Dealing with Multiple McEventCollections

See merge request atlas/athena!21993

Manual sweep of athenaprivate1!16317 from 21.0 to master: workaround for the issues seen when passing zero lifetime particles to Geant4 (ATLASSIM-3313)

See merge request atlas/athena!22026

Fixed an issue that L2MuonSA can't work in the newJO test due to wrong values of MDT circles, ATR-16944

See merge request atlas/athena!22042

TileMonitoring: Migrate monitoring Tile time with jets for Run 3

See merge request atlas/athena!22057

GeoPrimitives: Drop backwards compatibility with Eigen <= 3.3.0

See merge request atlas/athena!22073

G4DebuggingTools: declare public headers

See merge request atlas/athena!22076

TrigEgammaEmulationTool: Fix variable naming

See merge request atlas/athena!22080

Moving code for electron chain setup from TUT to TMMT

See merge request atlas/athena!21596

R-hadron cleanup for master

See merge request atlas/athena!22034

Add HLT timeout handling and improve handling of other errors

See merge request atlas/athena!21931

disable access to the offline conditions in the online mode - it fixes  ATLASRECTS-4865

Closes ATLASRECTS-4865

See merge request atlas/athena!21874

Consider bad SCT strips in InDetTrackHoleSearchTool (ATLASRECTS-4902)

See merge request atlas/athena!22070

LongLivedParticleDPDMaker: Remove reference to xAOD::EventInfo.

See merge request atlas/athena!22062

CaloCondPhysAlgs: Use conditions handle to read hvcorr information.

See merge request atlas/athena!22069

TrigT1CaloToolInterfaces+TrigT1CaloTools: Make most methods of IL1CPMTools const.

See merge request atlas/athena!22061

Change variable names to comply with ATLAS naming convention and to
avoid compilation warnings.

Add the PUBLIC_HEADERS in the cmake configuration to properly install
them (and to avoid the cmake warning).

SCT_RawDataByteStreamCnv: Updating SCT_RodDecoder according to ATLAS Coding Guidelines

See merge request atlas/athena!22009

TrigMessageSvc: modernize and sync with Gaudi/master

See merge request atlas/athena!22012

Manual sweep of !21768 from '21.0' to 'master: Protection for empty GenEvents in BeamEffectsAlg::patchSignalProcessVertex(...)

See merge request atlas/athena!22015

LArMonTools: Use conditions handle to read hvcorr information.

See merge request atlas/athena!22058

DecisionHandling: remove pure virtual overrides from Hypo/InputMakerBase

See merge request atlas/athena!22023

athenaHLT: add option to debug fork and fix timeout

See merge request atlas/athena!22021

Drop the support of older Eigen versions and cleanup dictionary rules.

TrigT1Interfaces: Fix gcc9 warnings.

See merge request atlas/athena!22059

AthenaMP: Fix gcc9 warnings.

See merge request atlas/athena!22060

Change from using ILArHVCorrTool to using a conditions handle.
Also get online hvcorr from the conditions store rather than the detector store.

Remove unneeded reference to xAOD::EventInfo; use EventContext instead.

Make most methods of IL1CPMTools const.  formSums() is still not done.
To avoid ToolHandle constness issues in TrigT1CaloSim.

Make most methods of L1CPMTools const.  formSums() is still not done.
To avoid ToolHandle constness issues in TrigT1CaloSim.

Fix const correctness in Tile containers

See merge request atlas/athena!21995

In C++11, implicit declarations of copy and assignment are deprecated if the
class has a user defined destructor or copy or assignment.  gcc9 now warns
about this by default.
Adjust to avoid the warning.