Exception when running the example parse shell script from the README

[brianjester]

Running the example parse shell script from the README produces an exception

git clone https://github.com/tshprecher/antlr_psql.git
cd antlr_psql
mvn compile
./scripts/parse "selectttt 1" stmt

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.lang.String.charAt(String.java:658)
	at org.antlr.v4.Tool.handleArgs(Tool.java:207)
	at org.antlr.v4.Tool.<init>(Tool.java:195)
	at org.antlr.v4.Tool.main(Tool.java:164)

[TOKENS]
  IDENTIFIER           'selectttt'
  INTEGER_LITERAL      '1'
  EOF                  '<EOF>'

[PARSE-TREE]
  (stmt
    (abort_stmt
      (identifier selectttt)))

java -version
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (AdoptOpenJDK)(build 1.8.0_212-b03)
OpenJDK 64-Bit Server VM (AdoptOpenJDK)(build 25.212-b03, mixed mode)

• also get the same exception for a syntactically correct SQL statement.

./scripts/parse "select 1" stmt
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 0
	at java.lang.String.charAt(String.java:658)
	at org.antlr.v4.Tool.handleArgs(Tool.java:207)
	at org.antlr.v4.Tool.<init>(Tool.java:195)
	at org.antlr.v4.Tool.main(Tool.java:164)

[TOKENS]
  SELECT               'select'
  INTEGER_LITERAL      '1'
  EOF                  '<EOF>'

[PARSE-TREE]
  (stmt
    (select_stmt select
      (selector_clause
        (column_list
          (expr 1)))))