awless: Running out of memory with 12GB available

Running awless -e sync with 12GB of memory available ends up in the process being killed because of an OOM situation. Would have expected that 12GB is plenty of memory for the task.

~/go/src/github.com/wallix/awless$ uname -a
Linux ubuntu 3.13.0-98-generic #145-Ubuntu SMP Sat Oct 8 20:13:07 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

~/go/src/github.com/wallix/awless$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.5 LTS
Release:        14.04
Codename:       trusty

~/go/src/github.com/wallix/awless$ free
             total       used       free     shared    buffers     cached
Mem:      16427688    2612424   13815264        652        260      27940
-/+ buffers/cache:    2584224   13843464
Swap:      1046524    1046524          0

~/go/src/github.com/wallix/awless$ ./awless --version
awless version=v0.1.1

~/go/src/github.com/wallix/awless$ rm -rf ~/.awless

~/go/src/github.com/wallix/awless$ ./awless -e sync
First install. Welcome!

Found existing AWS region 'us-east-1'. Setting it as your default region.
Region updated to 'us-east-1'.
You might want to update your default AMI with `awless config set instance.image $(awless search images amazonlinux --id-only --silent)`
Syncing new region...
[extra]   sync: fetched lambda service took 406.591864ms
[extra]   sync: fetched cloudformation service took 408.829508ms
[extra]   sync: fetched cdn service took 489.701489ms
[extra]   sync: fetched dns service took 895.959112ms
[extra]   sync: fetched messaging service took 1.280953266s
[extra]   sync: fetched infra service took 3.58098968s
Killed

~/go/src/github.com/wallix/awless$ tail /var/log/syslog
Jun 30 13:01:00 localhost kernel: [77434.411864] [21886]     0 21886      376        0       5       16             0 sh
Jun 30 13:01:00 localhost kernel: [77434.411865] [21949]     0 21949  1489483    64503     295    17131             0 java
Jun 30 13:01:00 localhost kernel: [77434.411866] [25321]  1000 25321     7042     1902      20        0             0 bash
Jun 30 13:01:00 localhost kernel: [77434.411867] [27581]  1000 27581     2386       43      11        0             0 less
Jun 30 13:01:00 localhost kernel: [77434.411868] [27596]  1000 27596  9187110  3412059   14185        0             0 awless
Jun 30 13:01:00 localhost kernel: [77434.411869] Out of memory: Kill process 27596 (awless) score 784 or sacrifice child
Jun 30 13:01:00 localhost kernel: [77434.411889] Killed process 27596 (awless) total-vm:36748440kB, anon-rss:13648236kB, file-rss:0kB