Issue #3324995 by claudiu.cristea, GaëlG, dajjen: hook_requirements_alter() is not invoked on update

Issue #2932518 by kim.pepper, joachim, bradjones1, voleger, cliddell, gapple, Xano, andregp, andypost, neclimdul, rpayanm, Hardik_Patel_12, NWOM, smustgrave, dawehner, alexpott, daffie, larowlan, Berdir, mstrelan, xjm, dagmar: Deprecate watchdog_exception

Issue #3182405 by jhodgdon, smustgrave, ranjith_kumar_k_u, dww: Do not use verb "Install" for things other than turning on modules/themes

Issue #2941148 by quietone, bruno.bicudo, ravi.shankar, Sweetchuck, beatrizrodrigues, lucienchalom, VitaliyB98, WagnerMelo, sophiavs, ankitjain28may, daffie, longwave, Sutharsan, borisson_, cosmicdreams, heykarthikwithu, catch: Fix Drupal.Commenting.FunctionComment.MissingReturnType

Issue #3259188 by alexpott, dww, chr.fritsch: Extend post update system to provide themes a way to install newly-required dependencies

Issue #2010380 by alexpott, TR, tstoeckler, MerryHamster, sanjayk, andypost, chx, Pancho, daffie: Deprecate module_load_install() and replace it with ModuleHandler::loadInstall

Issue #697946 by voleger, pguillard, pillarsdotnet, andypost, alansaviolobo, alexpott, vaibhavjain, MerryHamster, sja112, kim.pepper, shaktik, ravi.shankar, Pooja Ganjage, daffie, Mile23, legolasbo, joelpittet, almaudoh, xjm, Berdir, scor: Properly deprecate module_load_include() and move it into \Drupal::moduleHandler() service

Issue #3222769 by bbrala, alexpott, longwave, Matroskeen: [November 8, 2021] Replace all list (array destructuring) assignment to the array syntax

Issue #2124069 by voleger, andypost, martin107, damiankloip, cburschka, dawehner, kim.pepper, daffie, pcambra, ParisLiakos, Xano, longwave, MerryHamster, vacho, kostyashupenko, catch, alexpott, amateescu, Mile23, claudiu.cristea, larowlan, almaudoh, Berdir, zviryatko: Convert schema.inc to the update.update_hook_registry service (UpdateHookRegistry)

Issue #1624278 by quietone, longwave: cleanup of docblock to UI text in update_get_update_list() is weak

Issue #2949419 by mfb, vsujeetkumar, gapple, Hardik_Patel_12, neclimdul, dawehner, Sam152, xjm, alexpott: Pass the raw exception to logger implementations

Issue #2807743 by alexpott, catch, kiamlaluno, neclimdul, xjm: Switch from deprecation notice to warning for non-standard placeholders in FormattableMarkup::placeholderFormat()

Issue #3143605 by andypost, longwave, daffie: Remove unused and broken update_replace_permissions(), which always throws an exception

Issue #3136668 by dww, dawehner, pavnish, catch, daffie, alexpott, xjm: Invalid system.schema key_value entry causes fatal on updating to 8.8.5

Issue #2055851 by andypost, jungle, dawehner, Mac_Weber, sja112, borisson_, fietserwin, init90, Gábor Hojtsy, xjm, effulgentsia, tim.plunkett: Remove translation of exception messages

Issue #3120910 by catch, longwave, tedbow, Pascal-, alexpott, Punyasloka: Sites with missing schema information can't update to 8.8.3+ - attempts to run all historical updates

Issue #3123376 by swatichouhan012, johndevman, longwave, xjm: update_fix_incompatibility() is (theoretically) dead code, but is also theoretically dangerous

Issue #2917600 by tedbow, alexpott, catch, anthonyf, xjm, andypost, Alan D., moshe weitzman, Berdir: update_fix_compatibility() puts sites into unrecoverable state

Issue #3098475 by Berdir, catch, TravisCarden, xjm, benjifisher, alexpott, larowlan, dww: Add more strict checking of hook_update_last_removed() and better explanation

Issue #2738879 by mr.baileys, trobey, dawehner, alexpott, ravi.shankar, catch, Fernly: system.schema can end up with missing schema information for some modules, resulting in hook_update_N() not getting called

Issue #2313917 by tedbow, pwolanin, jhedstrom, Wim Leers, Mixologic, larowlan, Mile23, Gábor Hojtsy, xjm, Berdir: Core version key in module's .info.yml doesn't respect core semantic versioning

Issue #2926068 by almaudoh, andypost, voleger, claudiu.cristea, Oleksiy, YurkinPark, yo30, alexpott, dawehner, Berdir: Deprecate system_rebuild_module_data() and remove usages in core

Issue #3031740 by alexpott, tmanhollan, catch, collinhaines: Updating to 8.6.8 or 8.6.9 with Drush 8 causes data loss via update_fix_compatibility()

Issue #3031128 by alexpott, TrevorBradley, indigoxela, catch, cilefen, larowlan, jibran: Update from 8.6.7 to 8.6.8 warnings - Drupal\Core\Extension\Extension has no unserializer

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 #2777451 by markdorison, er.pushpinderrana, alexpott: @see references not forming links in documentation

Issue #2572801 by alexpott, vprocessor, andriyun, andypost, chishah92, Mile23, attiks, hussainweb, klausi, dawehner, pfrenssen: Fix 'Drupal.WhiteSpace.ScopeIndent' coding standard

Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard