inotify: fix panic on Remove() #650
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It would do:
events := read_events_from_kernel()
for _, e := range events {
watch := read_our_state(e)
do_stuff_with(watch)
}
However, between read_events_from_kernel() and read_our_state() the
internal state could have been removed with Watcher.Remove() in another
goroutine, so it would return nil.
In many cases it already did "if watch != nil && [..]" to deal with
this, but not everywhere. Do an "early continue" instead.
Fixes #616
---
Ideally what it should do is block any Remove() for all of the above
code, so it always operates on a consistent state. But that's not so
easy to do in a quick fix, and I don't really have the time to spend on
this at the moment (and it seems no one else has either).
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It would do:
However, between read_events_from_kernel() and read_our_state() the internal state could have been removed with Watcher.Remove() in another goroutine, so it would return nil.
In many cases it already did "if watch != nil && [..]" to deal with this, but not everywhere. Do an "early continue" instead.
Fixes #616
Ideally what it should do is block any Remove() for all of the above code, so it always operates on a consistent state. But that's not so easy to do in a quick fix, and I don't really have the time to spend on this at the moment (and it seems no one else has either).