Stack smashing detected on startup

When I try to open the app it hangs for a while and closes. This is the output if I try to open it in a terminal:

$ flatpak run com.vivaldi.Vivaldi 
Gtk-Message: 11:10:01.311: Failed to load module "xapp-gtk3-module"
[2 zypak-helper] Wait found events, but sd-event found none
Gtk-Message: 11:10:01.517: Failed to load module "xapp-gtk3-module"
*** stack smashing detected ***: terminated
[0425/111001.634368:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111004.559089:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
*** stack smashing detected ***: terminated
[0425/111004.594474:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111007.874869:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
*** stack smashing detected ***: terminated
[0425/111007.921703:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111013.329589:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
*** stack smashing detected ***: terminated
[0425/111013.416926:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111013.846475:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
*** stack smashing detected ***: terminated
[0425/111013.886842:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111014.339588:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
*** stack smashing detected ***: terminated
[0425/111014.374450:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111014.780264:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
*** stack smashing detected ***: terminated
[0425/111014.882227:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111015.439346:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
*** stack smashing detected ***: terminated
[0425/111015.540947:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111016.086413:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
[2:2:0425/111016.134669:ERROR:CONSOLE(242)] "<webview>: Script cannot be injected into content until the page has loaded.", source: extensions::webView (242)
*** stack smashing detected ***: terminated
[0425/111016.163157:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)
[2:2:0425/111016.628883:ERROR:gpu_process_host.cc(991)] GPU process exited unexpectedly: exit_code=134
[2:2:0425/111016.628904:FATAL:gpu_data_manager_impl_private.cc(448)] GPU process isn't usable. Goodbye.
[0425/111016.629011:ERROR:scoped_ptrace_attach.cc(27)] ptrace: Operation not permitted (1)

My system has Linux Mint 21.3 Cinnamon. Details are here.

No source files or tests are named. Start by reproducing the launch failure with flatpak run com.vivaldi.Vivaldi on Linux Mint 21.3 Cinnamon and investigate the reported stack-smashing and GPU-process errors; done means the app starts without those failures.