Encounter ArrayIndexOutOfBoundsException in the corner case delimiter or end-of-line happened to be the leading character of a segment buffer

[wli600]

We encountered this stack trace while using release 2.4.3,

ArrayIndexOutOfBoundsException
com.fasterxml.jackson.dataformat.csv.impl.TextBuffer.finishAndReturn(TextBuffer.java:416)
com.fasterxml.jackson.dataformat.csv.impl.CsvReader._nextUnquotedString(CsvReader.java:694)
com.fasterxml.jackson.dataformat.csv.impl.CsvReader.nextString(CsvReader.java:610)
com.fasterxml.jackson.dataformat.csv.CsvParser._handleUnnamedValue(CsvParser.java:543)
com.fasterxml.jackson.dataformat.csv.CsvParser.nextToken(CsvParser.java:423)
com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer.deserialize(ObjectArrayDeserializer.java:144)
com.fasterxml.jackson.databind.deser.std.ObjectArrayDeserializer.deserialize(ObjectArrayDeserializer.java:18)
com.fasterxml.jackson.databind.MappingIterator.nextValue(MappingIterator.java:189)

Able to repro and will submit a PR for this issue