await writer.write(buffer) never resolves on Deno.Command

Hiho. I'm creating a Deno.CommandDeno.Command that writes a buffer to vipsthumbnailvipsthumbnail via stdin (and reads the result via stdout).

It works most of the time, but sometimes gets stuck on await writer.write(source);await writer.write(source);. Source is the result of await Deno.readFile(path)await Deno.readFile(path).

The big problem is that there is no error, the writer.write() promise is just never resolved. So I have no idea how to debug, catch errors or even cancel this after timeout or something.

I can process a couple of files (all with a new Deno.CommandDeno.Command) but then after a few files it gets stuck and the promise never resolves.

Any ideas how to begin solving what the problem is.

    const cmd = new Deno.Command(this.vipspath + this.vipsthumbnail, {
      args: args,
      stdin: "piped",
      stderr: "piped",
      stdout: "piped",
    }).spawn();

    const writer = cmd.stdin.getWriter();
    console.log("START WRITING", typeof source, source.byteLength);
    await writer.write(source); // <--- STUCK HERE MAY NEVER RESOLVE
    console.log("YAY! WE GOT HERE");
    await writer.ready;
    await writer.close();

    const cmd = new Deno.Command(this.vipspath + this.vipsthumbnail, {
      args: args,
      stdin: "piped",
      stderr: "piped",
      stdout: "piped",
    }).spawn();

    const writer = cmd.stdin.getWriter();
    console.log("START WRITING", typeof source, source.byteLength);
    await writer.write(source); // <--- STUCK HERE MAY NEVER RESOLVE
    console.log("YAY! WE GOT HERE");
    await writer.ready;
    await writer.close();

    const cmd = new Deno.Command(this.vipspath + this.vipsthumbnail, {
      args: args,
      stdin: "piped",
      stderr: "piped",
      stdout: "piped",
    }).spawn();

    const writer = cmd.stdin.getWriter();
    console.log("START WRITING", typeof source, source.byteLength);
    await writer.write(source); // <--- STUCK HERE MAY NEVER RESOLVE
    console.log("YAY! WE GOT HERE");
    await writer.ready;
    await writer.close();

    const cmd = new Deno.Command(this.vipspath + this.vipsthumbnail, {
      args: args,
      stdin: "piped",
      stderr: "piped",
      stdout: "piped",
    }).spawn();

    const writer = cmd.stdin.getWriter();
    console.log("START WRITING", typeof source, source.byteLength);
    await writer.write(source); // <--- STUCK HERE MAY NEVER RESOLVE
    console.log("YAY! WE GOT HERE");
    await writer.ready;
    await writer.close();

await writer.write(buffer) never resolves on Deno.Command

await writer.write(buffer) never resolves on Deno.Command

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Deno

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