Address Completion No Longer Working

[david wen riccardi-zhu]

Address completion worked out of the box for me with notmuch and 
Emacs. Recently, it's stopped working. I've tried setting 
notmuch-address-command to internal, as well as toggling 
notmuch-address-toggle-internal-completion, but neither has been 
able to return the functionality.

I am able to get notmuch address to work on the command line.

I use:
Arch Linux X86-64, Kernel 4.15.7-1-ARCH
fish shell
notmuch 0.26
Emacs 25.3.1
company-mode

Any insights on how I might get autocompletion working again?
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dwrz|朱为文