String Index Error in shortdoi matcher.

[afandian]

Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  [async-thread-macro-4] ERROR event-data-percolator.queue - Exception processing queue message: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at java.lang.String.substring(String.java:1931)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at java.lang.reflect.Method.invoke(Method.java:498)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at event_data_percolator.matchers.shortdoi_url$match_shortdoi_url.invokeStatic(shortdoi_url.clj:10)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at event_data_percolator.matchers.shortdoi_url$match_shortdoi_url.invoke(shortdoi_url.clj:6)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at event_data_percolator.matchers.shortdoi_url$match_shortdoi_url_candidate.invokeStatic(shortdoi_url.clj:18)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at event_data_percolator.matchers.shortdoi_url$match_shortdoi_url_candidate.invoke(shortdoi_url.clj:15)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at event_data_percolator.match$match_candidate.invokeStatic(match.clj:30)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at event_data_percolator.match$match_candidate.invoke(match.clj:27)
Apr 25 17:36:51 d26058f01906 percolator-process-prod.9.qwkafcl38e0ojqgtdbrwm2mdf:  	at event_data_percolator.action$match_candidates$fn__12659$fn__12660.invoke(action.clj:60)