We set the `kStartedReading` flag from `_read()` for Worker stdio,
and then `ref()` the port.

However, the `.on('end')` handler is also attached when `._read()`
is not called, e.g. when `process.stdin` inside a Worker is prematurely
ended because stdin was not enabled by the parent thread.

In that case, we should not call `.unref()` for stdin if we did not
also call `.ref()` for it before.

Fixes: #28144
PR-URL: #28153
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Notable changes:

* build:
  * Experimental support for building Node.js on MIPS architecture
    is back. #27992
* child_process:
  * The promisified versions of `child_process.exec` and
    `child_process.execFile` now both return a `Promise` which has the
	child instance attached to their `child` property.
	#28325
* deps:
  * Updated libuv to 1.30.0. #28449
    * Support for the Haiku platform has been added.
    * The maximum `UV_THREADPOOL_SIZE` has been increased from 128 to
	  1024.
    * `uv_fs_copyfile()` now works properly when the source and
	  destination files are the same.
* process:
  * A new method, `process.resourceUsage()` was added. It returns
    resource usage for the current process, such as CPU time.
	#28018
* src:
  * Fixed an issue related to stdio that could lead to a crash of the
    process in some circumstances.
	#28490
* stream:
  * Added a `writableFinished` property to writable streams. It
    indicates that all the data has been flushed to the underlying
	system. #28007
* worker:
  * Fixed an issue that prevented worker threads to listen for data on
    stdin. #28153

PR-URL: #28508

Notable changes:

* build:
  * Experimental support for building Node.js on MIPS architecture
    is back. #27992
* child_process:
  * The promisified versions of `child_process.exec` and
    `child_process.execFile` now both return a `Promise` which has the
	child instance attached to their `child` property.
	#28325
* deps:
  * Updated libuv to 1.30.0. #28449
    * Support for the Haiku platform has been added.
    * The maximum `UV_THREADPOOL_SIZE` has been increased from 128 to
	  1024.
    * `uv_fs_copyfile()` now works properly when the source and
	  destination files are the same.
* process:
  * A new method, `process.resourceUsage()` was added. It returns
    resource usage for the current process, such as CPU time.
	#28018
* src:
  * Fixed an issue related to stdio that could lead to a crash of the
    process in some circumstances.
	#28490
* stream:
  * Added a `writableFinished` property to writable streams. It
    indicates that all the data has been flushed to the underlying
	system. #28007
* worker:
  * Fixed an issue that prevented worker threads to listen for data on
    stdin. #28153
* meta:
  * Added Jiawen Geng (https://github.com/gengjiawen) to collaborators.
    #28322

PR-URL: #28508

Notable changes:

* build:
  * Experimental support for building Node.js on MIPS architecture
    is back. #27992
* child_process:
  * The promisified versions of `child_process.exec` and
    `child_process.execFile` now both return a `Promise` which has the
	child instance attached to their `child` property.
	#28325
* deps:
  * Updated libuv to 1.30.1. #28449,
    #28511
    * Support for the Haiku platform has been added.
    * The maximum `UV_THREADPOOL_SIZE` has been increased from 128 to
	  1024.
    * `uv_fs_copyfile()` now works properly when the source and
	  destination files are the same.
* process:
  * A new method, `process.resourceUsage()` was added. It returns
    resource usage for the current process, such as CPU time.
	#28018
* src:
  * Fixed an issue related to stdio that could lead to a crash of the
    process in some circumstances.
	#28490
* stream:
  * Added a `writableFinished` property to writable streams. It
    indicates that all the data has been flushed to the underlying
	system. #28007
* worker:
  * Fixed an issue that prevented worker threads to listen for data on
    stdin. #28153
* meta:
  * Added Jiawen Geng (https://github.com/gengjiawen) to collaborators.
    #28322

PR-URL: #28508

Notable changes:

* build:
  * Experimental support for building Node.js on MIPS architecture
    is back. #27992
* child_process:
  * The promisified versions of `child_process.exec` and
    `child_process.execFile` now both return a `Promise` which has the
	child instance attached to their `child` property.
	#28325
* deps:
  * Updated libuv to 1.30.1. #28449,
    #28511
    * Support for the Haiku platform has been added.
    * The maximum `UV_THREADPOOL_SIZE` has been increased from 128 to
	  1024.
    * `uv_fs_copyfile()` now works properly when the source and
	  destination files are the same.
* process:
  * A new method, `process.resourceUsage()` was added. It returns
    resource usage for the current process, such as CPU time.
	#28018
* src:
  * Fixed an issue related to stdio that could lead to a crash of the
    process in some circumstances.
	#28490
* stream:
  * Added a `writableFinished` property to writable streams. It
    indicates that all the data has been flushed to the underlying
	system. #28007
* worker:
  * Fixed an issue that prevented worker threads to listen for data on
    stdin. #28153
* meta:
  * Added Jiawen Geng (https://github.com/gengjiawen) to collaborators.
    #28322

PR-URL: #28508