[jira] [Created] (LUCENE-10430) Literal double quotes cause exception in class RegExp

["Holger Rehn (Jira)" <ji...@apache.org>]

Holger Rehn created LUCENE-10430:
------------------------------------

             Summary: Literal double quotes cause exception in class RegExp
                 Key: LUCENE-10430
                 URL: https://issues.apache.org/jira/browse/LUCENE-10430
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/other
    Affects Versions: 9.0
            Reporter: Holger Rehn


Class org.apache.lucene.util.automaton.RegExp fails to parse valid regular expressions that contain double quotes. This of course affects corresponding RegexpQuerys, as well.

Example: 
{code:java}
Query  q = new RegexpQuery( new Term( "field", "a\"b" ) );
RegExp r = new RegExp( "a\"b" );{code}
Both fail with:
{code:java}
java.lang.IllegalArgumentException: expected '"' at position 3
    at org.apache.lucene.util.automaton.RegExp.parseSimpleExp(RegExp.java:1299)
    at org.apache.lucene.util.automaton.RegExp.parseCharClassExp(RegExp.java:1229)
    at org.apache.lucene.util.automaton.RegExp.parseComplExp(RegExp.java:1218)
    at org.apache.lucene.util.automaton.RegExp.parseRepeatExp(RegExp.java:1192)
    at org.apache.lucene.util.automaton.RegExp.parseConcatExp(RegExp.java:1185)
    at org.apache.lucene.util.automaton.RegExp.parseConcatExp(RegExp.java:1187)
    at org.apache.lucene.util.automaton.RegExp.parseInterExp(RegExp.java:1179)
    at org.apache.lucene.util.automaton.RegExp.parseUnionExp(RegExp.java:1173)
    at org.apache.lucene.util.automaton.RegExp.<init>(RegExp.java:496)
    ...{code}
Unfortunately I don't see an easy workaround. Safely removing/replacing double quotes from the (user typed) regular expression is not an easy undertaking as it would require us to completely understand the regex.



--
This message was sent by Atlassian Jira
(v8.20.1#820001)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@lucene.apache.org
For additional commands, e-mail: issues-help@lucene.apache.org