Method http has died unexpectedly! Problem installing sublime text 3.0

I am trying to install Sublime Text 3.0 on Ubuntu 16.0 (via crouton). I follow the instructions but I can't get sudo apt-get update to work. I get the following error: Method https has died unexpectedly! E: Sub-process https received a segmentation fault. If I remove the file which is created on etc/apt/sources.list.d/* the problem disappears and I can get sudo apt-get update to run with no problems. But I can't install the new version of ST! Any ideas? This issue is, I think, linked to the following: https://github.com/dnschneid/crouton/issues/2688