Support for symfony/debug v4 due to conflict with Drush

[kenorb]

Currently, I've got symfony/debug v4.0.6 installed as per:

$ composer global why symfony/debug -t
symfony/debug v4.0.6 Symfony Debug Component
└──symfony/console v3.4.6 (requires symfony/debug ~2.8|~3.0|~4.0)
   ├──consolidation/annotated-command 2.8.3 (requires symfony/console ^2.8|^3|^4)
   │  └──drush/drush 8.1.16 (requires consolidation/annotated-command ^2.8.1)
   │     └──__root__ (requires drush/drush ~8@stable)
   ├──consolidation/output-formatters 3.2.0 (requires symfony/console ^2.8|^3|^4)
   │  ├──consolidation/annotated-command 2.8.3 (requires consolidation/output-formatters ^3.1.12)
   │  │  └──drush/drush 8.1.16 (requires consolidation/annotated-command ^2.8.1)
   │  │     └──__root__ (requires drush/drush ~8@stable)
   │  └──drush/drush 8.1.16 (requires consolidation/output-formatters ~3)
   │     └──__root__ (requires drush/drush ~8@stable)
   ├──drush/drush 8.1.16 (requires symfony/console ~2.7|^3)
   │  └──__root__ (requires drush/drush ~8@stable)
   └──psy/psysh v0.8.17 (requires symfony/console ~2.3.10|^2.4.2|~3.0|~4.0)
      └──drush/drush 8.1.16 (requires psy/psysh ~0.6)
         └──__root__ (requires drush/drush ~8@stable)

So I cannot install the latest version of drupal/console (v1.8) since drupal/console-core requires symfony/debug ~2.8|~3.0 (but not ~4.0).

$ composer global show -a drupal/console-core | grep debug
symfony/debug ~2.8|~3.0

Is there any chance to expand the dependencies to support symfony/debug as ~2.8|~3.0|~4.0? Or drop it from the composer.json, since symfony/debug is already included with symfony/console 3.4.6, e.g.

$ composer global show -a symfony/console 3.4.6 | grep debug
symfony/debug ~2.8|~3.0|~4.0

---

My error:

$ composer global require drupal/console
  Problem 1
    - drupal/console 1.8.0 requires drupal/console-core 1.8.0 -> satisfiable by drupal/console-core[1.8.0].
    - Installation request for drupal/console ^1.8 -> satisfiable by drupal/console[1.8.0].
    - Conclusion: remove symfony/debug v4.0.6
    - Conclusion: don't install symfony/debug v4.0.6
    - drupal/console-core 1.8.0 requires symfony/debug ~2.8|~3.0 -> satisfiable by symfony/debug
...
    - Can only install one of: symfony/debug[v3.4.6, v4.0.6].
    - Installation request for symfony/debug (locked at v4.0.6) -> satisfiable by symfony/debug[v4.0.6].

My existing composer.json:

{
    "require": {
        "drush/drush": "~8@stable"
    }
}

[Helrunar]

I have the same error. Switched back to symfony/debug 3.4.8 to get drupal/console installed

[vingov]

I had to do the following to install the drupal console: composer require symfony/debug:3.4.8 composer require symfony/dom-crawler:3.4.9 composer require --dev drupal/console

[crittermike]

Bumping this issue. Is there any particular reason why v4 of symfony/debug isn't allowed?

[sealionking]

the same issue and the following solved the problem

I had to do the following to install the drupal console: composer require symfony/debug:3.4.8 composer require symfony/dom-crawler:3.4.9 composer require --dev drupal/console

[greggles]

I had this problem on a site that did not have Drush installed, so that part of the title is misleading.

I noted that all the other packages that rely on symfony/debug support older versions as well, so the solutions posted here of requiring a 3.x version of symfony/debug worked for me as well. I also filed a pull request 347 to address this. I didn't test it. I assumed there was some automated tests, but it seems that's not the case.

[benk-cogapp]

I believe this is now causing incompatibility with Drupal 9 due to the ~2.8|~3.0 version requirements, as in D9 all Symfony dependencies are pinned to be ^4.4. Can we have a version released to support these same Symfony dependencies? Thanks.

[LOBsTerr]

We can close the ticket, because "symfony/debug": "~3.0|^4.4" is supported