Bug in Sprint Burndown Chart

As a user I want the rendering of the burn-down chart to be reliable -- failing that, to give me a hint as to why it's failing -- so I don't have to go figure out what's wrong with my project.

Here's from the catalina.out:

FATAL AHttpServlet         GET failed: scrum.server.sprint.SprintBurndownChartServlet -> 
java.lang.IllegalArgumentException: snapshots.isEmpty()
    at scrum.server.common.BurndownChart.createSprintBurndownChartDataset(BurndownChart.java:212)
    at scrum.server.common.BurndownChart.writeSprintBurndownChart(BurndownChart.java:125)
    at scrum.server.common.BurndownChart.writeSprintBurndownChart(BurndownChart.java:93)
    at scrum.server.common.BurndownChart.writeSprintBurndownChart(BurndownChart.java:80)
    at scrum.server.sprint.SprintBurndownChartServlet.onRequest(SprintBurndownChartServlet.java:31)
    at scrum.server.common.AHttpServlet.doGet(AHttpServlet.java:33)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Thread.java:636)
 | app:kunagi > session:dcuddihy

Statement from Kunagi Team

This bug occurs, when the current sprint has wrong dates set.

Status

Issue is closed for Release 0.14.

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