[Flight] Fix debug channel flag in Node.js server renderToPipeableStream (#35724)

## Summary - Fixes the `createRequest` call in `renderToPipeableStream` to pass `debugChannelReadable !== undefined` instead of `debugChannel !== undefined` in the turbopack, esm, and parcel Node.js server implementations - The webpack version already had the correct check; this brings the other bundler implementations in line The bug was introduced in #33754. With `debugChannel !== undefined`, the server could signal that debug info should be emitted even when only a write-only debug channel is provided (no readable side), potentially causing the client to block forever waiting for debug data that never arrives.

Jimmy Lai committed Feb 8, 2026 at 11:14 UTC 2dd9b7cf76c31df5d7e26e5199e3c362c3e94f95

3 files changed +3 -3

packages/react-server-dom-esm/src/server/ReactFlightDOMServerNode.js

+1 -1

@@ -187,7 +187,7 @@ function renderToPipeableStream(

187 options ? options.startTime : undefined,

188 __DEV__ && options ? options.environmentName : undefined,

189 __DEV__ && options ? options.filterStackFrame : undefined,

190 - debugChannel !== undefined,

190 + debugChannelReadable !== undefined,

191 );

192 let hasStartedFlowing = false;

193 startWork(request);

packages/react-server-dom-parcel/src/server/ReactFlightDOMServerNode.js

+1 -1

@@ -199,7 +199,7 @@ export function renderToPipeableStream(

199 options ? options.startTime : undefined,

200 __DEV__ && options ? options.environmentName : undefined,

201 __DEV__ && options ? options.filterStackFrame : undefined,

202 - debugChannel !== undefined,

202 + debugChannelReadable !== undefined,

203 );

204 let hasStartedFlowing = false;

205 startWork(request);

packages/react-server-dom-turbopack/src/server/ReactFlightDOMServerNode.js

+1 -1

@@ -193,7 +193,7 @@ function renderToPipeableStream(

193 options ? options.startTime : undefined,

194 __DEV__ && options ? options.environmentName : undefined,

195 __DEV__ && options ? options.filterStackFrame : undefined,

196 - debugChannel !== undefined,

196 + debugChannelReadable !== undefined,

197 );

198 let hasStartedFlowing = false;

199 startWork(request);