ErrLookup › composer/composer
composer/composer
Dependency Manager for PHP · PHP · 310 source files
Analyzed at c435d285c9 on 2026-08-07. 441 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| Package exists in and which has a higher repository… | exception | error | package-discovery, repository-priority, minimum-stability, canonical, require-command |
| Could not determine the location of the composer.phar file… | console | error | cli, self-update, phar, installation |
| The required git reference for '.$package->getName().' is… | exception | error | network, git, cache, offline, environment |
| Package has requirements incompatible with your PHP… | exception | error | package-discovery, platform-requirements, php-version, extensions, require-command |
| Composer detected issues in your platform | exception | critical | autoload, platform-check, runtime, php-version, extensions, deployment |
| Could not find package | exception | error | package-discovery, platform-requirements, php-version, extensions, minimum-stability, require-command |
| Error Output | exception | error | scripts, event-dispatcher, composer-alias, process-executor |
| Unknown installer type | exception | error | installer, package-type, plugin, configuration |
| The .fslckout file is missing from | exception | error | fossil, vcs, downloader, filesystem, checkout |
| failed: " " could not be written. | exception | error | self-update, filesystem, permissions, writable, file-lock |
| does not appear to be a git repository, use but remember… | exception | error | bitbucket, vcs, mercurial, git, api |
| Composer 2.3.0 dropped support for autoloading on PHP <5.6… | exception | critical | php, autoload, version, runtime, compatibility |
| Invalid package found during dependency resolution, aborting | exception | critical | security, package-metadata, dependency-resolution, argument-injection |
| Maximum allowed download size reached. Downloaded | exception | error | network, download, remote-filesystem, size-limit |
| Your composer.lock was generated before the allow-plugins… | exception | error | plugin, security, allow-plugins, composer-2, non-interactive |
| Could not create archive | exception | error | archiver, archive, zip, ext-zip |
| JsonManipulator: $childrenClean is not defined. Please… | exception | error | json, json-manipulator, bug-report, edge-case |
| " " does not match the expected JSON schema | validation | error | json, schema, validation, json-file, json-schema |
| Invalid package information | validation | error | validation, package-metadata, composer-json |
| has an invalid bin , it must not contain ".." path segments | exception | critical | security, binaries, path-traversal, package-metadata |
| " " is an invalid value for , expected a boolean | validation | error | composer, config, policy, boolean, validation |
| --strict-psr-autoloader mode only works with optimized… | exception | error | install-command, validation, autoloader, cli-options, psr-4 |
| At least the plugin package should always be autoloaded for… | exception | error | plugin, composer, autoload, internal-invariant |
| Composer update failed: the | exception | error | self-update, filesystem, permissions, writable, composer-binary |
| contains a Composer plugin which is blocked by your… | exception | error | plugins, allow-plugins, security, config, composer-json |
2 Failed resolving dependencies with | exception | error | dependency-resolution, solver, sat, version-constraint, composer-json |
| Could not find package | exception | error | package-discovery, repository-consistency, cache, metadata, require-command |
| Fallback to git driver disabled | exception | error | github, config, fallback, authentication |
| Invalid dependency policy name | validation | error | cli, config, policy, reserved-name |
| The input does not contain valid JSON | validation | error | json, parsing, syntax, jsonlint, json-file |
| " " does not match the expected JSON schema | validation | error | json, schema, validation, composer-json, factory |
| A fallback driver should be setup if getRepoData returns… | exception | error | composer, vcs, bitbucket, internal, assertion |
| has an invalid , it must not start with a | exception | critical | security, argument-injection, vcs, download, package-metadata |
| Link constraint in > should be a string, got ( ) | exception | error | loader, package, link, constraint, validation |
| Your composer.lock is invalid. Run "composer update" to… | exception | error | lock-file, composer, corruption, validation |
| Your configuration does not allow connections to | http | error | network, security, http, secure-http, config, transport |
| Package is not installed | exception | error | installer, repository-state, corruption, library-installer |
| Your configuration does not allow connections to | http | error | network, security, svn, secure-http, config, transport |
| Failed to clone to read package information from it | exception | error | git, network, clone, authentication |
| Update aborted | exception | error | svn, vcs, local-changes, interactive, user-abort |
| Could not switch to home directory | exception | error | filesystem, permissions, global-command, environment, composer-home |
| Invalid filter summary received from | validation | error | composer, repository, filter, metadata, upstream |
| GitDriver requires a usable cache directory, and it looks… | validation | error | git, cache, config, filesystem |
| The contents of do not match its signature. This could… | exception | critical | security, integrity, mitm, network, cache, checksum |
| Could not realpath() the source directory | exception | error | archiver, filesystem, path, archive |
| No lockfile found. Unable to read locked packages | exception | error | lock-file, composer, missing-file, programming-error |
| Composer rollback failed: could not download the signature… | console | error | cli, self-update, rollback, network, security |
| Composer rollback failed | exception | error | self-update, rollback, filesystem, backup |
| No composer.json present in the current directory | console | error | cli, require, composer-json, dependency-resolution |
| Repository could not be processed | exception | error | svn, vcs, repository, network, authentication |
| The ' ' URL could not be accessed | exception | error | network, ssl, tls, client-certificate, remote-filesystem |
| Repository type is not registered | validation | error | composer, repository, config, plugins |
| Filter api-url returned an unexpected response for | http | error | repository, metadata-filter, network, api-url, private-repo |
| No archiver found to support | exception | error | archiver, archive, format, validation |
| Plugin is missing a require statement for a version of the… | exception | error | plugin, composer, plugin-api, configuration |
| Cannot use " " as a separate argument. Quote the inline… | exception | error | require-command, validation, inline-alias, shell-quoting, package-discovery |
| COMPOSER_ROOT_VERSION not set or empty | exception | error | environment, composer, root-version, configuration |
| Could not find a version of package | exception | error | package-discovery, minimum-stability, version-constraint, require-command |
| Unable to read contents to update the lock file hash. | exception | error | lock-file, filesystem, permissions, composer |
| A repository of type "package" contains an invalid package… | validation | error | repository, package-type, validation, composer-json, inline-package |
| Invalid dependency policy name | exception | error | cli, policy, reserved-name, naming, configuration |
| Package must have a source or dist specified | exception | error | downloader, package, metadata, validation |
| Could not find package | exception | error | create-project, platform, php-version, package-resolution |
| Failed to execute ' . $command . "\n\n" … | exception | error | git, checkout, reference-gone, lock |
| " " is an invalid value | validation | error | composer, config, allow-plugins, boolean, validation |
| Subscriber :: for event is not callable, make sure the… | exception | error | event-dispatcher, plugin, subscriber, callable, autoload |
| Invalid input | validation | warning | cli, self-update, keys, validation, interactive |
| {message}{PHP_EOL}{instructions} | exception | error | configuration, project-setup, filesystem |
| Class must implement both… | exception | error | plugin, capability, composer, interface |
| Could not parse package list from the repository | validation | error | composer, filesystem-repository, installed-json, corruption |
| The package name is invalid, it should be lowercase and… | validation | error | init-command, validation, package-name, regex |
| Advisory for could not be loaded as a full advisory from | exception | error | composer, package-repository, security-advisories, config |
| " " does not contain valid JSON | validation | error | json, parsing, syntax, jsonlint, json-file, composer-json |
| Invalid security advisory configuration on | validation | error | composer, repository, security-advisories, metadata, upstream |
| Could not activate plugin | exception | error | plugin, installer, composer-2, interface |
| --file and --global can not be combined | validation | error | cli, config, option-conflict |
| Invalid repository data in | exception | error | repository, json, filesystem, local-repo, corruption |
| cURL error: ( ): cURL message | exception | critical | curl, multi, memory, libcurl, internal |
| Failed to execute \n\n | exception | error | svn, vcs, network, process, verbose |
| Source directory ' . $path . ' has unpushed changes on the… | exception | error | git, unpushed-changes, safety, config |
| Option is missing a version constraint, use e.g. :^1.0 | validation | error | cli, requirements, version-constraint |
| --prefer-install accepts one of "dist", "source" or "auto"… | validation | error | cli, option-validation, install |
| Invalid value for COMPOSER_DISCARD_CHANGES | exception | error | config, environment-variable, validation |
| Invalid credentials for | http | error | gitlab, authentication, token, invalid-credentials, ci |
| Please answer yes, y, no, or n. | console | error | console, interactive, input-validation, question |
| Setting does not exist or is not supported by this command | validation | error | composer, config, unknown-key, validation |
| The .git directory is missing from '.$path.', see… | exception | error | git, filesystem, source, metadata |
| The openssl extension is required for SSL/TLS protection… | exception | critical | ssl, network, extensions, security, environment |
| Failed to load , svn was not found, check that it is… | exception | error | svn, binary-not-found, environment, dependencies |
| The input is not UTF-8, could not parse as JSON | exception | error | json, utf-8, encoding, parsing |
| Failed to update composer.json with a valid format… | exception | error | config, json, schema, bug, internal |
| The referenced repository | exception | error | config, json, repositories, validation |
| The json file must be an object | exception | error | json, json-manipulator, validation, configuration |
| The pool can not accept packages from an installed… | exception | error | composer, repository, solver, lifecycle |
| Invalid ignore entry at key | exception | error | config, policy, ignore-rules, validation |
| Invalid ignore rule for | exception | error | policy, audit, configuration, validation |
| Package " " has no version or name and can not be locked | exception | error | lock-file, package-metadata, internal-invariant, composer |
| Can not compress to format | exception | error | archiver, archive, compression, phar, php-extension |
| A valid composer.lock file is required to run this command… | console | error | cli, dependencies, lock-file, locked |
| Failed to execute | exception | error | fossil, vcs, downloader, process-executor, command-failure |