Database password that starts with "@" triggers "InvalidArgumentException"

[transopticmedia]

Description

I updated Craft today to the latest version (3.1.3), and started to get an "internal error" when going to settings->assets or settings->email. The error message in the logs was:

_yii\base\InvalidArgumentException: Invalid path alias: @L)o95Pqw5&=_

( eventually, I realized "@l)o95Pqw5&=" was the DB password set in .env)

The error line was: /vendor/yiisoft/yii2/BaseYii.php:154

It was easy to fix it by changing the password, but it took a while to figure out what was happening. I had the password set to that for several weeks with no issues until the update.

Steps to reproduce

1. Set your database pw to begin with "@"

Additional info

• Craft version: 3.1.3
• PHP version: 7.2
• Database driver & version:
• Plugins & versions:

[brandonkelly]

Thanks for reporting! Fixed for the next release.