**Disclaimer**: I tried to follow KDE guideline ( https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports ) to provide backtrace, but my lack of familiarity with gdb and poor KDE documentation lead to waste of my time and getting stuck at `(gdb)` after running `gdb kmail ~/core.core`. No GUI window openned, and typing `help` told showed some commands such as "status", but none of them were valid commands and they resaulted in gdb error! Well, I tried! If there is anything I can provide, please give me a step-by-step guide and I will follow and report back. Until then, this bug report is to the best of my efforts. SUMMARY Opening the signed (not encrypted, just signed) from the outbox causes crash. I was sending an email with a ZIP attachment which contained a js file. KMail failed to send the email and put it inside Outbox. This is the error I got: "Failed to transport message. Server error: Rejected: forbidden file type in zip attachment: test/static/script.js" I opened Outbox, right-clicked on the email and pressed "Edit as new" and it crashed. removing the singing solves the issue. It is possible that its is also due to having a Zip file. STEPS TO REPRODUCE 1. create an email that will fail (add a javascript file to a zip file and send to gmail) 2. when the sending fails, it goes to outbox. open the outbox 3. right-click and select "Edit as new" 4. observe the crash OBSERVED RESULT Crash. EXPECTED RESULT Not to crash SOFTWARE/OS VERSIONS Linux/KDE Plasma: Manjaro KDE Plasma Wayland (available in About System) KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.113.0 Qt Version: 5.15.12 Kernel Version: 6.6.10-1-MANJARO (64-bit) Graphics Platform: Wayland Processors: 4 × Intel® Core™ i5-7440HQ CPU @ 2.80GHz Memory: 15.4 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 630 Manufacturer: LENOVO ADDITIONAL INFORMATION ❯ kmail org.kde.pim.kmail: setFcc: collection invalid "" qt.qpa.wayland: Wayland does not support QWindow::requestActivate() qt.qpa.wayland: setGrabPopup called with a parent, QtWaylandClient::QWaylandXdgSurface(0x558a3c27c750) which does not match the current topmost grabbing popup, QtWaylandClient::QWaylandXdgSurface(0x558a3b93e660) According to the xdg-shell protocol, this is not allowed. The wayland QPA plugin is currently handling it by setting the parent to the topmost grabbing popup. Note, however, that this may cause positioning errors and popups closing unxpectedly because xdg-shell mandate that child popups close before parents qt.qpa.wayland: Wayland does not support QWindow::requestActivate() gpg.qgpgme: found no group for entry verbose of component "tpm2daemon" gpg.qgpgme: found no group for entry quiet of component "tpm2daemon" gpg.qgpgme: found no group for entry debug-level of component "tpm2daemon" gpg.qgpgme: found no group for entry log-file of component "tpm2daemon" qt.qpa.wayland: setGrabPopup called with a parent, QtWaylandClient::QWaylandXdgSurface(0x558a3c27c750) which does not match the current topmost grabbing popup, QtWaylandClient::QWaylandXdgSurface(0x558a3b1c92a0) According to the xdg-shell protocol, this is not allowed. The wayland QPA plugin is currently handling it by setting the parent to the topmost grabbing popup. Note, however, that this may cause positioning errors and popups closing unxpectedly because xdg-shell mandate that child popups close before parents qt.qpa.wayland: setGrabPopup called with a parent, QtWaylandClient::QWaylandXdgSurface(0x558a3c27c750) which does not match the current topmost grabbing popup, QtWaylandClient::QWaylandXdgSurface(0x558a3b1c92a0) According to the xdg-shell protocol, this is not allowed. The wayland QPA plugin is currently handling it by setting the parent to the topmost grabbing popup. Note, however, that this may cause positioning errors and popups closing unxpectedly because xdg-shell mandate that child popups close before parents qt.qpa.wayland: setGrabPopup called with a parent, QtWaylandClient::QWaylandXdgSurface(0x558a3c27c750) which does not match the current topmost grabbing popup, QtWaylandClient::QWaylandXdgSurface(0x558a3ca2dd80) According to the xdg-shell protocol, this is not allowed. The wayland QPA plugin is currently handling it by setting the parent to the topmost grabbing popup. Note, however, that this may cause positioning errors and popups closing unxpectedly because xdg-shell mandate that child popups close before parents *** KMail got signal 11 (Exiting) *** Dead letters dumped. /tmp/messageviewer_bDNqOv.index.1.2 was not removed . /tmp/messageviewer_eueWeE.index.1.2 was not removed . /tmp/messageviewer_YpRDbE.index.2 was not removed . /tmp/messageviewer_bDNqOv.index.1.2 was removed . /tmp/messageviewer_eueWeE.index.1.2 was removed . /tmp/messageviewer_YpRDbE.index.2 was removed . KCrash: crashing... crashRecursionCounter = 2 KCrash: Application Name = kmail path = /usr/bin pid = 119850 KCrash: Arguments: /usr/bin/kmail [1] 119850 segmentation fault (core dumped) kmail Error code 139