Issue #3106216 by Spokje, longwave, alexpott, apaderno, Hardik_Patel_12, daffie: Remove unused variables from core

Issue #3209619 by longwave, daffie, catch: [Symfony 6] Passing null as $message to Symfony exception constructors is deprecated, pass an empty string instead

Issue #3110296 by Hardik_Patel_12, longwave, Berdir: Remove all @deprecated code from Drupal/Core/Access/

Issue #3048498 by jonathan1055, Lendude, naveenvalecha, klausi, alexpott, Gábor Hojtsy: [≈Nov. 11] Fix Drupal.Commenting.Deprecated coding standard

Issue #3069028 by alexpott: Properly Deprecate Drupal\Core\Access\AccessResult::cacheUntilConfigurationChanges

Issue #2937888 by dhruveshdtripathi, idebr, RoSk0, mohit1604, mfernea, borisson_: Fix 'Drupal.Commenting.DocComment.LongNotCapital' coding standard

Issue #2938053 by Wim Leers, alexpott: AccessResult::orIf() fails to retain the reason if both operands are neutral or forbidden, but the first contains a reason and the second one does not

Issue #2853503 by Aki Tendo, alexpott, larowlan, Wim Leers, klausi, fgm, dawehner, mondrake, catch, Berdir, neclimdul, borisson_: Remove all assert('string') calls from Drupal core because deprecated in PHP 7.2

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2808233 by gnuget, dawehner, Wim Leers, tedbow, Chi, dysrama: REST 403 responses don't tell the user *why* access is not granted: requires deep Drupal understanding to figure out

Issue #2681911 by garphy, Wim Leers, gabesullice: REST requests without X-CSRF-Token header: unhelpful response significantly hinders DX, should receive a 401 response

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2526326 by borisson_, Berdir, Wim Leers, Xano: Update CacheableMetadata & AccessResult to use RefinableCacheableDependency(Interface|Trait)

Issue #2524082 by pfrenssen, Gábor Hojtsy, Wim Leers, Berdir, Fabianx, dawehner, catch: Config overrides should provide cacheability metadata

Issue #2512718 by Berdir, pfrenssen, Wim Leers, Fabianx, dawehner, catch, effulgentsia, plach, Gábor Hojtsy: EntityManager::getTranslationFromContext() should add the content language cache context to the entity

Issue #2483781 by borisson_, rbayliss, cilefen, mitalimehta, joshi.rohit100: Move cache contexts classes from \Drupal\Core\Cache to \Drupal\Core\Cache\Context

Issue #2099137 by Wim Leers, amateescu, rteijeiro, larowlan, effulgentsia: Entity/field access and node grants not taken into account with core cache contexts

Issue #2468151 by lhangea, rpayanm, Palashvijay4O: Rename the CacheContexts service to CacheContextsManager

Issue #2444231 by Wim Leers, nlisgo: Fix CacheableInterface so it makes sense (was: "Make Config objects & Entities implement CacheableInterface + add BubbleableMetadata::createFromCacheableObject()")

Issue #2428703 by Wim Leers: Add a 'user.permissions' cache context (was: "Should cache contexts be able to associate a cache tag?")

Issue #2443073 by Wim Leers, joshtaylor: Add #cache[max-age] to disable caching and bubble the max-age

Issue #2329101 by Wim Leers: CacheableInterface only has a getCacheKeys() method, no getCacheContexts(), leads to awkward implementations

Issue #2040135 by Wim Leers, Berdir: Caches dependent on simple config are only invalidated on form submissions

Issue #1986640 by Wim Leers, chx, dawehner, effulgentsia: Support AND/OR conjunctions for permission checks.

Issue #2340123 by Wim Leers: Setting cache tags can be tricky: use strings instead of nested arrays to improve DX.