xref: /aosp_15_r20/external/libxml2/test/regexp/issue301 (revision 7c5688314b92172186c154356a6374bf7684c3ca) 
1=>(a{1,2}|ab){2}
2abab
3=>((1?[0-9]{1,2}|2[0-4][0-9]|25[0-5])\.){3}(1?[0-9]{1,2}|2[0-4][0-9]|25[0-5])
4192.168.254.0
5