Null pointer on cancelling login with captcha screen

I tried to log in on (may or may not have been the correct password), it redirected me to the login screen again but this time with the captcha thingy. I pressed cancel and got this:

java.lang.NullPointerException
at com.atlassian.bamboo.build.BuildResultsAction.sanitiseBuildNumber(BuildResultsAction.java:103)
at com.atlassian.bamboo.build.BuildResultsAction.getBuildNumber(BuildResultsAction.java:77)
at com.atlassian.bamboo.build.BuildResultsAction.doExecute(BuildResultsAction.java:155)
at com.atlassian.bamboo.ww2.BambooActionSupport.execute(BambooActionSupport.java:898)
at sun.reflect.GeneratedMethodAccessor294.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)