sway: swaynag: infinite loop on POLLHUP

• Sway Version: sway version 1.4-b34c198f (Mar 22 2020, branch ‘master’)

• OS: Archlinux / wayland 1.18.0-1

• Debug Log: Sway had not been started in with debug logging

• Configuration File: https://github.com/jfchevrette/dotfiles/blob/master/sway/.config/sway/config

• Stack Trace, if sway crashes: I ran strace on the running swaynag process and all there was was the following line repeated thousands of times per second over and over

1392818 poll([{fd=298, events=POLLIN}], 1, -1) = 1 ([{fd=298, revents=POLLIN|POLLHUP}])
1392818 poll([{fd=298, events=POLLIN}], 1, -1) = 1 ([{fd=298, revents=POLLIN|POLLHUP}])
1392818 poll([{fd=298, events=POLLIN}], 1, -1) = 1 ([{fd=298, revents=POLLIN|POLLHUP}])

• Steps that lead to the problem:
  • Introduced an error in my config
  • Hit $mod-shift-r to run the reload command.
  • sway reloaded and presented the typical message saying there is an error in the config at the top of the screen
  • Clicked the Toggle details button to show actual error
  • Fixed the error in my sway config
  • Hit $mod-shift-r to run the reload command (without first closing the swaynag bar)
  • Went on with my day. Then about 45 min later, noticed my computer was becoming super slow. Looked at top and noticed swaynag was using 100% of a single code, and over 30GB of memory + swap. See below screenshot