TypeError: Cannot read property 'line' of undefined

[idflood]

When running gulp-sass-lint on my files I get the following error which seems to happen on the last rule. For exemple if I disable the single-line-per-selector rule the error happen on a different rule.

/project_dir/node_modules/sass-lint/lib/rules/single-line-per-selector.js:20
              'line': next.start.line,
                                ^
TypeError: Cannot read property 'line' of undefined
    at /project_dir/node_modules/sass-lint/lib/rules/single-line-per-selector.js:20:33
    at Node.forEach (/project_dir/node_modules/gonzales-pe/lib/node/basic-node.js:1:2053)
    at /project_dir/node_modules/sass-lint/lib/rules/single-line-per-selector.js:13:16
    at RootNode.traverseByType (/project_dir/node_modules/gonzales-pe/lib/node/root-node.js:1:1739)
    ...

# node --version
v0.12.5

# osx 10.10.5

The error is gone if I change the following line: https://github.com/sasstools/sass-lint/blob/develop/lib/rules/single-line-per-selector.js#L16

if (next && next.start) {

For reference here is a minimal file which cause the error: http://cl.ly/code/1b1o1U1y2q2n
And here the sass-lint.yml: http://cl.ly/code/39022c373X3q

[bgriffith]

Have a fix for this so I'll get a hotfix up this evening. Thanks for highlighting @idflood