Though get_source.sh seems to work fine it outputs error/warning messages:

$ bash get_source.sh
get_source.sh: line 58: [: 1+20140303: integer expression expected
get_source.sh: line 64: [: 1+20140303: integer expression expected
No repositories to process.
# Repositories: . corba jaxp jaxws langtools jdk hotspot nashorn deploy install sponsors pubs
                    .: cd . && hg pull -u
                corba: cd corba && hg pull -u
                 jaxp: cd jaxp && hg pull -u
                jaxws: cd jaxws && hg pull -u
            langtools: cd langtools && hg pull -u
                  jdk: cd jdk && hg pull -u
              hotspot: cd hotspot && hg pull -u
              nashorn: cd nashorn && hg pull -u
                 jaxp: pulling from http://hg.openjdk.java.net/jdk9/dev/jaxp
                    .: pulling from http://hg.openjdk.java.net/jdk9/dev
                corba: pulling from http://hg.openjdk.java.net/jdk9/dev/corba
            langtools: pulling from http://hg.openjdk.java.net/jdk9/dev/langtools
              nashorn: pulling from http://hg.openjdk.java.net/jdk9/dev/nashorn
              hotspot: pulling from http://hg.openjdk.java.net/jdk9/dev/hotspot
                jaxws: pulling from http://hg.openjdk.java.net/jdk9/dev/jaxws
                  jdk: pulling from http://hg.openjdk.java.net/jdk9/dev/jdk