Importing invalid XML prints irrelevant error

If I try to import a JIRA XML backup that is invalid (because it contains a control characters), the import fails with the message:

Failed to import data: Error in action: com.atlassian.jira.action.admin.DataImport@b2c64, result: error Exception occurred: java.lang.IndexOutOfBoundsException: Index: -1, Size: 0

and stacktrace:

2004-11-17 16:36:12,743 ERROR [jira.action.admin.DataImport] Exception occurred: java.lang.IndexOutOfBoundsException: Index: -1, Size: 0
java.lang.IndexOutOfBoundsException: Index: -1, Size: 0
at java.util.LinkedList.entry(LinkedList.java:360)
at java.util.LinkedList.get(LinkedList.java:303)
at com.atlassian.jira.action.admin.DataImport.processException(DataImport.java:199)
at com.atlassian.jira.action.admin.DataImport.doExecute(DataImport.java:91)
at webwork.action.ActionSupport.execute(ActionSupport.java:151)
at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:46)

As the stacktrace suggests, the error has nothing to do with the invalid character, but is actually a bug in JIRA's error handling code.