                
                Stack trace of thread 33613:
                #0  0x00007040e3534d0d syscall (libc.so.6 + 0x134d0d)
                #1  0x00007040e163cb66 n/a (libglycin-2.so.0 + 0x3cb66)
                #2  0x00007040e17611fa n/a (libglycin-2.so.0 + 0x1611fa)
                #3  0x00007040e1760dec n/a (libglycin-2.so.0 + 0x160dec)
                #4  0x00007040e188de64 n/a (libglycin-2.so.0 + 0x28de64)
                #5  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #6  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                
                Stack trace of thread 33606:
                #0  0x00007040e3534d0d syscall (libc.so.6 + 0x134d0d)
                #1  0x00007040e3b92eab g_cond_wait (libglib-2.0.so.0 + 0x8deab)
                #2  0x00007040e3b2df6c n/a (libglib-2.0.so.0 + 0x28f6c)
                #3  0x00007040e3b2dfdc g_async_queue_pop (libglib-2.0.so.0 + 
0x28fdc)
                #4  0x00007040e3681dcb n/a (libpangoft2-1.0.so.0 + 0xedcb)
                #5  0x00007040e3b9c279 n/a (libglib-2.0.so.0 + 0x97279)
                #6  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #7  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                
                Stack trace of thread 33611:
                #0  0x00007040e34acae2 __syscall_cancel_arch (libc.so.6 + 
0xacae2)
                #1  0x00007040e34a067c __internal_syscall_cancel (libc.so.6 + 
0xa067c)
                #2  0x00007040e3528376 __GI_ppoll (libc.so.6 + 0x128376)
                #3  0x00007040e3b672f1 n/a (libglib-2.0.so.0 + 0x622f1)
                #4  0x00007040e3b673c3 g_main_context_iteration 
(libglib-2.0.so.0 + 0x623c3)
                #5  0x00007040e56b097d n/a (libdconfsettings.so + 0x897d)
                #6  0x00007040e3b9c279 n/a (libglib-2.0.so.0 + 0x97279)
                #7  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #8  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                
                Stack trace of thread 33608:
                #0  0x00007040e34acae2 __syscall_cancel_arch (libc.so.6 + 
0xacae2)
                #1  0x00007040e34a067c __internal_syscall_cancel (libc.so.6 + 
0xa067c)
                #2  0x00007040e3528376 __GI_ppoll (libc.so.6 + 0x128376)
                #3  0x00007040e3b672f1 n/a (libglib-2.0.so.0 + 0x622f1)
                #4  0x00007040e3b673c3 g_main_context_iteration 
(libglib-2.0.so.0 + 0x623c3)
                #5  0x00007040e3b67411 n/a (libglib-2.0.so.0 + 0x62411)
                #6  0x00007040e3b9c279 n/a (libglib-2.0.so.0 + 0x97279)
                #7  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #8  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                
                Stack trace of thread 33607:
                #0  0x00007040e3534d0d syscall (libc.so.6 + 0x134d0d)
                #1  0x00007040e3b92eab g_cond_wait (libglib-2.0.so.0 + 0x8deab)
                #2  0x00007040e3b2df6c n/a (libglib-2.0.so.0 + 0x28f6c)
                #3  0x00007040e3b9c714 n/a (libglib-2.0.so.0 + 0x97714)
                #4  0x00007040e3b9c279 n/a (libglib-2.0.so.0 + 0x97279)
                #5  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #6  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                
                Stack trace of thread 33612:
                #0  0x00007040e17618e3 n/a (libglycin-2.so.0 + 0x1618e3)
                #1  0x00007040e175a582 n/a (libglycin-2.so.0 + 0x15a582)
                #2  0x00007040e1758989 n/a (libglycin-2.so.0 + 0x158989)
                #3  0x00007040e1758891 n/a (libglycin-2.so.0 + 0x158891)
                #4  0x00007040e188de64 n/a (libglycin-2.so.0 + 0x28de64)
                #5  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #6  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                
                Stack trace of thread 34596:
                #0  0x00007040e34acae2 __syscall_cancel_arch (libc.so.6 + 
0xacae2)
                #1  0x00007040e34a05ec __internal_syscall_cancel (libc.so.6 + 
0xa05ec)
                #2  0x00007040e34a09c7 __futex_abstimed_wait_common64 
(libc.so.6 + 0xa09c7)
                #3  0x00007040e34a33a7 __pthread_cond_wait_common (libc.so.6 + 
0xa33a7)
                #4  0x0000620e17e8b753 n/a (/usr/bin/cherrytree + 0x31b753)
                #5  0x00007040e38f5ef9 n/a (libstdc++.so.6 + 0xf5ef9)
                #6  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #7  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                
                Stack trace of thread 33610:
                #0  0x00007040e34acae2 __syscall_cancel_arch (libc.so.6 + 
0xacae2)
                #1  0x00007040e34a067c __internal_syscall_cancel (libc.so.6 + 
0xa067c)
                #2  0x00007040e3528376 __GI_ppoll (libc.so.6 + 0x128376)
                #3  0x00007040e3b672f1 n/a (libglib-2.0.so.0 + 0x622f1)
                #4  0x00007040e3b67577 g_main_loop_run (libglib-2.0.so.0 + 
0x62577)
                #5  0x00007040e447c012 n/a (libgio-2.0.so.0 + 0x125012)
                #6  0x00007040e3b9c279 n/a (libglib-2.0.so.0 + 0x97279)
                #7  0x00007040e34a40da start_thread (libc.so.6 + 0xa40da)
                #8  0x00007040e35377ac __clone3 (libc.so.6 + 0x1377ac)
                ELF object binary architecture: AMD x86-64

** Affects: cherrytree (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2152669

Title:
  crashing after upgrade to kubuntu 26.04 from 25.10

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