/sass/spec/libsass-issues/issue_1331/input.scss:3 DEBUG: (foo: 1px, null: 2px, false: 3px, true: 4px)
/sass/spec/libsass-issues/issue_1331/input.scss:4 DEBUG: 1px
/sass/spec/libsass-issues/issue_1331/input.scss:5 DEBUG: 2px
/sass/spec/libsass-issues/issue_1331/input.scss:6 DEBUG: 3px
/sass/spec/libsass-issues/issue_1331/input.scss:7 DEBUG: 4px
