It looks like there was a segmentation fault during the installation:
May 27 19:00:05 ubuntu kernel: [ 1381.908907] debconf-communi[6967]: segfault at 0 ip (null) sp 00007fffef657ab8 error 14 in perl[400000+2000]
It looks like there was a segmentation fault during the installation:
May 27 19:00:05 ubuntu kernel: [ 1381.908907] debconf- communi[ 6967]: segfault at 0 ip (null) sp 00007fffef657ab8 error 14 in perl[400000+2000]