@b4n commented on this pull request.

In src/spawn.c:

> @@ -967,6 +1002,25 @@ static gboolean spawn_read_cb(GIOChannel *channel, GIOCondition condition, gpoin
 
 		sc->cb.read(buffer, input_cond | failure_cond, sc->cb_data);
 	}
+	/* Check for continuous activations with G_IO_IN | G_IO_PRI, without any
+	   data to read and without errors. If detected, switch to timeout source. */
+	else if (SPAWN_CHANNEL_GIO_WATCH(sc) && status == G_IO_STATUS_AGAIN)
+	{
+		sc->empty_gio_ins++;

@zhekov shouldn't this be reset to 0 on successful read attempts (or decremented, I don't know) to avoid the occasional one to trigger the switch after a long while? Assuming it's not the occasional faulty one that trigger the big issue.

I'm not sure I totally get the implications of the issue, but it seems sad to switch to timeout if the faulty callbacks happens from time to time only -- let's say it happens every minute, it would switch to timeout source after 3h20 nonetheless.

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