--TEST--
Test the error output of solver problems is deduplicated.
--COMPOSER--
{
    "repositories": [
        {
            "type": "package",
            "package": [
                { "name": "package/a", "version": "2.0.0", "require": { "missing/dep": "^1.0" } },
                { "name": "package/a", "version": "2.0.1", "require": { "missing/dep": "^1.0" } },
                { "name": "package/a", "version": "2.0.2", "require": { "missing/dep": "^1.0" } },
                { "name": "package/a", "version": "2.0.3", "require": { "missing/dep": "^1.0" } },
                { "name": "package/a", "version": "2.1.0", "require": { "missing/dep": "^1.0" } },
                { "name": "package/a", "version": "2.2.0", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.3.1", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.3.2", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.3.3", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.3.4", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.3.5", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.4.0", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.5.0", "require": { "missing/dep": "^1.1" } },
                { "name": "package/a", "version": "2.6.0", "require": { "missing/dep": "^1.1" } },
                { "name": "missing/dep", "version": "2.0.0" }
            ]
        }
    ],
    "require": {
        "package/a": "*"
    }
}

--RUN--
update

--EXPECT-EXIT-CODE--
2

--EXPECT-OUTPUT--
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - package/a[2.2.0, ..., 2.6.0] require missing/dep ^1.1 -> found missing/dep[2.0.0] but it does not match the constraint.
    - package/a[2.0.0, ..., 2.1.0] require missing/dep ^1.0 -> found missing/dep[2.0.0] but it does not match the constraint.
    - Root composer.json requires package/a * -> satisfiable by package/a[2.0.0, ..., 2.6.0].

--EXPECT--