Typing "?" or "+" (without even hitting 'Enter') produces this exception (Win10/Linux/Ubuntu)

[nivanov]

▶ ?
java.util.regex.PatternSyntaxException: Dangling meta character '?' near index 0
?.*
^
at java.base/java.util.regex.Pattern.error(Pattern.java:2027)
at java.base/java.util.regex.Pattern.sequence(Pattern.java:2202)
at java.base/java.util.regex.Pattern.expr(Pattern.java:2068)
at java.base/java.util.regex.Pattern.compile(Pattern.java:1782)
at java.base/java.util.regex.Pattern.(Pattern.java:1428)
at java.base/java.util.regex.Pattern.compile(Pattern.java:1094)
at org.jline.reader.impl.LineReaderImpl.matchPreviousCommand(LineReaderImpl.java:3971)
at org.jline.reader.impl.LineReaderImpl.getDisplayedBufferWithPrompts(LineReaderImpl.java:4005)
at org.jline.reader.impl.LineReaderImpl.redisplay(LineReaderImpl.java:3863)
at org.jline.reader.impl.LineReaderImpl.redisplay(LineReaderImpl.java:3799)
at org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:694)
at org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:454)
...

[mattirn]

Thanks, char '+' was still missing from the list of the chars to be escaped. #570