Add some logging for #152

qutebrowser/browser/hints.py

@@ -20,9 +20,11 @@
 """A HintManager to draw hints over links."""
 
 import math
+import functools
 import subprocess
 import collections
 
+import sip
 from PyQt5.QtCore import pyqtSignal, pyqtSlot, QObject, QEvent, Qt, QUrl
 from PyQt5.QtGui import QMouseEvent, QClipboard
 from PyQt5.QtWidgets import QApplication
@@ -158,6 +160,8 @@ class HintManager(QObject):
                 pass
         for f in self._context.frames:
             log.hints.debug("Disconnecting frame {}".format(f))
+            if objreg.get('args').debug:
+                sip.dump(f)
             f.contentsSizeChanged.disconnect(self.on_contents_size_changed)
             log.hints.debug("Disconnected.")
         text = self.HINT_TEXTS[self._context.target]
@@ -602,6 +606,8 @@ class HintManager(QObject):
         self._context.target = target
         self._context.baseurl = tabbed_browser.current_url()
         self._context.frames = webelem.get_child_frames(mainframe)
+        for frame in self._context.frames:
+            frame.destroyed.connect(self.on_frame_destroyed)
         self._context.args = args
         self._init_elements(mainframe, group)
         message_bridge = objreg.get('message-bridge', scope='window',
@@ -745,3 +751,8 @@ class HintManager(QObject):
             # hinting.
             return
         self._cleanup()
+
+    @pyqtSlot('QObject')
+    def on_frame_destroyed(self, obj):
+        """Log when a frame got destroyed by Qt."""
+        log.hints.debug("frame destroyed: {}".format(obj))