null value in nested context doesn't cover variable in outer context

[Tupteq]

If variable is defined in inner context, but it's value is null, then outer context is searched.

Example: context (HashMap): {"a": "outer", "b": [{"a":null}]} Template: {{#b}}{{a}}{{/b}} Result: outer

Online JS tester returns no result here, so it probably should return defaultValue/nullValue (if set) or throw an exception. I also checked official Objective-C implementation and it worked as JS version.

If inner "a" is set to anything else, it behaves as expected.

[samskivert]

You must be using an earlier version of JMustache. This works as you specify in the latest code:

@Test public void testIssue40 () {
    String tmpl = "{{#b}}{{a}}{{/b}}";
    Object ctx = context("a", "outer", "b", context("a", null));
    // this one will use 'null' for the inner 'a' because nullValue() is supplied
    test(Mustache.compiler().nullValue("null"), "null", tmpl, ctx);
    // this one will throw a MustacheException because no nullValue() is supplied
    try {
        test(Mustache.compiler(), "", tmpl, ctx);
        fail();
    } catch (MustacheException me) {} // expected
}