Bamboo final task not executed when initial task failed

simple	25-Oct-2014 10:00:15	Cloning repository `/local/atlassian/bamboo-home/xml-data/build-dir/_hg-repositories-cache/6753e14df42004e60ab7056d10788200f2caade9' to directory '/local/atlassian/bamboo-home/xml-data/build-dir/LOAD-DES53-JOB1/MLC'
simple	25-Oct-2014 10:00:16	Warning: failed to retrieve source code (com.atlassian.bamboo.plugins.hg.HgCommandException: command /opt/mercurial/latest/hg clone --noupdate --config 'ui.ssh=ssh -o StrictHostKeyChecking=no -o BatchMode=yes' /local/atlassian/bamboo-home/xml-data/build-dir/_hg-repositories-cache/6753e14df42004e60ab7056d10788200f2caade9 /local/atlassian/bamboo-home/xml-data/build-dir/LOAD-DES53-JOB1/MLC failed. Working directory was `/local/atlassian/bamboo-home/xml-data/build-dir/LOAD-DES53-JOB1/MLC'. stderr: abort: destination '/local/atlassian/bamboo-home/xml-data/build-dir/LOAD-DES53-JOB1/MLC' is not empty stdout: ), trying to recover...
error	25-Oct-2014 10:00:16	Failed to clean source directory '/local/atlassian/bamboo-home/xml-data/build-dir/LOAD-DES53-JOB1/MLC' Unable to delete file: /local/atlassian/bamboo-home/xml-data/build-dir/LOAD-DES53-JOB1/MLC/deployTools/target/Releases/vMLC12_0_0/patches/3p/jacorb/2.3.1/source/jacorb-2.3.1-source.tar