Duplicated identifier with external modules

[ArrayZoneYour]

Input:

index.ts

export { default as A } from './A'
export { default as B } from './B'

A.tsx

import React from 'external'
export default () => {
  return <></>
}

B.tsx

import React from 'external'
export default () => {
  return <></>
}

Build Script
build.js

const esbuild = require('esbuild')
esbuild.build({
  entryPoints: ['./index.ts'],
  bundle: true,
  external: ['external'],
  outfile: 'out.js',
})

out.js

// ...
  // A.tsx
  const external = __toModule(require("external"));
  var A_default = () => {
    return /* @__PURE__ */ external.default.createElement(external.default.Fragment, null);
  };

  // B.tsx
  const external2 = __toModule(require("external"));   // duplicated require !
  var B_default = () => {
    return /* @__PURE__ */ external2.default.createElement(external2.default.Fragment, null);
  };
// ...

Related: #405

[evanw]

Thanks for reporting this. Closing as a duplicate of #475.