I get this error when I only have the following in my .emacs:

(setq debug-on-signal t)
(setq debug-on-error t)
(server-start)

Gábor <hajovonta@gmail.com> ezt írta (időpont: 2020. okt. 13., K, 9:30):

I moved it to the top of my config, then I get the following error on startup:

Debugger entered--Lisp error: (void-variable server-use-tcp)
  default-toplevel-value(server-use-tcp)
  custom-initialize-reset(server-use-tcp (funcall #'#f(compiled-function () #<bytecode 0x1e0000171e91>)))
  custom-declare-variable(server-use-tcp (funcall #'#f(compiled-function () #<bytecode 0x1e0000171e91>)) "If non-nil, use TCP sockets instead of local socke..." :set #f(compiled-function (sym val) #<bytecode 0xecd269cdbfc6f97>) :type boolean :version "22.1")
  byte-code("\300\301\302\303\304\305%\210\306\307\310\311\312DD\313\314\315\316\317\320\321&\11\210\306\322\310\311\323DD\324\316\325\320\321&\7\210\326\322\327\330#\210\306\331\310\311..." [custom-declare-group server nil "Emacs running as a server process." :group external custom-declare-variable server-use-tcp funcall function #f(compiled-function () #<bytecode 0x1e0000171e91>) "If non-nil, use TCP sockets instead of local socke..." :set #f(compiled-function (sym val) #<bytecode 0xecd269cdbfc6f97>) :type boolean :version "22.1" server-host #f(compiled-function () #<bytecode 0x1e0000171e91>) "The name or IP address to use as host address of t..." (choice (string :tag "Name or IP address") (const :tag "Local" nil)) put risky-local-variable t server-port #f(compiled-function () #<bytecode 0x1e0000171e91>) "The port number that the server process should lis..." (choice (string :tag "Port number") (const :tag "Random" nil)) "24.1" server-auth-dir #f(compiled-function () #<bytecode 0xae5c6d90276fe>) "Directory for server authentication files.\nWe only..." directory server-auth-key #f(compiled-function () #<bytecode 0x1e0000171e91>) "Server authentication key.\nThis is only used if `s..." (choice (const :tag "Random" nil) (string :tag "Password")) "24.3" server-raise-frame #f(compiled-function () #<bytecode 0x1e0000171e5d>) "If non-nil, raise frame when switching to a buffer..." server-visit-hook #f(compiled-function () #<bytecode 0x1e0000171e91>) "Hook run when visiting a file for the Emacs server..." hook server-switch-hook #f(compiled-function () #<bytecode 0x1e0000171e91>) "Hook run when switching to a buffer for the Emacs ..." server-after-make-frame-hook ...] 10)
  (server-start)
  eval-buffer(#<buffer  *load*> nil "/home/username/.emacs" nil t)  ; Reading at buffer position 216
  load-with-code-conversion("/home/username/.emacs" "/home/username/.emacs" t t)
  load("~/.emacs" noerror nomessage)
  startup--load-user-init-file(#f(compiled-function () #<bytecode 0xcee8b0bce81ba0f>) #f(compiled-function () #<bytecode 0x81a386fa1b1b513>) t)
  command-line()
  normal-top-level()

Gábor <hajovonta@gmail.com> ezt írta (időpont: 2020. okt. 13., K, 9:17):

I set them both to t, now I have the following error on startup:

Debugger entered--Lisp error: (file-missing "make client process failed" "No such file or directory" :name "server-client-test" :family local :server nil :noquery t :service "/run/user/1000/emacs/server")
  make-network-process(:name "server-client-test" :family local :server nil :noquery t :service "/run/user/1000/emacs/server")
  server-running-p("server")
  server-start()
  eval-buffer(#<buffer  *load*> nil "/home/username/.emacs" nil t)  ; Reading at buffer position 27778
  load-with-code-conversion("/home/username/.emacs" "/home/username/.emacs" t t)
  load("~/.emacs" noerror nomessage)
  startup--load-user-init-file(#f(compiled-function () #<bytecode 0xed8d667e6160a0f>) #f(compiled-function () #<bytecode 0x81a386fa1b1b513>) t)
  command-line()
  normal-top-level()

Eli Zaretskii <eliz@gnu.org> ezt írta (időpont: 2020. okt. 12., H, 16:50):

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: Gábor <hajovonta@gmail.com>,  larsi@gnus.org,
>   npostavs@gmail.com,
>   43888@debbugs.gnu.org
> Date: Mon, 12 Oct 2020 07:58:27 +0200
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > > *ERROR*: Wrong number of arguments: (1 . 4), 5
>
> > But since with "emacs -Q" it does work, it is still some of your
> > customizations that are the prime suspect.
>
> Is there a way for the user to get an error message more verbose than
> above?

Yes, make sure debug-on-signal and debug-on-error are both non-nil in
the Emacs that runs the server, then you will have the backtrace pop
up in Emacs.  Assuming there's some frame visible for the server, that
is.