What is it that causes the html file to be cropped after the gulp-useref call?

1. In the process of using gulp-useref, the file merging was successful, but why the html file I generated was cut

 return gulp.src("./bulid/result-1.html")
                .pipe($.debug())
               .pipe($.useref({},lazypipe().pipe($.sourcemaps.init)))
               .pipe($.if("*.js",$.uglify()))
               .pipe($.if("*.css",$.cleanCss()))
               .pipe($.sourcemaps.write("/maps"))
               .pipe(gulp.dest(dist))
    }

this is a task I wrote myself to merge compressed files.

 <!-- build:js js/result.min.js -->
        <script src="js/result.js"></script>
        <!-- endbulid -->

this is the merged js

  <!-- build:css css/result.min.css -->        
    <link rel="stylesheet" type="text/css" href="css/result-1.css">
    <!-- endbulid -->

this is the merged css

css compressed files and js compressed files can be generated normally. But the generated html file was cut. Why?

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
    <script src="js/flex.js">
    </script>
    <title></title>
    <link rel="stylesheet" href="css/result.min.css">
        <script src="js/result.min.js"></script>

it is found that the rest of the content is gone. Only the compressed file path is left, and even the body and html tags at the end have disappeared