7 files declare their use of MappingException in Zircon Profile 8.0

AbstractLoader.php in vendor/symfony/validator/Mapping/Loader/AbstractLoader.php

AnnotationLoader.php in vendor/symfony/validator/Mapping/Loader/AnnotationLoader.php

FileLoader.php in vendor/symfony/validator/Mapping/Loader/FileLoader.php

LoaderChain.php in vendor/symfony/validator/Mapping/Loader/LoaderChain.php

StaticMethodLoader.php in vendor/symfony/validator/Mapping/Loader/StaticMethodLoader.php

XmlFileLoader.php in vendor/symfony/validator/Mapping/Loader/XmlFileLoader.php

XmlFileLoaderTest.php in vendor/symfony/validator/Tests/Mapping/Loader/XmlFileLoaderTest.php