String: 'http://user:pass@host.com host.com' causes exception

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -2
at java.lang.AbstractStringBuilder.substring(AbstractStringBuilder.java:908)
at java.lang.StringBuilder.substring(StringBuilder.java:76)
at java.lang.AbstractStringBuilder.substring(AbstractStringBuilder.java:854)
at java.lang.StringBuilder.substring(StringBuilder.java:76)
at com.linkedin.urls.detection.UrlDetector.readDefault(UrlDetector.java:191)
at com.linkedin.urls.detection.UrlDetector.detect(UrlDetector.java:142)
at com.mycompany.url.UrlTest.main(UrlTest.java:26)

Start by reproducing the reported input and trace detection through UrlDetector.detect to UrlDetector.java:191, where the stack trace shows the exception. Inspect the surrounding URL parsing logic and verify that this input no longer raises StringIndexOutOfBoundsException while detection completes normally.

Written by the indexing model from the issue text.