Deno 1.39.1 still getting stuck with Sharp

[oscarotero]

This issue #21601 is marked as fixed in Deno 1.39.1, but after upgrading Deno and testing again the same code:

import sharp from "npm:[email protected]";

Deno.test("testing", async () => {
  const content = Deno.readFileSync("./img.jpg");
  console.log(1);

  await sharp(content)
    .toBuffer();
  console.log(2);
  
  await sharp(content)
    .toBuffer();
  console.log(3);
});

The second promise is never resolved:

deno test -A testing.ts
running 1 test from ./testing.ts
testing ...
------- output -------
1
2

Version: Deno 1.39.1 (macOS)

[marcatatem]

Confirming Oscar's findings again. Works until Deno 1.38.5 then gets stuck indefinitely.

[bartlomieju]

Thanks, I'll look into that after holiday break.

[ni-max]

I believe this is related to #21406

As I mentioned here you could try just the commit before that.

[oscarotero]

Hi. Congrats for Deno v1.40!
Any plans to fix this issue anytime soon?
I had to pin the Deno version for Lume to 1.38.5 due this bug.

[mmastrac]

@oscarotero This is on our radar right now. No timeline right this moment, but we hope to nail down what's going on here.

[oscarotero]

Thanks @mmastrac for the quick answer.
I hope it is easy to fix.

[marcatatem]

Following up of this; interestingly, with Deno > v1.40, the second promise in @oscarotero initial test gets resolved. If you add a third await sharp(content).toBuffer(); though, the runner hangs and the promise never gets resolved.

To summarize, until v1.38.5, sharp works beautifully. After v1.38.5 and until v1.4.0, two successive calls to toBuffer() hang. After v1.4.0, two successive calls to toBuffer() work, but add a third and we're back to pre-v1.4.0 situation.

[mmastrac]

This should be fixed when we bump deno_core. :)

[oscarotero]

@mmastrac Thanks so much!

[mmastrac]

Confirmed that #23497 fixes this test (and any number of subsequent calls):

import sharp from "npm:[email protected]";

Deno.test("testing", async () => {
  const content = Deno.readFileSync("./img.jpg");
  console.log(1);

  await sharp(content)
    .toBuffer();
  console.log(2);
  
  await sharp(content)
    .toBuffer();
  console.log(3);

  await sharp(content)
    .toBuffer();
  console.log(4);
});

# /tmp/deno test -A /tmp/test.ts 
Check file:///tmp/test.ts
running 1 test from ./tmp/test.ts
testing ...
------- output -------
1
2
3
4
----- output end -----
testing ... ok (27ms)

ok | 1 passed | 0 failed (37ms)