[Bug 94662] New: Coroutines may be messing up with GTask's return

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94662

            Bug ID: 94662
           Summary: Coroutines may be messing up with GTask's return
           Product: Spice
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: spice-gtk
          Assignee: spice-bugs at lists.freedesktop.org
          Reporter: fabiano at fidencio.org

I've seen some weird behaviors of the GTask returning immediately when it was
supposed to return in idle, in spice-gtk code.

What I got from a brief talk with Dan Winship is that "a GTask will return
immediately only if:
(a) it is in a thread which is running the GMainContext that the task was
started in, and (b) that GMainContext has run at least one iteration since the
thread started (...) So if you have tasks that are returning immediately when
they shouldn't be, figure out how it is that those conditions are coming to be
true when you don't expect them to be)".

And that "If you are doing things like messing with the stack or calling
setcontext(), then it's possible that could mess things up. I don't know."

Let's investigate how to fix the coroutines on our side and, later on, open a
bug on GLib as well if that's the case.

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