Grunt compass:dist任务失败,原因是bootstrap sass official/assets/stylesheets/bootstrap/_variables.CSS中的CSS无效

咕哝的体格 由于产生以下错误而失败:

错误app/styles/directive.scs(第369行,共369行 bower_components/bootstrap-sass official/assets/stylesheets/bootstrap/_variables.css: “…floor(math”:expected“)”后的CSS无效,为 “.div($grid gutt…”)

Gruntfile.js 有 compass 和 build 任务如下:

grunt.initConfig({

        ....
        
        compass: {
            options: {
                sassDir: '<%= yeoman.app %>/styles',
                cssDir: '.tmp/styles',
                generatedImagesDir: '.tmp/images/generated',
                imagesDir: '<%= yeoman.app %>/images',
                javascriptsDir: '<%= yeoman.app %>/scripts',
                fontsDir: '<%= yeoman.app %>/styles/fonts',
                importPath: './bower_components',
                httpImagesPath: '/images',
                httpGeneratedImagesPath: '/images/generated',
                httpFontsPath: '/styles/fonts',
                relativeAssets: false,
                assetCacheBuster: false,
                raw: 'Sass::Script::Number.precision = 10\n'
            },
            dist: {
                options: {
                    generatedImagesDir: '<%= yeoman.dist %>/images/generated'
                }
            },
            server: {
                options: {
                    sourcemap: true
                }
            }
        },
        
        concurrent: {
            server: [
                'compass:server'
            ],
            test: [
                'compass'
            ],
            dist: [
                'compass:dist',
                'imagemin',
                'svgmin'
            ]
        },
        ....
    });

grunt.registerTask('build', [
        'concurrent:dist',
    ]);

package.json 包括:

"grunt-contrib-compass": "^1.0.0",

bower.json 包括:

"bootstrap-sass-official": "^3.2.0",

其他信息:

操作系统:Linux Ubuntu 18.10

节点:v8.17.0

NPM:v6.13.4

Ruby:Ruby 2.5.1p57(2018-03-29修订版63029)[x86_64-linux-gnu]

指南针:指南针1.0.3(北极星)