Issue with sourcemaps (later transformations)

Please refer to https://github.com/floridoo/gulp-sourcemaps/issues/124.

I am experiencing exactly the same problem using the following Gulp task (ES2015):

gulp.task("build-css", () => {
    return gulp.src(cssSrc)
        .pipe(newer({
            dest: cssDest,
            ext: ".css"
        }))
        .pipe(sourcemaps.init({debug: true}))
        .pipe(sass({
            // See: https://github.com/sass/node-sass/issues/957
            //outputStyle: "compressed"
            outputStyle: "expanded"
        }).on("error", sass.logError))
        .pipe(autoprefixer({
            // Default for Browserslist (https://github.com/ai/browserslist) @ 2015/09/18
            browsers: ["> 1%", "last 2 versions", "Firefox ESR"]
        }))
        .pipe(sourcemaps.write(".", {debug: true}))
        .pipe(gulp.dest(cssDest));
});

Could it be the same thing described in this comment?

Versions:

• OS: Windows 7 (x64)
• Node: 4.1.1
• NPM: 3.3.4
• gulp-sourcemaps@1.6.0
• gulp-sass@2.1.0-beta
• gulp-autoprefixer@3.0.2

[glen-84]

@xzyfer I don’t understand. I took the time to create a very simple repo that clearly shows the issue (see this comment).

@clee704 and @backflip have also supplied test cases, and @backflip has even specified what breaks and in which versions it breaks.

What else could you need? 😕

[xzyfer]

Unfortunately no one has submitted a test case showing exactly what sass is required to break source maps. We know there are issue but source maps complicated and with very specific test cases there isn’t much we can do. On 11 Dec 2015 9:10 pm, “Glen” [e-mail] wrote:

@xzyfer https://github.com/xzyfer Now that LibSass 3.3.0 has shipped, when do you think that you might have time to look into this?

— Reply to this email directly or view it on GitHub https://github.com/dlmanning/gulp-sass/issues/354#issuecomment-163898753 .