dual-ssl and large-ssl tests fail on ubuntu 16.04

[iain-buclaw-sociomantic]

Tests all pass on v3.6 and v3.7, but these two fail on v3.7.1

That makes bisecting easy (there's only been one code change between the two releases a50ae14)

Looks like there's even CI for ubuntu 16.04, and it's also failing with the same problem.
https://travis-ci.org/github/grobian/carbon-c-relay/jobs/705083939

Reproducible in a container:

docker run -it --rm ubuntu:xenial bash

apt-get update && apt-get install -y \
  autoconf build-essential libtool git libonig-dev libssl-dev zlib1g-dev \
  pkg-config liblz4-tool help2man;
git clone https://github.com/grobian/carbon-c-relay;
pushd carbon-c-relay;
autoreconf;
./configure;
make -j8;
make test -j8;

[iain-buclaw-sociomantic]

The tests do not fail on ubuntu 18.04 (Bionic), so the change triggered something specific to Xenial. This can be checked by using the same reproducer as above, but starting a container with the ubuntu:bionic image instead.

[grobian]

Ok, I thought this was a travis issue, since it didn't occur on other platforms.

[iain-buclaw-sociomantic]

Ok, I thought this was a travis issue, since it didn't occur on other platforms.

I think you need to have more faith in your CI. :-)

Would it be useful to expand the testing currently done? I see that travis now supports 18.04 as well now, along with other architectures (arm64, ppc64le, s390x).