[Bug]: TypeError when installing skeleton v2024.3

[kmpm]

Expected behavior

Running composer create-project with pimcore/skeleton should provide me with a folder where an installation of pimcore exists.

Actual behavior

$ COMPOSER_MEMORY_LIMIT=-1 composer create-project pimcore/skeleton my-skeleton
Creating a "pimcore/skeleton" project at "./my-skeleton"
Installing pimcore/skeleton (v2024.3.0)
  - Installing pimcore/skeleton (v2024.3.0): Extracting archive
Created project in /opt/pimcore/my-skeleton
Loading composer repositories with package information
Updating dependencies

In Problem.php line 652:

  [TypeError]
  substr(): Argument #1 ($string) must be of type string, null given


Exception trace:
  at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/Problem.php:652
 substr() at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/Problem.php:652
 Composer\DependencyResolver\Problem::Composer\DependencyResolver\{closure}() at n/a:n/a
 array_map() at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/Problem.php:651
 Composer\DependencyResolver\Problem::getProvidersList() at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/Problem.php:281
 Composer\DependencyResolver\Problem::getMissingPackageReason() at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/Rule.php:324
 Composer\DependencyResolver\Rule->getPrettyString() at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/Problem.php:168
 Composer\DependencyResolver\Problem::formatDeduplicatedRules() at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/Problem.php:111
 Composer\DependencyResolver\Problem->getPrettyString() at phar:///usr/local/bin/composer/src/Composer/DependencyResolver/SolverProblemsException.php:52
 Composer\DependencyResolver\SolverProblemsException->getPrettyString() at phar:///usr/local/bin/composer/src/Composer/Installer.php:513
 Composer\Installer->doUpdate() at phar:///usr/local/bin/composer/src/Composer/Installer.php:298
 Composer\Installer->run() at phar:///usr/local/bin/composer/src/Composer/Command/CreateProjectCommand.php:263
 Composer\Command\CreateProjectCommand->installProject() at phar:///usr/local/bin/composer/src/Composer/Command/CreateProjectCommand.php:153
 Composer\Command\CreateProjectCommand->execute() at phar:///usr/local/bin/composer/vendor/symfony/console/Command/Command.php:298
 Symfony\Component\Console\Command\Command->run() at phar:///usr/local/bin/composer/vendor/symfony/console/Application.php:1040
 Symfony\Component\Console\Application->doRunCommand() at phar:///usr/local/bin/composer/vendor/symfony/console/Application.php:301
 Symfony\Component\Console\Application->doRun() at phar:///usr/local/bin/composer/src/Composer/Console/Application.php:407
 Composer\Console\Application->doRun() at phar:///usr/local/bin/composer/vendor/symfony/console/Application.php:171
 Symfony\Component\Console\Application->run() at phar:///usr/local/bin/composer/src/Composer/Console/Application.php:147
 Composer\Console\Application->run() at phar:///usr/local/bin/composer/bin/composer:93
 require() at /usr/local/bin/composer:29

create-project [-s|--stability STABILITY] [--prefer-source] [--prefer-dist] [--prefer-install PREFER-INSTALL] [--repository REPOSITORY] [--repository-url REPOSITORY-URL] [--add-repository] [--dev] [--no-dev] [--no-custom-installers] [--no-scripts] [--no-progress] [--no-secure-http] [--keep-vcs] [--remove-vcs] [--no-install] [--no-audit] [--audit-format AUDIT-FORMAT] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--ask] [--] [<package> [<directory> [<version>]]]

Steps to reproduce

On a ubuntu 24.04.1 (where pimcore/demo works).

• Run COMPOSER_MEMORY_LIMIT=-1 composer create-project pimcore/skeleton my-skeleton

[cngJo]

This is probably related to composer/composer#12156
I was able to fix this by downgrading to the latest 2.7.9 version of composer

[br33f]

This issue seems to occur in Composer versions 2.8.0 and 2.8.1, while version 2.7.9 works correctly.

After updating composer to version 2.7.9:
composer self-update 2.7.9

And then running
composer install

The installation proceeds correctly on my end.

[kmpm]

Works with 2.7.9. And it seems that a update to Composer will fix it later on so I close this issue