java.lang.StringIndexOutOfBoundsException resulting in WordUtils.wrap

Commons-lang3:3.5

Issue code:
String appName = "Google Play Store";
appName = WordUtils.wrap(appName, appName.length()/2);
System.out.println(appName);

Resulting exception:
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: -3
at java.lang.String.substring(String.java:1967)
at org.apache.commons.lang3.text.WordUtils.wrap(WordUtils.java:328)
at org.apache.commons.lang3.text.WordUtils.wrap(WordUtils.java:176)
at org.apache.commons.lang3.text.WordUtils.wrap(WordUtils.java:100)
at removedups.Main2.main(Main2.java:32)

This exception does not occur in commons-lang3:3.4 though