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Brad Fitzpatrick 01ee638cca Change some os.IsNotExist to errors.Is(err, os.ErrNotExist) for non-os errors. ... os.IsNotExist doesn't unwrap errors. errors.Is does. The ioutil.ReadFile ones happened to be fine but I changed them so we're consistent with the rule: if the error comes from os, you can use os.IsNotExist, but from any other package, use errors.Is. (errors.Is always would also work, but not worth updating all the code) The motivation here was that we were logging about failure to migrate legacy relay node prefs file on startup, even though the code tried to avoid that. See golang/go#41122		6 years ago
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derper.go	Change some os.IsNotExist to errors.Is(err, os.ErrNotExist) for non-os errors.	6 years ago
derper_test.go	derp, cmd/derper: add frameWatchConns, framePeerPresent for inter-DERP routing	6 years ago
mesh.go	cmd/derper: fix embarassing bug introduced in earlier refactor	6 years ago