JiraIssueService.getIssuesForChangesets() fails when querying with a large number of changesets

java.lang.StringIndexOutOfBoundsException: String index out of range: -1
	at java.lang.String.substring(String.java:1911) ~[na:1.7.0_45]
	at com.atlassian.stash.integration.jira.impl.SimpleJiraIssue.<init>(SimpleJiraIssue.java:23) ~[na:na]
	at com.atlassian.stash.integration.jira.impl.JiraIssueServiceImpl.addSimpleIssues(JiraIssueServiceImpl.java:265) ~[na:na]
	at com.atlassian.stash.integration.jira.impl.JiraIssueServiceImpl.getIssuesIfLinked(JiraIssueServiceImpl.java:241) ~[na:na]
	at com.atlassian.stash.integration.jira.impl.JiraIssueServiceImpl.getIssuesForChangesets(JiraIssueServiceImpl.java:136) ~[na:na]
	at com.sun.proxy.$Proxy1518.getIssuesForChangesets(Unknown Source) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivitySummaryGenerator.findJiraKeys(ActivitySummaryGenerator.java:117) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivitySummaryGenerator.access$200(ActivitySummaryGenerator.java:33) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivitySummaryGenerator$1.perform(ActivitySummaryGenerator.java:71) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivitySummaryGenerator$1.perform(ActivitySummaryGenerator.java:62) ~[na:na]
	at com.atlassian.stash.internal.user.DefaultEscalatedSecurityContext.call(DefaultEscalatedSecurityContext.java:60) ~[stash-service-impl-3.0.0-SNAPSHOT.jar:na]
	at com.atlassian.stash.internal.summary.job.ActivitySummaryGenerator.generateContext(ActivitySummaryGenerator.java:61) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivityNotificationSender.generateActivitySummaryFor(ActivityNotificationSender.java:62) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivityNotificationSender.access$000(ActivityNotificationSender.java:22) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivityNotificationSender$1.apply(ActivityNotificationSender.java:55) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivityNotificationSender$1.apply(ActivityNotificationSender.java:53) ~[na:na]
	at com.atlassian.stash.internal.summary.MapUtils.generateMap(MapUtils.java:14) ~[na:na]
	at com.atlassian.stash.internal.summary.job.ActivityNotificationSender.send(ActivityNotificationSender.java:53) ~[na:na]
	at com.atlassian.stash.internal.summary.service.DefaultActivityNotificationService$NotificationJob.execute(DefaultActivityNotificationService.java:102) ~[na:na]
	at com.atlassian.stash.internal.sal.scheduling.PluginSchedulerAdapter$JobDescriptor.runJob(PluginSchedulerAdapter.java:130) ~[stash-platform-3.0.0-SNAPSHOT.jar:na]
	at com.atlassian.stash.internal.sal.scheduling.PluginSchedulerAdapter.runJob(PluginSchedulerAdapter.java:86) ~[stash-platform-3.0.0-SNAPSHOT.jar:na]
	at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:121) [atlassian-scheduler-core-1.1.0-STASHDEV-6226-2.jar:na]
	at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:101) [atlassian-scheduler-core-1.1.0-STASHDEV-6226-2.jar:na]
	at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:80) [atlassian-scheduler-core-1.1.0-STASHDEV-6226-2.jar:na]
	at com.atlassian.scheduler.quartz1.Quartz1Job.execute(Quartz1Job.java:33) [atlassian-scheduler-quartz1-1.1.0-STASHDEV-6226-2.jar:na]
	at org.quartz.core.JobRunShell.run(JobRunShell.java:223) [quartz-1.8.6.jar:na]
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549) [quartz-1.8.6.jar:na]
	... 20 frames trimmed