LineReader encounters exception if tabs used in dummy terminal

[offbynull]

If in a dummy terminal and your input line is nothing but a single tab, the following exception occurs...

Exception in thread "main" java.lang.IllegalStateException: Shell error
	at com.xxx.shell.Shell.launch(Shell.java:82)
	at com.xxx.shell.Shell.main(Shell.java:70)
Caused by: java.lang.ArithmeticException: / by zero
	at org.jline.reader.impl.LineReaderImpl.toColumns(LineReaderImpl.java:4768)
	at org.jline.reader.impl.LineReaderImpl.toColumns(LineReaderImpl.java:4743)
	at org.jline.reader.impl.LineReaderImpl.computePost(LineReaderImpl.java:4708)
	at org.jline.reader.impl.LineReaderImpl.computePost(LineReaderImpl.java:4661)
	at org.jline.reader.impl.LineReaderImpl.doList(LineReaderImpl.java:4550)
	at org.jline.reader.impl.LineReaderImpl.doComplete(LineReaderImpl.java:4168)
	at org.jline.reader.impl.LineReaderImpl.expandOrComplete(LineReaderImpl.java:3894)
	at org.jline.reader.impl.LineReaderImpl$1.apply(LineReaderImpl.java:3506)
	at org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:587)
	at com.xxx.shell.Shell.readAndProcessCommands(Shell.java:196)
	at com.xxx.shell.Shell.launch(Shell.java:80)
	... 1 more