Error: Arguments to path.join must be strings while building gruntplugin template

[robertrossmann]

While trying to grunt-init gruntplugin I am getting the following error: Fatal error: Arguments to path.join must be strings

This only seems to happen if I provide custom value to Project git repository question. If I leave it at default, the script finishes successfully.

UPDATE: Further testing revealed and @jchris confirmed that this is related to a misspelled value in the Licenses question. Not sure, however, why it would fail for BSD-3-Clause.

I have no idea where to look in the code base, but here's the full stack trace that is shown upon the error. If there's more info I can provide just let me know.

Thanks for your help!

Please answer the following:
[?] Project name (grunt-npm-publish) 
[?] Description (The best Grunt plugin ever.) 
[?] Version (0.1.0) 
[?] Project git repository (git://github.com/BeBe/grunt-npm-publish.git) git://github.com/Dreamscapes/grunt-npm-publish.git
[?] Project homepage (https://github.com/Dreamscapes/grunt-npm-publish) 
[?] Project issues tracker (https://github.com/Dreamscapes/grunt-npm-publish/issues) 
[?] Licenses (MIT) BSD-3-Clause
[?] Author name (Robert Rossmann) 
[?] Author email (rr.rossmann@me.com) 
[?] Author url (none) https://github.com/Alaneor
[?] What versions of grunt does it require? (~0.4.2) 
[?] What versions of node does it run on? (>= 0.8.0) 
[?] Do you need to make any changes to the above before continuing? (y/N) 

Writing .gitignore...OK
Writing .jshintrc...OK
Writing Gruntfile.js...OK
Writing README.md...OK
Writing tasks/npm_publish.js...OK
Writing test/expected/custom_options...OK
Writing test/expected/default_options...OK
Writing test/fixtures/123...OK
Writing test/fixtures/testing...OK
Writing test/npm_publish_test.js...OK
Fatal error: Arguments to path.join must be strings
TypeError: Arguments to path.join must be strings
    at path.js:360:15
    at Array.filter (native)
    at Object.exports.join (path.js:358:36)
    at Object.file.isPathAbsolute (/usr/lib/node_modules/grunt-init/node_modules/grunt/lib/grunt/file.js:397:28)
    at Object.grunt.util._.extend.copy (/usr/lib/node_modules/grunt-init/tasks/init.js:343:25)
    at /usr/lib/node_modules/grunt-init/tasks/init.js:381:16
    at Array.forEach (native)
    at Object.grunt.util._.extend.copyAndProcess (/usr/lib/node_modules/grunt-init/tasks/init.js:367:28)
    at /Users/BeBe/.grunt-init/gruntplugin/template.js:80:10
    at /usr/lib/node_modules/grunt-init/tasks/lib/prompt.js:124:13

[jchris]

I get this error when I misspell "Apache-2.0" in the setup prompt.

Fatal error: Arguments to path.join must be strings

[robertrossmann]

Just tested this and it really seems to be an issue with the license... If I leave it at default (MIT), the task will complete successfully even if I provide custom URLs.

What's wrong with BSD-3-Clause, though?

[ajmichels]

+1 GPL