In Isospin (Linux distribution), "gitstatusd failed to initialize": hangs on mkfifo

Thanks for a great shell setup with powerlevel10k and gitstatusd 👏

I've used it successfully on my Mac for ages, but starting to use my dotfiles on Linux machines, my shell hangs indefinitely sometimes when opening a new shell. If I press Ctrl+C to interrupt it, I get this error:

  [ERROR]: gitstatus failed to initialize.


  Zsh log (/tmp/spin/gitstatus.POWERLEVEL9K.1000.110281.1712129070.1.xtrace.log):

    +(anon):7> setopt monitor
    +(anon):9> ((  ! _GITSTATUS_STATE_POWERLEVEL9K  ))
    +(anon):10> [[ -r /proc/version && 'Linux version 6.5.0-1016-gcp (buildd@lcy02-amd64-061) (x86_64-linux-gnu-gcc-12 (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #16~22.04.1-Ubuntu SMP Sat Mar  9 00:58:37 UTC 2024' == *Microsoft* ]]
    +(anon):13> print -rn
    +(anon):14> zsystem flock -f lock_fd /tmp/spin/gitstatus.POWERLEVEL9K.1000.110281.1712129070.1.lock
    +(anon):15> [[ 15 == <1-> ]]
    +(anon):18> typeset -gi '_GITSTATUS_LOCK_FD_POWERLEVEL9K=lock_fd'
    +(anon):20> [[ linux-gnu == cygwin* ]]
    +(anon):41> sysopen -r -o cloexec -u resp_fd /proc/self/fd/14
    +(anon):44> typeset -gi 'GITSTATUS_DAEMON_PID_POWERLEVEL9K=110418'
    +(anon):41> _gitstatus_daemon_p9k_
    +(anon):46> [[ 17 == <1-> ]]
    +(anon):47> typeset -gi '_GITSTATUS_RESP_FD_POWERLEVEL9K=resp_fd'
    +_gitstatus_daemon_p9k_:1> local -i pipe_fd
    +(anon):48> typeset -gi '_GITSTATUS_STATE_POWERLEVEL9K=1'
    +(anon):51> ((  ! async  ))
    +(anon):7> setopt monitor
    +(anon):9> ((  ! _GITSTATUS_STATE_POWERLEVEL9K  ))
    +(anon):51> ((  ! async  ))
    +(anon):52> ((  _GITSTATUS_CLIENT_PID_POWERLEVEL9K == sysparams[pid]  ))
    +(anon):54> local pgid
    +(anon):55> ((  0 < 20  ))
    +(anon):56> [[ -t 17 ]]
    +(anon):57> sysread -s 20 -t 10.0000000000 -i 17 'pgid[$#pgid+1]'
    +(anon):55> ((  20 < 20  ))
    +(anon):59> [[ '              110418' == \ #<1-> ]]
    +(anon):60> typeset -gi 'GITSTATUS_DAEMON_PID_POWERLEVEL9K=pgid'
    +(anon):62> sysopen -w -o cloexec -u req_fd -- /tmp/spin/gitstatus.POWERLEVEL9K.1000.110281.1712129070.1.fifo
    +(anon):62> return 130
    (anon):sysopen:62: can't open file /tmp/spin/gitstatus.POWERLEVEL9K.1000.110281.1712129070.1.fifo: interrupt

  Daemon log (/tmp/spin/gitstatus.POWERLEVEL9K.1000.110281.1712129070.1.daemon.log):

    +_gitstatus_daemon_p9k_:3> local pgid=110418
    +_gitstatus_daemon_p9k_:4> [[ 110418 == <1-> ]]
    +_gitstatus_daemon_p9k_:5> cd -q /
    +_gitstatus_daemon_p9k_:90> ((  lock_fd == -1  ))
    +_gitstatus_daemon_p9k_:9> trap '' PIPE
    +_gitstatus_daemon_p9k_:11> local uname_sm
    +_gitstatus_daemon_p9k_:93> zsystem flock -- /tmp/spin/gitstatus.POWERLEVEL9K.1000.110281.1712129070.1.lock
    +_gitstatus_daemon_p9k_:12> uname_sm=+_gitstatus_daemon_p9k_:12> uname -sm
    +_gitstatus_daemon_p9k_:12> uname_sm='linux x86_64' 
    +_gitstatus_daemon_p9k_:13> [[ 'linux x86_64' == [^\ ]##\ [^\ ]## ]]
    +_gitstatus_daemon_p9k_:14> local uname_s=linux
    +_gitstatus_daemon_p9k_:15> local uname_m=x86_64
    +_gitstatus_daemon_p9k_:17> [[ '' == <1-> ]]
    +_gitstatus_daemon_p9k_:20> local cpus
    +_gitstatus_daemon_p9k_:21> ((  ! 1  ))
    +_gitstatus_daemon_p9k_:21> [[ linux == linux ]]
    +_gitstatus_daemon_p9k_:23> ((  ! 1  ))
    +_gitstatus_daemon_p9k_:23> cpus=+_gitstatus_daemon_p9k_:23> getconf _NPROCESSORS_ONLN
    +_gitstatus_daemon_p9k_:23> cpus=8 
    +_gitstatus_daemon_p9k_:27> args+=( -t 16 ) 
    +_gitstatus_daemon_p9k_:30> mkfifo -- /tmp/spin/gitstatus.POWERLEVEL9K.1000.110281.1712129070.1.fifo
    +_gitstatus_daemon_p9k_:31> print -rnu 14 -- '              110418'

  System information:

    zsh:      5.8.1
    uname -a: Linux spin 6.5.0-1016-gcp #16~22.04.1-Ubuntu SMP Sat Mar  9 00:58:37 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Seems that it was waiting for mkfifo, or more so, the act of writing to the pipe is blocking. Any tips for further troubleshooting?

Start by reproducing the hang on Linux with the reported zsh 5.8.1 environment, then inspect the gitstatus daemon initialization around mkfifo and the client’s write to the FIFO. Use the client and daemon logs to determine why initialization blocks; done means a new shell starts without hanging or reporting that gitstatus failed to initialize.