Declaring logError as function instead of arrow function.

Author: Daniel Kvistgaard

index.js

@@ -150,7 +150,7 @@ gulpSass.sync = options => gulpSass(options, true);
 //////////////////////////////
 // Log errors nicely
 //////////////////////////////
-gulpSass.logError = (error) => {
+gulpSass.logError = function logError(error) {
   const message = new PluginError('sass', error.messageFormatted).toString();
   process.stderr.write(`${message}\n`);
   this.emit('end');

test/main.js

@@ -140,6 +140,15 @@ describe('gulp-sass -- async compile', () => {
     stream.write(sassFile);
   });
 
+  it('should emit logError on sass error', (done) => {
+    const errorFile = createVinyl('error.scss');
+    const stream = sass();
+
+    stream.on('error', sass.logError);
+    stream.on('end', done);
+    stream.write(errorFile);
+  });
+
   it('should handle sass errors', (done) => {
     const errorFile = createVinyl('error.scss');
     const stream = sass();
@@ -397,6 +406,15 @@ describe('gulp-sass -- sync compile', () => {
     stream.write(errorFile);
   });
 
+  it('should emit logError on sass error', (done) => {
+    const errorFile = createVinyl('error.scss');
+    const stream = sass.sync();
+
+    stream.on('error', sass.logError);
+    stream.on('end', done);
+    stream.write(errorFile);
+  });
+
   it('should work with gulp-sourcemaps', (done) => {
     const sassFile = createVinyl('inheritance.scss');