Empty line at the end of a sass css file make the vaadin compiler fails

15:04:40,510 ERROR [ExceptionHandlingProcessorDecorator] Failed to process the resource: ro.isdc.wro.model.resource.Resource@7c02a325[CSS,nuxeo:header.scss,true] using processor: org.nuxeo.theme.styling.wro.SassCssFlavorProcessor@10fa587d. Reason: 4096
15:22:31,843 ERROR [SassCssFlavorProcessor] Error while serving resource nuxeo:header.scss
java.lang.ArrayIndexOutOfBoundsException: 4096
	at com.vaadin.sass.internal.parser.Generic_CharStream.readChar(Generic_CharStream.java:201)
	at com.vaadin.sass.internal.parser.Generic_CharStream.BeginToken(Generic_CharStream.java:144)
	at com.vaadin.sass.internal.parser.ParserTokenManager.getNextToken(ParserTokenManager.java:5672)
	at com.vaadin.sass.internal.parser.Parser.jj_ntk(Parser.java:9003)
	at com.vaadin.sass.internal.parser.Parser.styleRule(Parser.java:2185)
	at com.vaadin.sass.internal.parser.Parser.topLevelDeclaration(Parser.java:591)
	at com.vaadin.sass.internal.parser.Parser.parserUnit(Parser.java:487)
	at com.vaadin.sass.internal.parser.Parser.parseStyleSheet(Parser.java:122)
	at org.nuxeo.theme.styling.wro.SassCssFlavorProcessor.process(SassCssFlavorProcessor.java:102)
	at org.nuxeo.theme.styling.wro.AbstractFlavorProcessor.process(AbstractFlavorProcessor.java:54)
	at ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator.process(ProcessorDecorator.java:89)
	at ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator.process(ProcessorDecorator.java:89)
	at ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator.process(ProcessorDecorator.java:89)
	at ro.isdc.wro.model.resource.processor.decorator.SupportAwareProcessorDecorator.process(SupportAwareProcessorDecorator.java:39)
	at ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator.process(ProcessorDecorator.java:89)
	at ro.isdc.wro.model.resource.processor.decorator.ExceptionHandlingProcessorDecorator.process(ExceptionHandlingProcessorDecorator.java:56)
	at ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator.process(ProcessorDecorator.java:89)
	at ro.isdc.wro.model.resource.processor.decorator.BenchmarkProcessorDecorator.process(BenchmarkProcessorDecorator.java:44)
	at ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator.process(ProcessorDecorator.java:89)
	at ro.isdc.wro.model.resource.processor.decorator.DefaultProcessorDecorator.process(DefaultProcessorDecorator.java:42)
	at ro.isdc.wro.model.group.processor.PreProcessorExecutor$2.process(PreProcessorExecutor.java:228)
	at ro.isdc.wro.model.group.processor.PreProcessorExecutor.applyPreProcessors(PreProcessorExecutor.java:207)
	at ro.isdc.wro.model.group.processor.PreProcessorExecutor.processAndMerge(PreProcessorExecutor.java:103)
	at ro.isdc.wro.model.group.processor.PreProcessorExecutor.processAndMerge(PreProcessorExecutor.java:77)
	at ro.isdc.wro.model.group.processor.GroupsProcessor.process(GroupsProcessor.java:83)
	at ro.isdc.wro.cache.support.DefaultSynchronizedCacheStrategyDecorator.loadValue(DefaultSynchronizedCacheStrategyDecorator.java:101)
	at ro.isdc.wro.cache.support.DefaultSynchronizedCacheStrategyDecorator.loadValue(DefaultSynchronizedCacheStrategyDecorator.java:35)
	at ro.isdc.wro.cache.support.AbstractSynchronizedCacheStrategyDecorator.get(AbstractSynchronizedCacheStrategyDecorator.java:55)
	at ro.isdc.wro.manager.ResourceBundleProcessor.serveProcessedBundle(ResourceBundleProcessor.java:63)
	at ro.isdc.wro.manager.WroManager.process(WroManager.java:159)
	at ro.isdc.wro.http.WroFilter.processRequest(WroFilter.java:335)
	at ro.isdc.wro.http.WroFilter.doFilter(WroFilter.java:289)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at ro.isdc.wro.http.WroContextFilter.doFilter(WroContextFilter.java:64)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoThreadTrackerFilter.doFilter(NuxeoThreadTrackerFilter.java:28)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.core.management.jtajca.internal.Log4jWebFilter.doFilter(Log4jWebFilter.java:67)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.platform.ui.web.rest.FancyURLFilter.doFilter(FancyURLFilter.java:118)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoRequestControllerFilter.doFilter(NuxeoRequestControllerFilter.java:140)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.webdav.service.WIRequestFilter.doFilter(WIRequestFilter.java:59)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.platform.web.common.requestcontroller.filter.NuxeoCorsFilter.doFilter(NuxeoCorsFilter.java:49)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.platform.web.common.exceptionhandling.NuxeoExceptionFilter.doFilter(NuxeoExceptionFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.nuxeo.ecm.platform.web.common.encoding.NuxeoEncodingFilter.doFilter(NuxeoEncodingFilter.java:73)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)