Magento2: Customer with empty "Date of Birth" cannot be saved

[JanisE]

Customer with empty "Date of Birth" cannot be saved even when it is not marked (or checked on the JS side) as mandatory.

I didn't know how to re-open issue #11989 so I'm creating a new one. Now, I'm installing the latest Magento version (2.2.1), which has the same problem. The PHP version might be important (as pointed out by @Blatant at https://github.com/magento/magento2/issues/11989#issuecomment-342798206), it's 7.1.11, although I got the error with 7.1.7, too, previously.

I've also prepared an automated way of setting up the environment and installing Magento by Docker: https://github.com/JanisE/magento_test_1 Use it, please, if you cannot reproduce the bug in your test environments.

Preconditions

1. OS: Linux Mint 18.2 (based on Ubuntu Xenial).
2. PHP 7.1.11
3. Magento CE 2.2.1 without sample data is installed by Composer.

Steps to reproduce

1. Sign up as a new user entering whatever name, e-mail, password.
2. In Admin go to Stores -> Customers -> All customers and click "Edit" for the created customer.
3. Go to "Account Information" and change "Group" from "General" to "Reseller".
4. Click "Save Customer".

Expected result

1. Either the customer gets saved
2. Or
   2.1. Account Information -> "Date of Birth" field is marked as mandatory;
   2.2. "This is a required field." appears beneath "Date of Birth" if it is empty when saving.

Actual result

1. The page reloads with an error message "Something went wrong while saving the customer.".
2. An error message gets logged in the "system.log" starting with main.CRITICAL: Exception message: Warning: A non-numeric value encountered in/var/www/html/magento/vendor/magento/zendframework1/library/Zend/Locale/Math/PhpMath.php on line 94

[okorshenko]

The issue has been fixed in 2.2-develop branch

[spectravp]

When updating Magento via composer to version 2.2.3, it installs magento/framework (101.0.3) which does NOT contain the fix for this issue. Have tried completely removing all composer installed components and reinstalling, same result.

If I download the latest tarball from https://magento.com/tech-resources/download the above fixes are not present.

Has this change not been merged into a release?

[magento-engcom-team]

Hi @JanisE. Thank you for your report.
The issue has been fixed in magento/magento2#14666 by @rostyslav-hymon in 2.3-develop branch
Related commit(s):

• 4801d7486e16f200beede7a9afddb0d23cc1ec51

The fix will be available with the upcoming 2.3.0 release.

[developer-vtnetzwelt]

I am also facing the same issue on version - 2.2.3. On php-7.0.30 its working fine and on php-7.1.20 its giving same issue - "Warning: A non-numeric value encountered in /home/www-data/staging.risch-shoes.com/vendor/magento/zendframework1/library/Zend/Locale/Math/PhpMath.php on line 94"