Segfault when trying to send email

[pgmillon]

Reproduction scenario:

$ docker run -it --rm ubuntu:xenial
root@d260a71663c1:/# apt install -y telnet wget openjdk-8-jdk-headless
root@d260a71663c1:/# wget https://github.com/loopingz/aws-smtp-relay/releases/download/v1.2.0/aws-smtp-relay_1.2.0_all.deb
root@d260a71663c1:/# apt install -y ./aws-smtp-relay_1.2.0_all.deb
root@d260a71663c1:/# /usr/bin/aws-smtp-relay -b 127.0.0.1 -p 25
[main] INFO org.subethamail.smtp.server.SMTPServer - SMTP server /127.0.0.1:25 starting
[org.subethamail.smtp.server.ServerThread /127.0.0.1:25] INFO org.subethamail.smtp.server.ServerThread - SMTP server /127.0.0.1:25 started
Segmentation fault (core dumped)

root@d260a71663c1:/# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 d260a71663c1 ESMTP SubEthaSMTP null
HELO void.com
250 d260a71663c1
mail from: pgmillon@void.com

[major-fire]

Can confirm this is also showing on an Amazon Linux 1 instance:

root@host: /tmp$ telnet localhost 10024
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 ip-172-19-2-6 ESMTP SubEthaSMTP null
helo test.example.com
250 ip-172-19-2-6
mail from:<someone@example.com>
Connection closed by foreign host.

root@host: ~$ ./aws-smtp-relay -p 10024
[main] INFO org.subethamail.smtp.server.SMTPServer - SMTP server /127.0.0.1:10024 starting
[org.subethamail.smtp.server.ServerThread /127.0.0.1:10024] INFO org.subethamail.smtp.server.ServerThread - SMTP server /127.0.0.1:10024 started
Segmentation fault

[loopingz]

I revert to full Java implementation as GraalVM was segfaulting for a reason unknown might be related to #28