Multipart Reader fails when compiled with error: ReferenceError: matchAfterPrefix is not defined

[vinc3m1]

from: #9620 (comment)

While #9620 was fixed for the --no-check case, the compile --unstable case is still broken using the test script linked to in #9620 (comment):

$ deno compile --unstable test.ts
[...]
Emit test
$ ./test
error: ReferenceError: matchAfterPrefix is not defined
    at scanUntilBoundary (file://$deno$/bundle.js:1702:9)
    at PartReader.read (file://$deno$/bundle.js:1737:22)
    at async copyN (file://$deno$/bundle.js:107:24)
    at async MultipartReader.readForm (file://$deno$/bundle.js:1825:27)
    at async file://$deno$/bundle.js:2095:18

But running with --no-check passes now so that's good:

$ deno run --no-check test.ts
entry [ "payload", "CONTENT" ]
formdata {
  file: [Function: file],
  value: [Function: value],
  entries: [GeneratorFunction: entries],
  removeAll: [AsyncFunction: removeAll],
  [Symbol(Symbol.iterator)]: [Function: [Symbol.iterator]]
}

test.ts:

import { MultipartReader } from "https://deno.land/std@0.93.0/mime/multipart.ts";
import { StringReader } from "https://deno.land/std@0.93.0/io/readers.ts";

// carriage returns added for running on POSIX, not needed if on windows
const content = `--------------------------366796e1c748a2fb\r
Content-Disposition: form-data; name="payload"\r
Content-Type: text/plain\r
\r
CONTENT\r
--------------------------366796e1c748a2fb--`

const boundary = "------------------------366796e1c748a2fb";

const stringReader = new StringReader(content);

const multipartReader = new MultipartReader(stringReader, boundary);
const formData = await multipartReader.readForm()
for (const entry of formData.entries()) {
  console.log("entry", entry);
}
console.log("formdata", formData);

[nayeemrmn]

What happens when you run on Deno 1.9.0 and std 0.93.0?

[vinc3m1]

What happens when you run on Deno 1.9.0 and std 0.93.0?

Just tested on deno 1.9.0 (release, aarch64-apple-darwin) and updated the test script to use std 0.93.0, still the same error output when compiled, just different line numbers.

[nayeemrmn]

cc @kdy1. Looks like the matchAfterPrefix() function is wrongly removed from https://deno.land/std@0.93.0/mime/multipart.ts during DCE when bundling the above code.

[kdy1]

I fixed it and published a new version :)

[satyarohith]

This issue no longer exists with 1.9.2.