Composer 2x: Composer\DependencyResolver\SolverBugException

[mxr576]

I tried to update an existing site installed with "drupal/core": "^8.8.0" "drupal/core-dev": "^8.8.0", to Drupal 9 when I bumped into this issue.

My composer.json:

{
    "name": "drupal-composer/drupal-project",
    "description": "Project template for Drupal 8 projects with composer",
    "type": "project",
    "license": "GPL-2.0-or-later",
    "authors": [
        {
            "name": "",
            "role": ""
        }
    ],
    "repositories": [
        {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        },
        {
            "type": "vcs",
            "url": "https://github.com/mxr576/composer-patches.git"
        }
    ],
    "require": {
        "php": ">=7.4",
        "composer/installers": "^1.2",
        "drupal/core": "^8.8.0 || ^9.0",
        "drupal/core-composer-scaffold": "^8.8.0",
        "drush/drush": "^9.7.1 | ^10.0.0",
        "mxr576/composer-patches": "^1.100",
        "vlucas/phpdotenv": "^4.0",
        "webflo/drupal-finder": "^1.0.0"
    },
    "require-dev": {
        "drupal/coder": "^8.3",
        "drupal/core-dev": "^8.8.0 || ^9.0",
        "pronovix/drupal-qa": "^2.8"
    },
    "conflict": {
        "drupal/drupal": "*"
    },
    "minimum-stability": "dev",
    "prefer-stable": true,
    "config": {
        "sort-packages": true
    },
    "autoload": {
        "classmap": [
            "scripts/composer/ScriptHandler.php"
        ],
        "files": ["load.environment.php"]
    },
    "scripts": {
        "pre-install-cmd": [
            "DrupalProject\\composer\\ScriptHandler::checkComposerVersion"
        ],
        "pre-update-cmd": [
            "DrupalProject\\composer\\ScriptHandler::checkComposerVersion"
        ],
        "post-install-cmd": [
            "DrupalProject\\composer\\ScriptHandler::createRequiredFiles"
        ],
        "post-update-cmd": [
            "DrupalProject\\composer\\ScriptHandler::createRequiredFiles"
        ]
    },
    "extra": {
        "composer-exit-on-patch-failure": true,
        "patchLevel": {
            "drupal/core": "-p2"
        },
        "drupal-scaffold": {
            "locations": {
                "web-root": "web/"
            }
        },
        "enable-patching": true,
        "patches": {
            "drupal/core": {
                "foo": "https://www.drupal.org/files/issues/2020-07-22/content_moderation-support-view-any-unpublished-entity-type-permission-3160748-3.patch"
            }
        },
        "installer-paths": {
            "web/core": ["type:drupal-core"],
            "web/libraries/{$name}": ["type:drupal-library"],
            "web/modules/contrib/{$name}": ["type:drupal-module"],
            "web/profiles/contrib/{$name}": ["type:drupal-profile"],
            "web/themes/contrib/{$name}": ["type:drupal-theme"],
            "drush/Commands/contrib/{$name}": ["type:drupal-drush"]
        }
    }
}

Output of composer diagnose:

Checking composer.json: OK
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: FAIL
Missing pubkey for tags verification
Missing pubkey for dev verification
Run composer self-update --update-keys to set them up
Checking composer version: You are not running the latest stable version, run `composer self-update` to update (2.0.0-alpha2 => 1.10.9)
Composer version: 2.0.0-alpha2
PHP version: 7.4.4
PHP binary path: /usr/local/bin/php
OpenSSL version: OpenSSL 1.1.1d  10 Sep 2019

When I run this command:

composer update drupal/core-dev drupal/core --with-dependencies --ignore-platform-reqs

I get the following output:

The "dealerdirect/phpcodesniffer-composer-installer" plugin was skipped because it requires a Plugin API version ("^1.0") that does not match your Composer installation ("2.0.0"). You may need to run composer update with the "--no-plugins" option.
The "pronovix/drupal-qa" plugin was skipped because it requires a Plugin API version ("^1.1") that does not match your Composer installation ("2.0.0"). You may need to run composer update with the "--no-plugins" option.
Gathering patches for root package.
> DrupalProject\composer\ScriptHandler::checkComposerVersion
Loading composer repositories with package information
Updating dependencies                                                                                                                  Dependency "drupal/coder" is also a root requirement. Package has not been listed as an update argument, so keeping locked at old version. Use --with-all-dependencies to include root dependencies.
Dependency "composer/installers" is also a root requirement. Package has not been listed as an update argument, so keeping locked at old version. Use --with-all-dependencies to include root dependencies.

                                                                                                                                                           
  [Composer\DependencyResolver\SolverBugException]                                                                                                         
  Reached invalid decision id 0 while looking through (113) for a literal present in the analyzed rule (-113|8610|8611|8612|8613|8614|8615|8616|8617|8618  
  |8619|8620|8621|8622|8623|8624|8694|8695|8696|8697|8698|8699|8700|8701|8702|8703|8704|8705|8706|8707|8708|8709|8710|8711|8712|8713|8714|8715|8716|8717|  
  8718|8719|8720|8721|8722|8723|8724|8725|8726|8727|8728|8729|8730|8731|8732|8733|8734|8735|8736|8737|8738|8739|8740|8741|8742|8743|8744|8745|8746|8747|8  
  748|8749|8750|8751|8752|8753|8754|8755|8756|8757|8758|8759|8760|8761|8762|8763|8764|8765|8766|8767|8768|8769|8770|8771|8772|8773|8774|8775|8776|8777|87  
  78|8779|8780|8781|8782|8783|8784|8785|8786|8787|8788|8789|8790|8791|8792|8793|8794|8795|8796|8797|8798|8799|8800|8801|8802|8803|8804|8805|8806|8807|880  
  8|8809|8810|8811|8812|8813|8814|8815|8816|8817|8818|8819|8820|8821|8822|8823|8824|8825|8826|8827|8828|8829|8830|8831|8832|8833|8834|8835|8836|8837|8838  
  |8839|8840|8841|8842|8843|8844|8845|8846|8847|8848|8849|8850|8851|8852|8853|8854|8855|8856|8857|8858|8859|8860|8861|8862|8863|8864|8865|8866|8867|8868|  
  8869|8870|8871|8872|8873|8874|8875|8876|8877|8878|8879|8880|8881|8882|8883|8884|8885|8886|8887|8888|8889|8890|8891|8892|8893|8894|8895|8896|8897|8898|8  
  899|8900|8901|8902|8903|8904|8905|8906|8907|8908|8909|8910|8911|8912|8913|8914|8915|8916|8917|8918|8919|8920|8921|8922|8923|8924|8925|8926|8927|8928|89  
  29|8930|8931|8932|8933|8934|8935|8936|8937|8938|8939|8940|8941|8942|8943|8944|8945|11055|11060|11061|11062|11063|11064|11065|11066|11067|11068).         
  This exception was most likely caused by a bug in Composer.                                                                                              
  Please report the command you ran, the exact error you received, and your composer.json on https://github.com/composer/composer/issues - thank you!      
                                                                                                                                                           

update [--with WITH] [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--lock] [--no-install] [--no-autoloader] [--no-scripts] [--no-suggest] [--no-progress] [--with-dependencies] [--with-all-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [-i|--interactive] [--root-reqs] [--] [<packages>]...

[mxr576]

Related: #9067

[jimrome]

I got this also

[jimrome]

And this prevents rollback from working. I had to reinstall composer 1
`[~/www]# composer self-update --rollback

Fatal error: Uncaught Error: Undefined class constant 'PRE_DEPENDENCIES_SOLVING' in /home/stelnews/public_html/vendor/wikimedia/composer-merge-plugin/src/MergePlugin.php:159
Stack trace:
#0 phar:///home/stelnews/public_html/composer/src/Composer/EventDispatcher/EventDispatcher.php(376): Wikimedia\Composer\MergePlugin::getSubscribedEvents()
#1 phar:///home/stelnews/public_html/composer/src/Composer/Plugin/PluginManager.php(315): Composer\EventDispatcher\EventDispatcher->addSubscriber(Object(Wikimedia\Composer\MergePlugin))
#2 phar:///home/stelnews/public_html/composer/src/Composer/Plugin/PluginManager.php(216): Composer\Plugin\PluginManager->addPlugin(Object(Wikimedia\Composer\MergePlugin))
#3 phar:///home/stelnews/public_html/composer/src/Composer/Plugin/PluginManager.php(379): Composer\Plugin\PluginManager->registerPackage(Object(Composer\Package\CompletePackage))
#4 phar:///home/stelnews/public_html/composer/src/Composer/Plugin/PluginManager.php(85): Composer\Plugin\PluginManager->loadRepository(Object(Composer\Reposito in /home/stelnews/public_html/vendor/wikimedia/composer-merge-plugin/src/MergePlugin.php on line 159`

[Seldaek]

@jimrome this is an unrelated issue IMO. Please report it in the composer-merge-plugin repo, it seems like they should use defined() to check for the PRE_DEPENDENCIES_SOLVING constant existing before assuming it does. Or maybe you still had the old version of the plugin which does not support composer 2? I'm not sure.

[jimrome]

Where do I do this? I'll be glad to.

[Seldaek]

At https://github.com/wikimedia/composer-merge-plugin/issues - but it seems wikimedia/composer-merge-plugin#184 is already tracking this issue.

[Seldaek]

This has now been fixed. You can try with the latest snapshot (composer self-update --snapshot) if you'd like to confirm.