curl imap returns error 78 File not found instead of the email

The version of curl included in Ubuntu 18.04 LTS has a bug that causes the imap sub-command/scheme to return Error 78 File not found when it should return the contents of the email.

This is documented in the Bug Report on GitHub as: https://github.com/curl/curl/issues/4479

The version supplied in Ubuntu 19.10, and future 20.04 LTS will be the fixed version.

Ubuntu 18.04
Version:
$ curl -V
curl 7.58.0 (x86_64-pc-linux-gnu) libcurl/7.58.0 OpenSSL/1.1.1 zlib/1.2.11 libidn2/2.0.4 libpsl/0.19.1 (+libidn2/2.0.4) nghttp2/1.30.0 librtmp/2.3
Release-Date: 2018-01-24
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz TLS-SRP HTTP2 UnixSockets HTTPS-proxy PSL

Command:
$ curl --insecure --url "imaps://email.example.co.nz/Spam;UID=33" -n
curl: (78) Remote file not found

Ubuntu 19.10
Version:
$ curl -V
curl 7.65.3 (x86_64-pc-linux-gnu) libcurl/7.65.3 OpenSSL/1.1.1c zlib/1.2.11 libidn2/2.2.0 libpsl/0.20.2 (+libidn2/2.0.5) libssh/0.9.0/openssl/zlib nghttp2/1.39.2 librtmp/2.3
Release-Date: 2019-07-19
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: AsynchDNS GSS-API HTTP2 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM NTLM_WB PSL SPNEGO SSL TLS-SRP UnixSockets

Command:
$ curl --insecure --url "imaps://email.example.co.nz/Spam;UID=33" -n
Return-Path: <email address hidden>
Received: from email.example.co.nz ([unix socket])
  by email (Cyrus x.xx.xx. with LMTPA;
  Tue, 28 Jan 2020 22:05:56 +1300
X-Sieve: CMU Sieve x.x
8x ---- Snip ---- x8

Also the version supplied with OSX works correctly.

% curl -V
curl 7.64.1 (x86_64-apple-darwin19.0) libcurl/7.64.1 (SecureTransport) LibreSSL/2.8.3 zlib/1.2.11 nghttp2/1.39.2
Release-Date: 2019-03-27
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp smb smbs smtp smtps telnet tftp
Features: AsynchDNS GSS-API HTTP2 HTTPS-proxy IPv6 Kerberos Largefile libz MultiSSL NTLM NTLM_WB SPNEGO SSL UnixSockets

Running curl with -v returns this for a failed download (after authentication and other house keeping):

> A003 SELECT Spam
< * 8 EXISTS
< * 0 RECENT
< * FLAGS (\Answered \Flagged \Draft \Deleted \Seen)
< * OK [PERMANENTFLAGS (\Answered \Flagged \Draft \Deleted \Seen \*)] Ok
< * OK [UIDVALIDITY 1573031905] Ok
< * OK [UIDNEXT 41] Ok
< * OK [HIGHESTMODSEQ 89] Ok
< * OK [URLMECH INTERNAL] Ok
< * OK [ANNOTATIONS 65536] Ok
< A003 OK [READ-WRITE] Completed
> A004 FETCH 33 BODY[]
< A004 NO No matching messages (0.000 sec)
> A005 LOGOUT
< * BYE LOGOUT received
< A005 OK Completed
* Closing connection 0
curl: (78) Remote file not found

Cheers
Jim