Notice: Trying to access array offset on value of type null in Plugin_Command.php on line 662

[rilwis]

Bug Report

• [x] Yes, I reviewed the contribution guidelines.
• [x] Yes, more specifically, I reviewed the guidelines on how to write clear bug reports.

When I run wp plugin update --all on my localhost on Mac, I see the following notices:

Notice: Trying to access array offset on value of type null in phar:///usr/local/Cellar/wp-cli/2.4.0/bin/wp/vendor/wp-cli/extension-command/src/Plugin_Command.php on line 662
Notice: Trying to access array offset on value of type null in phar:///usr/local/Cellar/wp-cli/2.4.0/bin/wp/vendor/wp-cli/extension-command/src/Plugin_Command.php on line 663

There was only 1 update for Gutenberg at that time. Despite the notices, the update process still work well.

Environment

OS:     Darwin 18.2.0 Darwin Kernel Version 18.2.0: Mon Nov 12 20:24:46 PST 2018; root:xnu-4903.231.4~2/RELEASE_X86_64 x86_64
Shell:  /bin/bash
PHP binary:     /usr/local/Cellar/php/7.4.3/bin/php
PHP version:    7.4.3
php.ini used:   /usr/local/etc/php/7.4/php.ini
WP-CLI root dir:        phar://wp-cli.phar/vendor/wp-cli/wp-cli
WP-CLI vendor dir:      phar://wp-cli.phar/vendor
WP_CLI phar path:       /Library/WebServer/Documents/themedemos/wp-content/themes
WP-CLI packages dir:
WP-CLI global config:
WP-CLI project config:
WP-CLI version: 2.4.0

I installed wp-cli via brew on Mac, here is the output of brew list:

apr             freetds         jemalloc        libsodium       msgpack         php             utf8proc
apr-util        freetype        jpeg            libssh2         nghttp2         python          webp
argon2          gdbm            libev           libtiff         node            readline        wp-cli
aspell          gettext         libevent        libtool         oniguruma       rtmpdump        xz
autoconf        glib            libffi          libzip          openldap        sqlite
brotli          gmp             libidn          lz4             openssl         subversion
c-ares          groonga         libmetalink     mariadb         [email protected]     tidy-html5
composer        icu4c           libpng          mecab           pcre            tig
curl-openssl    jansson         libpq           mecab-ipadic    perl            unixodbc

I use built-in PHP + Apache on Mac.