Error: You may not @extend an outer selector from within @media.
       You may only @extend selectors within the same directive.
       From "@extend .foo" on line 7 of /sass/spec/libsass-issues/issue_712/input.scss.
        on line 1 of /sass/spec/libsass-issues/issue_712/input.scss
  Use --trace for backtrace.
