commit:     0f7c9a73a805af5ec70da587b3c7d7f59dabe5ce
Author:     Zac Medico <zmedico <AT> gentoo <DOT> org>
AuthorDate: Tue Apr 17 17:57:04 2018 +0000
Commit:     Zac Medico <zmedico <AT> gentoo <DOT> org>
CommitDate: Tue Apr 17 17:59:10 2018 +0000
URL:        https://gitweb.gentoo.org/proj/portage.git/commit/?id=0f7c9a73

EventLoop._run_idle_callbacks: remove recursion check

This recursion check does not really work because callbacks are
removed from self._idle_callbacks before recursion would occur.

Fixes: 9772f8f2a58a (EventLoop._idle_add: use thread-safe deque append)

 pym/portage/util/_eventloop/EventLoop.py | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/pym/portage/util/_eventloop/EventLoop.py 
b/pym/portage/util/_eventloop/EventLoop.py
index c38a4defd..a61a3d74a 100644
--- a/pym/portage/util/_eventloop/EventLoop.py
+++ b/pym/portage/util/_eventloop/EventLoop.py
@@ -55,7 +55,7 @@ class EventLoop(object):
                __slots__ = ("callback", "data", "pid", "source_id")
 
        class _idle_callback_class(SlotObject):
-               __slots__ = ("_args", "_callback", "_calling", "_cancelled")
+               __slots__ = ("_args", "_callback", "_cancelled")
 
        class _io_handler_class(SlotObject):
                __slots__ = ("args", "callback", "f", "source_id")
@@ -545,21 +545,11 @@ class EventLoop(object):
                                if x._cancelled:
                                        # it got cancelled while executing 
another callback
                                        continue
-                               if x._calling:
-                                       # The caller should use call_soon in 
order to prevent
-                                       # recursion here. Raise an error 
because recursive
-                                       # calls would make the remaining count 
for this loop
-                                       # meaningless.
-                                       raise AssertionError('recursive idle 
callback')
-                               x._calling = True
-                               try:
-                                       if x._callback(*x._args):
-                                               reschedule.append(x)
-                                       else:
-                                               x._cancelled = True
-                                               state_change += 1
-                               finally:
-                                       x._calling = False
+                               if x._callback(*x._args):
+                                       reschedule.append(x)
+                               else:
+                                       x._cancelled = True
+                                       state_change += 1
                finally:
                        # Reschedule those that were not cancelled.
                        self._idle_callbacks.extend(reschedule)

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