View issue blows up when user doesn't exist

java.lang.NullPointerException
at com.atlassian.studio.history.JiraBrowseHistoryManager$3.get(JiraBrowseHistoryManager.java:118)
at com.atlassian.studio.history.JiraBrowseHistoryManager.visitBrowseHistory(JiraBrowseHistoryManager.java:160)
at com.atlassian.studio.history.JiraBrowseHistoryManager.collectHistory(JiraBrowseHistoryManager.java:81)
at com.atlassian.studio.history.JiraBrowseHistoryManager.put(JiraBrowseHistoryManager.java:195)
at com.atlassian.studio.history.JiraBrowseHistory.addIssue(JiraBrowseHistory.java:59)
at com.atlassian.jira.web.action.IssueActionSupport.setCurrentIssue(IssueActionSupport.java:145)
at com.atlassian.jira.web.action.issue.AbstractIssueSelectAction.getIssue(AbstractIssueSelectAction.java:81)
at com.atlassian.jira.web.action.issue.ViewIssue.doExecute(ViewIssue.java:156)
at webwork.action.ActionSupport.execute(ActionSupport.java:153)
at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:54)
at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:132)
at com.atlassian.jira.web.dispatcher.JiraServletDispatcher.service(JiraServletDispatcher.java:178)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
...