【bug】'use strict' is double emitted

[redhat]

output

"use strict";'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

// src/util.ts
function fun1(boy) {
  console.log("fun1", boy);
}
function fun2() {
  console.log("fun2");
}

exports.fun1 = fun1;
exports.fun2 = fun2;

tsup config

{
  entry: ['src/pages/**/*.ts'],
  splitting: true,
  sourcemap: false,
  clean: true,
  dts: true,
  treeshake: true,
  esbuildOptions(options) {
    options.outbase = 'src'
    options.chunkNames = '[hash]'
  }
}