diff -r c93d046d4300 -r 55b053af7196 hgext/blackbox.py
--- a/hgext/blackbox.py	Mon Nov 12 21:10:51 2018 +0900
+++ b/hgext/blackbox.py	Sun Nov 11 18:08:33 2018 +0900
@@ -53,7 +53,6 @@
     pycompat,
     registrar,
     ui as uimod,
-    util,
 )
 from mercurial.utils import (
     dateutil,
@@ -147,9 +146,6 @@
 
     def log(self, ui, event, msg, opts):
         global _lastlogger
-        if not self.tracked(event):
-            return
-
         if self._bbvfs:
             _lastlogger = self
         elif _lastlogger and _lastlogger._bbvfs:
@@ -201,33 +197,20 @@
 
 def wrapui(ui):
     class blackboxui(ui.__class__):
-        def __init__(self, src=None):
-            super(blackboxui, self).__init__(src)
-            if src and r'_bblogger' in src.__dict__:
-                self._bblogger = src._bblogger
-
-        # trick to initialize logger after configuration is loaded, which
-        # can be replaced later with blackboxlogger(ui) in uisetup(), where
-        # both user and repo configurations should be available.
-        @util.propertycache
-        def _bblogger(self):
-            return blackboxlogger(self)
-
         def debug(self, *msg, **opts):
             super(blackboxui, self).debug(*msg, **opts)
             if self.debugflag:
                 self.log('debug', '%s', ''.join(msg))
 
-        def log(self, event, *msg, **opts):
-            super(blackboxui, self).log(event, *msg, **opts)
-            self._bblogger.log(self, event, msg, opts)
-
     ui.__class__ = blackboxui
     uimod.ui = blackboxui
 
 def uisetup(ui):
     wrapui(ui)
 
+def uipopulate(ui):
+    ui.setlogger(b'blackbox', blackboxlogger(ui))
+
 def reposetup(ui, repo):
     # During 'hg pull' a httppeer repo is created to represent the remote repo.
     # It doesn't have a .hg directory to put a blackbox in, so we don't do
@@ -235,7 +218,10 @@
     if not repo.local():
         return
 
-    logger = getattr(ui, '_bblogger', None)
+    # Since blackbox.log is stored in the repo directory, the logger should be
+    # instantiated per repository.
+    logger = blackboxlogger(ui)
+    ui.setlogger(b'blackbox', logger)
     if logger:
         logger.setrepo(repo)