Sass. How to catch syntax. mistake?

Question

Sass

Hello!
I 'm using bootstrap.scss
Everything worked fine until I opened one of the _buttons.scss files. In it, all variables are highlighted with errors.
And the main file in which bootstrap is imported is no longer collected.
Writes:

main.scss compilation failed: The service failed to respond to this request
Possible cause: Syntax Error!

but before he was going to do the same? Writes a syntax error. How to catch her? I tried to replace the files from the bootstrap off site - it did not help.

Answer 1

There were no errors in the code. The problem was solved by restarting Visual Studio.

Answer 2

for gulp-sass .pipe(sass().on('error', sass.logError))
or you can use other error handling packages like gulp-plumber