Issue #2968519 by alexpott, amateescu, martin107: The entity.query service is essentially deprecated because it relies on \Drupal\Core\Entity\Query\QueryFactory which is

Issue #2969806 by mihai11, Jo Fitzgerald: Fix "CckFile is deprecated in Drupal 8.3.x and will be be removed before Drupal 9.0.x. Use \Drupal\file\Plugin\migrate\process\d6\FieldFile instead." deprecation message

Issue #2912169 by alexpott, tobiberlin, Berdir, dawehner, grahamC: Inject the argument resolver into HttpKernel::__construct

Issue #2969757 by marcel66, amateescu, alexpott: Fix "The Drupal\migrate\Plugin\migrate\process\Iterator is deprecated in Drupal 8.4.x and will be removed before Drupal 9.0.0. Instead, use Drupal\migrate\Plugin\migrate\process\SubProcess"

Issue #2935255 by Jo Fitzgerald, kim.pepper, voleger, alexpott, martin107, jibran, catch: Remove all usages of drupal_get_message and drupal_set_message in core lib

Issue #2970026 by digdanlow: Fix "Passing a Session object to the ExpectationException constructor is deprecated as of Mink 1.7. Pass the driver instead."

Issue #2969807 by jmikii: Fix "LinkField is deprecated in Drupal 8.3.x and will be be removed before Drupal 9.0.x. Use \Drupal\link\Plugin\migrate\field\d7\LinkField instead." deprecation message

Issue #2969549 by marcel66, martin107: Fix "The $published parameter is deprecated since version 8.3.x and will be removed in 9.0.0." deprecation

Issue #2969972 by mihai11: Fix "The Drupal\taxonomy\Entity\Term::getVocabularyId method is deprecated since version 8.4.0 and will be removed before 9.0.0. Use Drupal\taxonomy\Entity\Term::bundle() instead to get the vocabulary ID." deprecation message

Issue #2937543 by alexpott, Berdir, larowlan: Using the Yaml::PARSE_KEYS_AS_STRINGS flag is deprecated since Symfony 3.4 as it will be removed in 4.0

Issue #2936704 by Wim Leers, amateescu, alexpott, Berdir: Remove REST route deprecations from DeprecationListenerTrait::getSkippedDeprecations(), use ExpectDeprecationTrait::expectDeprecation() instead

Issue #2670730 by chr.fritsch, robpowell, alexpott, tstoeckler, Berdir, bojanz, dawehner: Provide a delete action for each content entity type

Issue #2938369 by Mohit Malik, yo30, mondrake, alexpott: The Symfony\Component\ClassLoader\WinCacheClassLoader class is deprecated

Issue #2927746 by alexpott, catch, slasher13, mpdonadio, martin107, RoSk0, jibran, larowlan, pounard, Mile23, Jo Fitzgerald, deviantintegral, pritish.kumar: Update Symfony components to 3.4.*

Issue #2858482 by Wim Leers, dawehner, benjy, larowlan, tedbow, borisson_: Simplify REST routing: disallow requesting POST/PATCH in any format, make consistent

Issue #2916740 by chr.fritsch, xjm, Manuel Garcia, tstoeckler, alexpott, seanB, Sam152, amateescu, tim.plunkett, dawehner, larowlan, Berdir: Add generic entity actions

Issue #2933991 by alexpott, neclimdul: Deprecation tests fail when all PHPUnit tests are run via PHPUnit

Issue #2825487 by damiankloip, Wim Leers, garphy, cburschka, tedbow, dpovshed, tstoeckler, Munavijayalakshmi, Berdir, dawehner, e0ipso: Fix normalization of File entities: file entities should expose the file URL as a computed property on the 'uri' base field

Issue #2760167 by kim.pepper, markcarver, jibran, dawehner, znerol, Wim Leers, larowlan, xjm, tim.plunkett: Add \Drupal\Core\Messenger\Messenger

Issue #2928249 by alexpott, mondrake: Introduce a PHPUnit 6+ compatibility layer for Drupal\Tests\Listeners classes

Issue #1730874 by amateescu, e2thex, indytechcook, disasm, googletorp, hchonov, Berdir: Add support for loading multiple revisions at once

Issue #2392845 by amateescu, nuez, seanB, Alumei, penyaskito, vprocessor, steveoliver, lokapujya, tim.plunkett, yched, Sam152, Wim Leers, jibran, kristiaanvandeneynde, Berdir, larowlan, hchonov, fago: Add a trait to standardize handling of computed item lists

Issue #2870194 by alexpott, Mile23, jibran, larowlan, tim.plunkett: Ensure that process-isolated tests can use Symfony's PHPunit bridge to catch usages of deprecated code