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regexjava-8nashorn

Strange exception with Java8 Nashorn regex engine

I ran into a strange java.lang.ArrayIndexOutOfBoundsException: 64 error while parsing text using Nashorn Javascript engine. To reproduce the problem in JJS:

var col0 = " xxxx,         xxx xxxxxx xxxxxxxxx xxxxxxx, xxxx xxxxx xxxxx ";
var name = /([^\s]+),(.*)+/.exec(col0);

Some other variants of the test string also cause the same exception, for example.

var col0 = "x,         xxxxxxxxxx xxxxxxxxx xxxxxxx, xxxx xxxxx xxxxx ";

Happens with JDK8 versions 25, 31 and 40ea (on Windows 8).

Solution

  • This is a bug in our regexp implementation. I've filed a bug for it:

    https://bugs.openjdk.java.net/browse/JDK-8073818

    Update: You can use the -Dnashorn.regexp.impl=jdk option as a workaround. This makes Nashorn use the java.util.regex package instead of Joni which doesn't show this bug.