Exception in thread "main" java.lang.StringIndexOutOfBoundsException

[wp2000x]

Hello, i got an exception from an warc from archive.org?

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: index -1, length 0
        at java.base/java.lang.String.checkIndex(String.java:4563)
        at java.base/java.lang.AbstractStringBuilder.charAt(AbstractStringBuilder.java:351)
        at java.base/java.lang.StringBuilder.charAt(StringBuilder.java:91)
        at org.netpreserve.urlcanon.SemanticPreciseCanonicalizer.removeLeadingTrailingAndDuplicateChars(SemanticPreciseCanonicalizer.java:90)
        at org.netpreserve.urlcanon.AggressiveCanonicalizer.removeRedundantAmpersandsFromQuery(AggressiveCanonicalizer.java:100)
        at org.netpreserve.urlcanon.AggressiveCanonicalizer.canonicalize(AggressiveCanonicalizer.java:46)
        at org.netpreserve.warc2html.Warc2Html.makeUrlKey(Warc2Html.java:75)
        at org.netpreserve.warc2html.Warc2Html.rewriteLink(Warc2Html.java:259)
        at org.netpreserve.warc2html.Warc2Html.lambda$writeTo$0(Warc2Html.java:235)
        at org.netpreserve.warc2html.LinkRewriter.rewriteHTML(LinkRewriter.java:56)
        at org.netpreserve.warc2html.Warc2Html.writeTo(Warc2Html.java:235)
        at org.netpreserve.warc2html.Warc2Html.main(Warc2Html.java:70)