`composer require` rejects `self.version` as version constraint

[PhrozenByte]

My composer.json:

{"name":"composer/hello-world","version":"1.0.0"}

Output of composer diagnose:

Checking composer.json: WARNING
No license specified, it is recommended to do so. For closed-source software you may use "proprietary" as license.
The version field is present, it is recommended to leave it out if the package is published on Packagist.
Checking platform settings: OK
Checking git settings: OK
Checking http connectivity to packagist: OK
Checking https connectivity to packagist: OK
Checking github.com oauth access: OK
Checking disk free space: OK
Checking pubkeys: 
Tags Public Key Fingerprint: 57815BA2 7E54DC31 7ECC7CC5 573090D0  87719BA6 8F3BB723 4E5D42D0 84A14642
Dev Public Key Fingerprint: 4AC45767 E5EC2265 2F0C1167 CBBB8A2B  0C708369 153E328C AD90147D AFE50952
OK
Checking composer version: OK
Composer version: 2.2.7
PHP version: 7.2.24
PHP binary path: /usr/bin/php7.2
OpenSSL version: OpenSSL 1.1.1  11 Sep 2018
cURL version: 7.58.0 libz 1.2.11 ssl OpenSSL/1.1.1
zip: extension present, unzip present, 7-Zip present (7z)

When I run this command:

composer require -vvv 'psr/log self.version'

I get the following output:

Running 2.2.7 (2022-02-25 11:12:27) with PHP 7.2.24-0ubuntu0.18.04.11 on Linux / 5.4.0-97-generic
Reading ./composer.json (/tmp/tmp.naPyUDx5l9/composer.json)
Loading config file /home/daniel/.config/composer/config.json
Loading config file /home/daniel/.config/composer/auth.json
Loading config file ./composer.json (/tmp/tmp.naPyUDx5l9/composer.json)
Checked CA file /etc/pki/tls/certs/ca-bundle.crt does not exist or it is not a file.
Checked directory /etc/pki/tls/certs/ca-bundle.crt does not exist or it is not a directory.
Checked CA file /etc/ssl/certs/ca-certificates.crt: valid
Failed to initialize global composer: Composer could not find the config file: /home/daniel/.config/composer/composer.json


                                                                                          
  [UnexpectedValueException]                                                              
  Could not parse version constraint self.version: Invalid version string "self.version"  
                                                                                          

Exception trace:
 () at phar:///usr/local/bin/composer2/vendor/composer/semver/src/VersionParser.php:519
 Composer\Semver\VersionParser->parseConstraint() at phar:///usr/local/bin/composer2/vendor/composer/semver/src/VersionParser.php:274
 Composer\Semver\VersionParser->parseConstraints() at phar:///usr/local/bin/composer2/src/Composer/Package/Version/VersionParser.php:34
 Composer\Package\Version\VersionParser->parseConstraints() at phar:///usr/local/bin/composer2/src/Composer/Command/RequireCommand.php:228
 Composer\Command\RequireCommand->execute() at phar:///usr/local/bin/composer2/vendor/symfony/console/Command/Command.php:245
 Symfony\Component\Console\Command\Command->run() at phar:///usr/local/bin/composer2/vendor/symfony/console/Application.php:835
 Symfony\Component\Console\Application->doRunCommand() at phar:///usr/local/bin/composer2/vendor/symfony/console/Application.php:185
 Symfony\Component\Console\Application->doRun() at phar:///usr/local/bin/composer2/src/Composer/Console/Application.php:336
 Composer\Console\Application->doRun() at phar:///usr/local/bin/composer2/vendor/symfony/console/Application.php:117
 Symfony\Component\Console\Application->run() at phar:///usr/local/bin/composer2/src/Composer/Console/Application.php:131
 Composer\Console\Application->run() at phar:///usr/local/bin/composer2/bin/composer:83
 require() at /usr/local/bin/composer2:29

require [--dev] [--dry-run] [--prefer-source] [--prefer-dist] [--prefer-install PREFER-INSTALL] [--fixed] [--no-suggest] [--no-progress] [--no-update] [--no-install] [--update-no-dev] [-w|--update-with-dependencies] [-W|--update-with-all-dependencies] [--with-dependencies] [--with-all-dependencies] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [--] [<packages>]...

And I expected this to happen:

self.version is a valid version constraint that works just fine for composer install, composer update, and others. Manually adding {"require":{"psr/log":"self.version"}} to composer.json and running composer update installs psr/log as of v1.0.0, just as expected. self.version is also rejected by composer require --no-update.