HippoPathParser throws exception for short free search paths

When for example path is:

/myfacnav[

]

then this throws OOBE. [

] does succeed again.

java.lang.StringIndexOutOfBoundsException: String index out of range: 61
at java.lang.String.substring(String.java:1934)
at org.hippoecm.repository.jackrabbit.HippoPathParser.parse(HippoPathParser.java:217)