After compiling elc files for mu4e in /usr/local/share/emacs/site-lisp/mu4e (Ubuntu 20.04) with

sudo emacs -Q -batch -L . -f batch-native-compile *.el

I get this error when writing an address of the To: field

Company: backend company-capf error "Symbol’s function definition is void: start" with args (prefix)

Prior to elc compiling mu4e everything worked alright. So I guess some bits of the config are out of sync now. Grateful for any tips.

(Note that in mu4e address auto-completion is enabled by default, i.e., mu4e-compose-complete-addresses is set to true)

I'm using mu4e 1.5.11 on Emacs 28.0.50 with native compilation.

1 Answer 1


Issue solved when I build Emacs from the branch mentioned here:


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