diff --git a/poky/bitbake/lib/bb/__init__.py b/poky/bitbake/lib/bb/__init__.py
index e3f40a3..84a9051 100644
--- a/poky/bitbake/lib/bb/__init__.py
+++ b/poky/bitbake/lib/bb/__init__.py
@@ -9,7 +9,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 #
 
-__version__ = "1.49.1"
+__version__ = "1.49.2"
 
 import sys
 if sys.version_info < (3, 5, 0):
diff --git a/poky/bitbake/lib/bb/cookerdata.py b/poky/bitbake/lib/bb/cookerdata.py
index c39b568..1c1e008 100644
--- a/poky/bitbake/lib/bb/cookerdata.py
+++ b/poky/bitbake/lib/bb/cookerdata.py
@@ -429,7 +429,7 @@
                 parselog.critical("Undefined event handler function '%s'" % var)
                 raise bb.BBHandledException()
             handlerln = int(data.getVarFlag(var, "lineno", False))
-            bb.event.register(var, data.getVar(var, False),  (data.getVarFlag(var, "eventmask") or "").split(), handlerfn, handlerln)
+            bb.event.register(var, data.getVar(var, False),  (data.getVarFlag(var, "eventmask") or "").split(), handlerfn, handlerln, data)
 
         data.setVar('BBINCLUDED',bb.parse.get_file_depends(data))
 
diff --git a/poky/bitbake/lib/bb/event.py b/poky/bitbake/lib/bb/event.py
index 694b470..ff89959 100644
--- a/poky/bitbake/lib/bb/event.py
+++ b/poky/bitbake/lib/bb/event.py
@@ -118,6 +118,8 @@
             if _eventfilter:
                 if not _eventfilter(name, handler, event, d):
                     continue
+            if d and not name in (d.getVar("__BBHANDLERS_MC") or []):
+                continue
             execute_handler(name, handler, event, d)
 
 ui_queue = []
@@ -227,9 +229,13 @@
     fire_ui_handlers(event, d)
 
 noop = lambda _: None
-def register(name, handler, mask=None, filename=None, lineno=None):
+def register(name, handler, mask=None, filename=None, lineno=None, data=None):
     """Register an Event handler"""
 
+    if data and data.getVar("BB_CURRENT_MC"):
+        mc = data.getVar("BB_CURRENT_MC")
+        name = '%s%s' % (mc, name)
+
     # already registered
     if name in _handlers:
         return AlreadyRegistered
@@ -268,10 +274,20 @@
                     _event_handler_map[m] = {}
                 _event_handler_map[m][name] = True
 
+        if data:
+            bbhands_mc = (data.getVar("__BBHANDLERS_MC") or [])
+            bbhands_mc.append(name)
+            data.setVar("__BBHANDLERS_MC", bbhands_mc)
+
         return Registered
 
-def remove(name, handler):
+def remove(name, handler, data=None):
     """Remove an Event handler"""
+    if data:
+        if data.getVar("BB_CURRENT_MC"):
+            mc = data.getVar("BB_CURRENT_MC")
+            name = '%s%s' % (mc, name)
+
     _handlers.pop(name)
     if name in _catchall_handlers:
         _catchall_handlers.pop(name)
@@ -279,6 +295,12 @@
         if name in _event_handler_map[event]:
             _event_handler_map[event].pop(name)
 
+    if data:
+        bbhands_mc = (data.getVar("__BBHANDLERS_MC") or [])
+        if name in bbhands_mc:
+            bbhands_mc.remove(name)
+            data.setVar("__BBHANDLERS_MC", bbhands_mc)
+
 def get_handlers():
     return _handlers
 
diff --git a/poky/bitbake/lib/bb/parse/ast.py b/poky/bitbake/lib/bb/parse/ast.py
index 0596993..50a88f7 100644
--- a/poky/bitbake/lib/bb/parse/ast.py
+++ b/poky/bitbake/lib/bb/parse/ast.py
@@ -335,7 +335,7 @@
             if not handlerfn:
                 bb.fatal("Undefined event handler function '%s'" % var)
             handlerln = int(d.getVarFlag(var, "lineno", False))
-            bb.event.register(var, d.getVar(var, False), (d.getVarFlag(var, "eventmask") or "").split(), handlerfn, handlerln)
+            bb.event.register(var, d.getVar(var, False), (d.getVarFlag(var, "eventmask") or "").split(), handlerfn, handlerln, data=d)
 
         bb.event.fire(bb.event.RecipePreFinalise(fn), d)
 
diff --git a/poky/bitbake/lib/bb/runqueue.py b/poky/bitbake/lib/bb/runqueue.py
index 2f521e5..54ef245 100644
--- a/poky/bitbake/lib/bb/runqueue.py
+++ b/poky/bitbake/lib/bb/runqueue.py
@@ -1271,6 +1271,7 @@
             "date" : self.cfgData.getVar("DATE"),
             "time" : self.cfgData.getVar("TIME"),
             "hashservaddr" : self.cooker.hashservaddr,
+            "umask" : self.cfgData.getVar("BB_DEFAULT_UMASK"),
         }
 
         worker.stdin.write(b"<cookerconfig>" + pickle.dumps(self.cooker.configuration) + b"</cookerconfig>")
@@ -1466,7 +1467,7 @@
             if not self.dm_event_handler_registered:
                  res = bb.event.register(self.dm_event_handler_name,
                                          lambda x: self.dm.check(self) if self.state in [runQueueRunning, runQueueCleanUp] else False,
-                                         ('bb.event.HeartbeatEvent',))
+                                         ('bb.event.HeartbeatEvent',), data=self.cfgData)
                  self.dm_event_handler_registered = True
 
             dump = self.cooker.configuration.dump_signatures
@@ -1505,7 +1506,7 @@
         build_done = self.state is runQueueComplete or self.state is runQueueFailed
 
         if build_done and self.dm_event_handler_registered:
-            bb.event.remove(self.dm_event_handler_name, None)
+            bb.event.remove(self.dm_event_handler_name, None, data=self.cfgData)
             self.dm_event_handler_registered = False
 
         if build_done and self.rqexe: