bug #22396 Prevent double registrations related to tag priorities (nicolas-grekas)
bug #22396 Prevent double registrations related to tag priorities (nicolas-grekas)

This PR was merged into the 2.7 branch.

Discussion
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Prevent double registrations related to tag priorities

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

The current logic is inconsistent, and allows the same id to be used several times. This makes the first explicit priority to always win.

Commits
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6764dcdf39 Prevent double registrations related to tag priorities

symfony/twig-bundle,symfony/twig-bundle