Improved error message
minor #12598 Improved error message (WouterJ)

This PR was merged into the 2.7 branch.

Discussion
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Improved error message

If no alternatives could be found, the error message is: "Attempted to call method "getContents" on class "SebastianBergmann\Diff\Diff"." This doesn't point out any error, as it doesn't tell you that the method does not exists. This PR tries to fix this.

Commits
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5076a77 Improved error message
[Validator] Add deprecation message about Symfony\Component\Validator\MetadataInterface.
[Hackday][2.7] Resolves #12681. Added deprecation trigger for ClassBasedInterface.
minor #12739 [Validator] Add deprecation message #12677. (xelaris)

This PR was merged into the 2.7 branch.

Discussion
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[Validator] Add deprecation message #12677.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | #12677
| License       | MIT
| Doc PR        |

Commits
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a00c954 [Validator] Add deprecation message about Symfony\Component\Validator\MetadataInterface.
Deprecate Symfony\Component\Validator\GlobalExecutionContextInterface
minor #12740 [Hackday][2.7] Resolves #12681. Added deprecation trigger for ClassBased... (amansilla)

This PR was merged into the 2.7 branch.

Discussion
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[Hackday][2.7] Resolves #12681. Added deprecation trigger for ClassBased...

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | #12681
| License       | MIT
| Doc PR        |

Commits
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8bbbefe [Hackday][2.7] Resolves #12681. Added deprecation trigger for ClassBasedInterface.
minor #12742 Deprecate Symfony\Component\Validator\GlobalExecutionContextInterface (aferrandini)

This PR was merged into the 2.7 branch.

Discussion
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Deprecate Symfony\Component\Validator\GlobalExecutionContextInterface

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | #12689
| License       | MIT

Deprecate interface Symfony\Component\Validator\GlobalExecutionContextInterface

Commits
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b581096 Deprecate Symfony\Component\Validator\GlobalExecutionContextInterface
Adding a deprecation note about DialogHelper
Coding style fixing