GitLab

grep was interpreting the variables as regexes intended to
match themselves. this could cause errors or false positives/negatives if the
variables contain regex metacharacters. now the variables are escaped to
produce regexes that will always and only match themselves.
Signed-off-by: Geoffrey Métais <geoffrey.metais@gmail.com>

You need to delete your vlc/ folder to make the change effective.
Or at lease change origin to https://git.videolan.org/git/vlc/vlc-3.0.git