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java.lang.NullPointerException: 	at java.util.regex.Matcher.getTextLength(Matcher.java:1140)	at java.util.regex.Matcher.reset(Matcher.java:291)	at java.util.regex.Matcher.(Matcher.java:211)	at java.util.regex.Pattern.matcher(Pattern.java:888)	at com.atlassian.bamboo.v2.trigger.DefaultChangeDetectionManager.filterExcludedChangesets(DefaultChangeDetectionManager.java:597)	at com.atlassian.bamboo.v2.trigger.DefaultChangeDetectionManager.collectChangesSinceLastBuild(DefaultChangeDetectionManager.java:268)	at com.atlassian.bamboo.v2.trigger.DefaultChangeDetectionManager.collectChangesSinceRevisions(DefaultChangeDetectionManager.java:218)	at com.atlassian.bamboo.v2.trigger.DefaultChangeDetectionManager.collectChangesSinceRevisions(DefaultChangeDetectionManager.java:136)	at com.atlassian.bamboo.v2.trigger.DefaultChangeDetectionManager.collectAllChangesSinceLastBuild(DefaultChangeDetectionManager.java:123)	at com.atlassian.bamboo.v2.trigger.ManualBuildDetectionAction.performDelayedChangeDetection(ManualBuildDetectionAction.java:109)	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl$2.getChainState(ChainExecutionManagerImpl.java:199)	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.tryStartChainState(ChainExecutionManagerImpl.java:252)	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.delayedStart(ChainExecutionManagerImpl.java:189)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)	at $Proxy78.delayedStart(Unknown Source)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)	at $Proxy79.delayedStart(Unknown Source)	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl$1$1$1.call(PlanExecutionManagerImpl.java:262)	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl$1$1$1.call(PlanExecutionManagerImpl.java:258)	at com.atlassian.util.concurrent.ManagedLocks$ManagedLockImpl.withLock(ManagedLocks.java:324)	at com.atlassian.bamboo.plan.PlanExecutionLockServiceImpl.lock(PlanExecutionLockServiceImpl.java:77)	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl.doWithProcessLock(PlanExecutionManagerImpl.java:429)	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl.access$200(PlanExecutionManagerImpl.java:44)	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl$1$1.run(PlanExecutionManagerImpl.java:257)	at com.atlassian.bamboo.build.pipeline.concurrent.NamedThreadFactory$2.run(NamedThreadFactory.java:52)	at java.lang.Thread.run(Thread.java:662)