gRPC client failing because of stream premature close error.

[pablojimpas]

What version of Bun is running?

1.1.29+6d43b3662

What platform is your computer?

Linux 6.10.10-artix1-1 x86_64 unknown

What steps can reproduce the bug?

1. Clone the demo repo git clone https://github.com/pablojimpas/demo-bug-grpc.
2. Install dependencies: bun install.
3. Generate Protocol Buffers code: bun run generate.
4. Run the program bun run index.ts

What is the expected behavior?

The gRPC calls succeeds and the response message appears in the terminal. This works with Node (I'm testing with Node v18.20.4).

I've included two scripts in the package.json to help debugging this: bun run build-bun and bun run build-node to generate bundles for Bun and Node targets.

Running node bundle-node.js and node bundle-bun.js works, but Bun fails with both bun bundle-node.js and bun bundle-bun.js.

What do you see instead?

An error occurs related to a premature close of a stream (ERR_STREAM_PREMATURE_CLOSE):

15947 |   return message.length ? `[${codeToString(code)}] ${message}` : `[${codeToString(code)}]`;
15948 | }
15949 |
15950 | class ConnectError extends Error {
15951 |   constructor(message, code = Code.Unknown, metadata, outgoingDetails, cause) {
15952 |     super(createMessage(message, code));
            ^
ConnectError: [unknown] Premature close
 code: "2"

      at new ConnectError (/home/pablo/demo-grpc/bundle-node.js:15952:5)
      at from (/home/pablo/demo-grpc/bundle-node.js:15969:14)
      at abort (/home/pablo/demo-grpc/bundle-node.js:19624:30)

430 |     }
431 |     function E(code, message, Base) {
432 |       if (!Base)
433 |         Base = Error;
434 |
435 |         constructor(...args) {
                         ^
error: Premature close
 code: "ERR_STREAM_PREMATURE_CLOSE"

      at new NodeError (node:stream:435:20)
      at node:stream:1014:23

Additional information

This might be an issue related to HTTP2, but I don't know the details of the implementation, notice that I'm using @connectrpc/connect instead of @grpc/grpc-js for the gRPC client.