I originally tried to submit https://bugs.kde.org/show_bug.cgi?id=420921 with the text at https://pastebin.com/p4TKSX3R. The original text couldn't be submitted because bugzilla thought it was spam. Removing the UNIX socket IDs output by strace -yy, which, if you squint at them right and tilt your head, might look like HTML, I was able to submit the bug report. Perhaps the spam detector can be tuned to allow strace -yy output to be posted?
*** This bug has been marked as a duplicate of bug 424271 ***