MockedResourceResolverImplTest.testMapping fails under Java 8 with Illegal group reference: group index is missing

java.lang.IllegalArgumentException: Illegal group reference: group index is missing
	at java.util.regex.Matcher.appendReplacement(Matcher.java:819)
	at java.util.regex.Matcher.replaceFirst(Matcher.java:1004)
	at org.apache.sling.resourceresolver.impl.mapping.MapEntry.replace(MapEntry.java:276)
	at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.map(ResourceResolverImpl.java:479)
	at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.map(ResourceResolverImpl.java:369)
	at org.apache.sling.resourceresolver.impl.MockedResourceResolverImplTest.testMapping(MockedResourceResolverImplTest.java:489)

946 [main] INFO org.apache.sling.resourceresolver.impl.mapping.MapEntry - createMapEntry: Configuration has external redirect to http://www.example.com/; not creating mapping for configuration in /etc/map/http/example.com.80
946 [main] INFO org.apache.sling.resourceresolver.impl.mapping.MapEntry - createMapEntry: Configuration has external redirect to http://www.example.com/; not creating mapping for configuration in /etc/map/http/any_example.com.80
947 [main] INFO org.apache.sling.resourceresolver.impl.mapping.MapEntry - createMapEntry: URL localhost\.\d*/cgi-bin/ contains a regular expression; not creating mapping for configuration in /etc/map/http/example.com.80/cgi-bin
947 [main] INFO org.apache.sling.resourceresolver.impl.mapping.MapEntry - createMapEntry: URL localhost\.\d*/gateway/ contains a regular expression; not creating mapping for configuration in /etc/map/http/example.com.80/gateway
947 [main] INFO org.apache.sling.resourceresolver.impl.mapping.MapEntry - createMapEntry: URL localhost\.\d*/stories/ contains a regular expression; not creating mapping for configuration in /etc/map/http/example.com.80/stories
947 [main] INFO org.apache.sling.resourceresolver.impl.mapping.MapEntry - createMapEntry: URL localhost\.\d* contains a regular expression; not creating mapping for configuration in /etc/map/http/localhost_any