Browsing to a tinyurl link without an identifier throws NPE

http://localhost:8080/confluence/a 

http://localhost:8080/confluence/x

 System Error
A system error has occurred - our apologies!

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   1. a description of your problem and what you were doing at the time it occurred
   2. cut & paste the error and system information found below
   3. attach the application server log file (if possible). 

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Cause:
java.lang.NullPointerException
 at com.atlassian.confluence.servlet.TinyUrlServlet.doGet(TinyUrlServlet.java:22)

Stack Trace: [hide]

java.lang.NullPointerException
	at com.atlassian.confluence.servlet.TinyUrlServlet.doGet(TinyUrlServlet.java:22)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.atlassian.confluence.util.LoggingContextFilter.doFilter(LoggingContextFilter.java:46)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
	at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:182)