InvalidConfigProviderException: Mezzio\Helper\ConfigProvider is registered more than once

[galvao]

Bug Report

Q	A
Version(s)	3.15.0

Summary

Clean installation results in an error after running bin/clear-config-cache.php

Current behavior

Script php bin/clear-config-cache.php handling the clear-config-cache event returned with error code 255
Script @clear-config-cache was called via post-update-cmd

How to reproduce

Just do a clean project creation: composer create-project mezzio/mezzio-skeleton dir_name
Using composer's --no-cache flag yields the same error.

Expected behavior

Finish the project creation without errors.

[matthewpallotta]

Removing line 19 \Mezzio\Helper\ConfigProvider::class from config\config.php should fix the issue.
Conflicts with line 25 ConfigProvider::class

This fixed my issue with the current skeleton.

[alexmerlin]

We cannot remove ConfigProviders from config/config.php because, depending how the project is installed, one might choose not to inject ConfigProviders into config/config.php, leading to the opposite of the current situation where ConfigProviders are not registered at all.
@Xerkus what do you think?

[froschdesign]

Maybe the renaming under version 3 of laminas-component-installer is the problem: laminas/laminas-component-installer#52

See: https://docs.laminas.dev/laminas-component-installer/#marking-packages-to-auto-install

[galvao]

I can confirm @matthewpallotta's solution:

1. Started a fresh install with composer create-project;
2. Received the error message;
3. Edited config/config.php and deleted line 19;
4. Ran composer update and the problem is gone.

Thank you, Matthew!

P.S.: Haven't ran a full test yet (meaning, running the actual application), will update this soon to let you know.

[rhengles]

The title and description of this issue are horrible for SEO

So let me spell the actual error:

InvalidConfigProviderException: Mezzio\Helper\ConfigProvider is registered more than once mezzio/mezzio#203

Fatal error: Uncaught Laminas\ConfigAggregator\InvalidConfigProviderException: Mezzio\Helper\ConfigProvider is
registered more than once. Config providers should be unique. In case a specific order is required, please double
check before deleting the duplicate(s). in ***\vendor\laminas\laminas-config-aggregator\src
\InvalidConfigProviderException.php:15
Stack trace:
    #0 ***\vendor\laminas\laminas-config-aggregator\src\ConfigAggregator.php(117): Laminas\ConfigAggregator\InvalidConfigProviderException::fromDuplicateProvider('Mezzio\\Helper\\C...')
    #1 ***\vendor\laminas\laminas-config-aggregator\src\ConfigAggregator.php(85): Laminas\ConfigAggregator\ConfigAggregator->validateNoDuplicateProviders(Array)
    #2 ***\config\config.php(16): Laminas\ConfigAggregator\ConfigAggregator->__construct(Array, 'data/cache/conf...')
    #3 ***\bin\clear-config-cache.php(9): include('***\project\...')
    #4 {main}
  thrown in ***\vendor\laminas\laminas-config-aggregator\src\InvalidConfigProviderException.php on line 15