Issue #2151103 by twistor, kerby70, ParisLiakos, cilefen: Zend feed plugins are incorrectly registered

Issue #2493033 by Berdir, Wim Leers, lauriii, Fabianx, effulgentsia, dawehner, catch, msonnabaum, Crell, webchick: Make 'user.permissions' a required cache context

Issue #2392559 by mondrake, mitrpaka, JeroenT, rpayanm, adci_contributor, ianthomas_uk: Remove all uses of file_stream_wrapper_get_* and file_get_stream_wrappers

Issue #2354889 by larowlan, dawehner, lauriii, Berdir, catch, martin107, pfrenssen, EclipseGc, Fabianx, Wim Leers, dsnopek, jibran, tim.plunkett, andypost: Make block context faster by removing onBlock event and replace it with loading from a ContextManager

Issue #2450993 by Wim Leers, Fabianx, Crell, dawehner, effulgentsia: Rendered Cache Metadata created during the main controller request gets lost

Issue #2509898 by dawehner, znerol, larowlan, lauriii, Aki Tendo, Wim Leers: Additional uncaught exception thrown while handling exception after service changes

Issue #2505669 by pwolanin, jcloys, joshi.rohit100, dawehner, Wim Leers, kgoel, larowlan: Inject render service into LinkGenerator instead of calling drupal_render

Revert "Issue #2505669 by pwolanin, jcloys, joshi.rohit100: Inject render service into LinkGenerator instead of calling drupal_render"

This reverts commit 8d848f2d.

Issue #2505669 by pwolanin, jcloys, joshi.rohit100: Inject render service into LinkGenerator instead of calling drupal_render

Issue #2511472 by Wim Leers, Fabianx, dawehner: Refactor all usages of drupal_render()/Renderer::render() that break #2450993

Issue #2500527 by dawehner, tim.plunkett, effulgentsia: Rewrite \Drupal\file\Controller\FileWidgetAjaxController::upload() to not rely on form cache

Issue #2407195 by Wim Leers, Fabianx, joelpittet, lauriii, Crell: Move attachment processing to services and per-type response subclasses

Issue #2480811 by catch, dawehner, Crell, Berdir, amateescu: Cache incoming path processing and route matching

Issue #2499943 by mikey_p, Berdir, catch: system.active_theme.THEMENAME state should not cache theme data

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

Issue #2263569 by tim.plunkett, effulgentsia, Fabianx, dawehner, Wim Leers, larowlan: Bypass form caching by default for forms using #ajax.

Issue #1493324 by tim.plunkett, dmsmidt, mgifford, bleen18, davidhernandez, crasx, mparker17, stefan.r, YesCT, joelpittet, tstoeckler, larowlan, vijaycs85, swentel, rpayanm, Bojhan, LewisNyman, emma.maria, BarisW, njbarrett, rteijeiro, nod_, sun, joshtaylor, mrjmd, webchick, marcvangend, kattekrab, SKAUGHT, bowersox, andrewmacpherson, Manjit.Singh, RavindraSingh, Wim Leers, BLadwin, aspilicious, mortendk, mausolos, jessebeach, Gábor Hojtsy, anandps, falcon03, franz, andypost, rooby, rootwork, Cottser, Xano: Inline form errors for accessibility and UX

Issue #2456521 by pjonckiere, mpdonadio, jhodgdon, rteijeiro, David_Rothstein, xjm: Add DateFormatter::formatDiff() as a non-buggy alternative to DateFormatter::formatInterval() when the start and end of the interval are known

Issue #2384675 by sidharrell, cilefen, Mile23, damiankloip, dawehner, Wim Leers, alexpott, neclimdul: Deprecate conf_path()

Issue #2501355 by willzyx: Remove unused router.builder service from Drupal\Core\Menu\LocalTaskManager

Issue #2392293 by bircher, tim.plunkett, alexpott, cilefen, gobinathm: Refactor hook_system_info_alter implementations to use ModuleUninstallValidatorInterface

Issue #2481453 by dawehner, pwolanin, rteijeiro, neclimdul, znerol: Implement query parameter based content negotiation as alternative to extensions

Issue #2477461 by borisson_, googletorp, Wim Leers, Crell: Move X-Generator header to its own listener

Issue #2416831 by cilefen, vasi, tadityar, Noe_, lauriii, akalata, JeroenT, Cottser, davidhernandez: Add an active_theme twig function

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #2465887 by dawehner, amateescu, tim.plunkett: Extract the install/uninstall functionality to a ThemeInstaller

Issue #2361423 by alexpott, larowlan, dixon_, swentel: Add a step to config import to allow contrib to create content based on config dependencies

Issue #2416109 by alexpott, bircher, xjm, dawehner: Validate configuration dependencies before importing configuration

Issue #2472323 by dawehner, neclimdul, Crell, kim.pepper, nod_, Wim Leers, larowlan, jibran, pwolanin, catch: Move modal / dialog to query parameters

Issue #2335661 by Wim Leers, pwolanin, dawehner, Fabianx, larowlan, catch, Berdir: Outbound path & route processors must specify cacheability metadata

Issue #2479363 by Wim Leers, dawehner: Cache MenuActiveTrail::getActiveIds() for *all* menus per route match: 1 cache get instead of N DB queries, saves 1 ms/response