Lisp error: (void-function s-match)

[sjLambda]

Debugger entered--Lisp error: (void-function s-match)
s-match("^\[\[\(http.+?\)\]\[\(.+?\)\]\]" "http://emacs.stackexchange.com/feeds")
#f(compiled-function (headline) #<bytecode -0x1914c60a3964407a>)(("http://emacs.stackexchange.com/feeds" emacs stackexchange))
mapcar(#f(compiled-function (headline) #<bytecode -0x1914c60a3964407a>) (("http://emacs.stackexchange.com/feeds" emacs stackexchange)
/snip ...
all items from elfeed.org appear here, snipped for brevity
.../snip
apply(rmh-elfeed-org-process-advice nil)
elfeed()
funcall-interactively(elfeed)
call-interactively(elfeed nil nil)
command-execute(elfeed)

versions:
elfeed 3.4.1
emacs: latest truck complied from Savannah sources
M-x version: GNU Emacs 30.0.50 (build 1, x86_64-apple-darwin17.7.0, NS appkit-1561.61 Version 10.13.6

[skeeto]

This is a bug in remyhonig/elfeed-org@3438d07, committed last week. See remyhonig/elfeed-org#83.