This is a Linux error code which you may see on CircleCI when your container runs out of memory. Containers are given 4GB of RAM by default. If your build process consumes all of the container memory your build will fail. We have a guide on troubleshooting out-of-memory issues which you can read about.
With CircleCI 2.0 you can use the resource_class configuration option to control the available resources for your build containers.
resource_class must be enabled on your account before you can use it. Submit a support ticket requesting to enable this feature for your project.