default services conflit ?

old.vendor/pear/pear-core-minimal/README.rst

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+******************************
+Minimal set of PEAR core files
+******************************
+
+This repository provides a set of files from ``pear-core``
+that are often used in PEAR packages.
+
+It follows the `pear-core`__ repository and gets updated whenever a new
+PEAR version is released.
+
+It's meant to be used as dependency for composer packages.
+
+__ https://github.com/pear/pear-core
+
+==============
+Included files
+==============
+- ``OS/Guess.php``
+- ``PEAR.php``
+- ``PEAR/Error.php``
+- ``PEAR/ErrorStack.php``
+- ``System.php``
+
+
+``PEAR/Error.php`` is a dummy file that only includes ``PEAR.php``,
+to make autoloaders work without problems.