--TEST--
Test that a root package conflict with a branch alias leads to an error, even if the branch alias isn't required.
--COMPOSER--
{
    "repositories": [
        {
            "type": "package",
            "package": [
                { "name": "some/dep", "version": "1.0.0" },
                { "name": "some/dep", "version": "1.1.0" },
                { "name": "some/dep", "version": "1.2.0" },
                { "name": "some/dep", "version": "dev-main", "extra": {"branch-alias": {"dev-main": "1.3.x-dev"} } },
                { "name": "some/dep", "version": "1.2.x-dev" }
            ]
        }
    ],
    "require": {
        "some/dep": "dev-main"
    },
    "conflict": {
        "some/dep": ">=1.3"
    }
}
--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
    - __root__ is present at version 1.0.0+no-version-set and cannot be modified by Composer
    - Root composer.json requires some/dep dev-main -> satisfiable by some/dep[dev-main].
    - __root__ 1.0.0+no-version-set conflicts with some/dep 1.3.x-dev.
    - some/dep 1.3.x-dev is an alias of some/dep dev-main and must be installed with it.
--EXPECT--