Sep 21 10:11:08.986 ERRO this task or one of its parent failed!
Sep 21 10:11:08.986 ERRO failed to generate lockfile for futures-core-preview-0.3.0-alpha.6
Sep 21 10:11:08.986 ERRO caused by: unable to generate lockfile for futures-core-preview-0.3.0-alpha.6
Sep 21 10:11:08.986 ERRO caused by: command `"docker" "start" "-a" "f96c41d088165c6647c9ce841943cc80154703d9fd78f39f1b38d705595d9f4b"` failed