Why gpg 2.1.9 cannot export secret key without passphrase?

[Andrey Utkin]

Thank you for your hints Peter.

The following tiny changes allow exporting and importing to succeed

https://github.com/andrey-utkin/gnupg/commit/a3b539b6ef7c922b1f1f3f343fdc942086d96c4e

Is the approach of using "s2kmode = 0" and "protection sha1" together
correct? Shouldn't "protection none" be used?

-- 
OpenPGP usage is appreciated (it also helps your letter to bypass spam
filters). To email me with encryption easily, go
https://encrypt.to/0xC6FCDB11

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