I have a project that is configured to git fetch from Atlassian Stash repository. It then runs buildr to compile it. There are many times that the whole process fails with the following:

FATAL: String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(String.java:1911)
at hudson.plugins.git.GitChangeSet.isoDateFormat(GitChangeSet.java:179)
at hudson.plugins.git.GitChangeSet.parseCommit(GitChangeSet.java:118)
at hudson.plugins.git.GitChangeSet.<init>(GitChangeSet.java:89)
at hudson.plugins.git.GitChangeLogParser.parseCommit(GitChangeLogParser.java:73)
at hudson.plugins.git.GitChangeLogParser.parse(GitChangeLogParser.java:57)
at hudson.plugins.git.GitChangeLogParser.parse(GitChangeLogParser.java:44)
at hudson.plugins.git.GitChangeLogParser.parse(GitChangeLogParser.java:25)
at hudson.scm.ChangeLogParser.parse(ChangeLogParser.java:57)
at hudson.model.AbstractBuild.calcChangeSet(AbstractBuild.java:894)
at hudson.model.AbstractBuild.getChangeSet(AbstractBuild.java:862)
at hudson.model.AbstractBuild.getCulprits(AbstractBuild.java:349)
at hudson.model.AbstractBuild.getCulprits(AbstractBuild.java:346)
at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:687)
at hudson.model.Run.execute(Run.java:1743)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:89)
at hudson.model.Executor.run(Executor.java:240)

Sometimes the process fails immediately after it checks out the revision. Other times, it will finish completely but then display this output at the end and 'fail' even though it completed.