Did you know stashing changes for one branch on another by accident a…

…nd forgetting about them is not great?

src/character.cpp

@@ -11051,7 +11051,7 @@ void Character::gravity_check()
     map &here = get_map();
     if( here.is_open_air( pos_bub() ) && !has_effect_with_flag( json_flag_GLIDING ) &&
         here.try_fall( pos_bub(), this ) ) {
-        get_map().update_visibility_cache( pos_bub().z() );
+        here.update_visibility_cache( pos_bub().z() );
     }
 }
 

src/do_turn.cpp

@@ -488,9 +488,6 @@ bool do_turn()
         }
     }
 
-    // Make sure players cant defy gravity by standing still, Looney tunes style.
-    u.gravity_check();
-
     // If you're inside a wall or something and haven't been telefragged, let's get you out.
     if( ( m.impassable( u.pos_bub() ) && !m.impassable_field_at( u.pos_bub() ) ) &&
         !m.has_flag( ter_furn_flag::TFLAG_CLIMBABLE, u.pos_bub() ) ) {
@@ -557,6 +554,7 @@ bool do_turn()
     if( !u.has_effect( effect_sleep ) || g->uquit == QUIT_WATCH ) {
         if( u.get_moves() > 0 || g->uquit == QUIT_WATCH ) {
             while( u.get_moves() > 0 || g->uquit == QUIT_WATCH ) {
+                m.process_falling();
                 g->cleanup_dead();
                 g->mon_info_update();
                 // Process any new sounds the player caused during their turn.

src/game.cpp

@@ -11749,7 +11749,6 @@ bool game::grabbed_furn_move( const tripoint_rel_ms &dp )
         std::string danger_tile = enumerate_as_string( get_dangerous_tile( fdest ) );
         add_msg( _( "You let go of the %1$s as it falls down the %2$s." ), furntype.name(), danger_tile );
         u.grab( object_type::NONE );
-        m.drop_furniture( fdest );
         return true;
     }
 

src/iuse_actor.cpp

@@ -1202,7 +1202,6 @@ std::optional<int> deploy_furn_actor::use( Character *p, item &it,
     }
 
     get_map().furn_set( suitable.value(), furn_type );
-    get_map().drop_furniture( suitable.value() );
     it.spill_contents( suitable.value() );
     p->mod_moves( -to_moves<int>( 2_seconds ) );
     return 1;

src/map.cpp

@@ -2885,14 +2885,16 @@ bool map::has_vehicle_floor( const tripoint_bub_ms &p ) const
 
 void map::drop_everything( const tripoint_bub_ms &p )
 {
-    if( has_floor_or_water( p ) ) {
-        return;
-    }
+    // Creature has their own gravity check
+    drop_creature( p );
 
-    drop_furniture( p );
-    drop_items( p );
-    drop_vehicle( p );
-    drop_fields( p );
+    // TODO: Should be more nuance here, only low density items/furniture should float on water etc
+    if( !has_floor_or_water( p ) ) {
+        drop_furniture( p );
+        drop_items( p );
+        drop_vehicle( p );
+        drop_fields( p );
+    }
 }
 
 void map::drop_furniture( const tripoint_bub_ms &p )
@@ -3184,6 +3186,21 @@ void map::drop_fields( const tripoint_bub_ms &p )
     }
 }
 
+void map::drop_creature( const tripoint_bub_ms &p ) const
+{
+    monster *mon_at_p = get_creature_tracker().creature_at<monster>( p );
+    if( mon_at_p ) {
+        mon_at_p->gravity_check();
+        // Handle character potentially standing on monster ("zed walking")
+        drop_creature( p + tripoint_rel_ms::above );
+        return;
+    }
+    Character *char_at_p = get_creature_tracker().creature_at<Character>( p );
+    if( char_at_p ) {
+        char_at_p->gravity_check();
+    }
+}
+
 void map::support_dirty( const tripoint_bub_ms &p )
 {
     if( zlevels ) {

src/map.h

@@ -1965,18 +1965,19 @@ class map
         // TODO: Get rid of untyped overload
         bool has_vehicle_floor( const tripoint &p ) const;
         bool has_vehicle_floor( const tripoint_bub_ms &p ) const;
-
+    private:
         /**
-         * Handles map objects of given type (not creatures) falling down.
+         * Handles map objects of given type falling down.
          */
         /*@{*/
         void drop_everything( const tripoint_bub_ms &p );
         void drop_furniture( const tripoint_bub_ms &p );
         void drop_items( const tripoint_bub_ms &p );
         void drop_vehicle( const tripoint_bub_ms &p );
         void drop_fields( const tripoint_bub_ms &p );
+        void drop_creature( const tripoint_bub_ms &p ) const;
         /*@}*/
-
+    public:
         /**
          * Invoked @ref drop_everything on cached dirty tiles.
          */