com.github.jknack.handlebars.helper.LookupHelper NullPointerException

[jchobantonov-runbuggy]

If you have:

lookup obj person.id

where we want to lookup into obj based on person.id as a key a NullPointerException could happen from lookup function:

java.lang.NullPointerException
inline@3a250195:271:21
at com.github.jknack.handlebars.helper.LookupHelper.apply(LookupHelper.java:60)

This line:

Object lookup = ctx.get(options.param(0).toString());

is the issue where options.param(0) could be null

since we already check for this:

    if (options.params.length <= 0) {
      return context;
    }

in order to not throw exception I think following should be added as well:

    if (options.params.length <= 0 || options.param(0) == null) {
      return context;
    }