Use `[Symbol.hasInstance]()` to return `true` when asking for
`new Duplex() instanceof Writable`.
PR-URL: #8834
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Calvin Metcalf <calvin.metcalf@gmail.com>

Use `[Symbol.hasInstance]()` to return `true` when asking for
`new Duplex() instanceof Writable`.
PR-URL: #8834
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Calvin Metcalf <calvin.metcalf@gmail.com>

Use `[Symbol.hasInstance]()` to return `true` when asking for
`new Duplex() instanceof Writable`.
PR-URL: #8834
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Calvin Metcalf <calvin.metcalf@gmail.com>

* fs:
  - `SyncWriteStream` now inherits from `Stream.Writable`. (Anna
Henningsen) #8830
    - Practically, this means that when stdio is piped to a file,
stdout and stderr will still be `Writable` streams.
  - `fs.existsSync()` has been undeprecated. `fs.exists()` remains
deprecated. (Dan Fabulich) #8364
* http: `http.request()` now accepts a `timeout` option. (Rene Weber)
#8101
* module: The module loader now maintains its own realpath cache. (Anna
Henningsen) #8100
* npm: Upgraded to 3.10.8 (Kat Marchán)
#8706
* stream: `Duplex` streams now show proper `instanceof
Stream.Writable`. (Anna Henningsen)
#8834
* timers: Improved `setTimeout`/`Interval` performance by up to 22%.
(Brian White) #8661
PR-URL: #9034

* fs:
  - `SyncWriteStream` now inherits from `Stream.Writable`. (Anna
Henningsen) #8830
    - Practically, this means that when stdio is piped to a file,
stdout and stderr will still be `Writable` streams.
  - `fs.existsSync()` has been undeprecated. `fs.exists()` remains
deprecated. (Dan Fabulich) #8364
* http: `http.request()` now accepts a `timeout` option. (Rene Weber)
#8101
* module: The module loader now maintains its own realpath cache. (Anna
Henningsen) #8100
* npm: Upgraded to 3.10.8 (Kat Marchán)
#8706
* stream: `Duplex` streams now show proper `instanceof
Stream.Writable`. (Anna Henningsen)
#8834
* timers: Improved `setTimeout`/`Interval` performance by up to 22%.
(Brian White) #8661
PR-URL: #9034

 2a4b068  introduced a regression in where checking
`instanceof` would fail for `Writable` subclasses inside the
subclass constructor, i.e. before `Writable()` was called.
Also, calling `null instanceof Writable` or
`undefined instanceof Writable` would fail due to accessing the
`_writableState` property of the target object.
This fixes these problems.
Ref: nodejs#8834 (comment)

    * fs:
      - `SyncWriteStream` now inherits from `Stream.Writable`. (Anna
    Henningsen) nodejs/node#8830
        - Practically, this means that when stdio is piped to a file,
    stdout and stderr will still be `Writable` streams.
      - `fs.existsSync()` has been undeprecated. `fs.exists()` remains
    deprecated. (Dan Fabulich) nodejs/node#8364
    * http: `http.request()` now accepts a `timeout` option. (Rene Weber)
    nodejs/node#8101
    * module: The module loader now maintains its own realpath cache. (Anna
    Henningsen) nodejs/node#8100
    * npm: Upgraded to 3.10.8 (Kat Marchan)
    nodejs/node#8706
    * stream: `Duplex` streams now show proper `instanceof
    Stream.Writable`. (Anna Henningsen)
    nodejs/node#8834
    * timers: Improved `setTimeout`/`Interval` performance by up to 22%.
    (Brian White) nodejs/node#8661
Signed-off-by: Ilkka Myller <ilkka.myller@nodefield.com>

    * fs:
      - `SyncWriteStream` now inherits from `Stream.Writable`. (Anna
    Henningsen) nodejs/node#8830
        - Practically, this means that when stdio is piped to a file,
    stdout and stderr will still be `Writable` streams.
      - `fs.existsSync()` has been undeprecated. `fs.exists()` remains
    deprecated. (Dan Fabulich) nodejs/node#8364
    * http: `http.request()` now accepts a `timeout` option. (Rene Weber)
    nodejs/node#8101
    * module: The module loader now maintains its own realpath cache. (Anna
    Henningsen) nodejs/node#8100
    * npm: Upgraded to 3.10.8 (Kat Marchan)
    nodejs/node#8706
    * stream: `Duplex` streams now show proper `instanceof
    Stream.Writable`. (Anna Henningsen)
    nodejs/node#8834
    * timers: Improved `setTimeout`/`Interval` performance by up to 22%.
    (Brian White) nodejs/node#8661
Signed-off-by: Ilkka Myller <ilkka.myller@nodefield.com>

 2a4b068  introduced a regression in where checking
`instanceof` would fail for `Writable` subclasses inside the
subclass constructor, i.e. before `Writable()` was called.
Also, calling `null instanceof Writable` or
`undefined instanceof Writable` would fail due to accessing the
`_writableState` property of the target object.
This fixes these problems.
PR-URL: #9088
Ref: #8834 (comment)
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>

 2a4b068  introduced a regression in where checking
`instanceof` would fail for `Writable` subclasses inside the
subclass constructor, i.e. before `Writable()` was called.
Also, calling `null instanceof Writable` or
`undefined instanceof Writable` would fail due to accessing the
`_writableState` property of the target object.
This fixes these problems.
PR-URL: #9088
Ref: #8834 (comment)
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>

 2a4b068  introduced a regression in where checking
`instanceof` would fail for `Writable` subclasses inside the
subclass constructor, i.e. before `Writable()` was called.
Also, calling `null instanceof Writable` or
`undefined instanceof Writable` would fail due to accessing the
`_writableState` property of the target object.
This fixes these problems.
PR-URL: #9088
Ref: #8834 (comment)
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>

 2a4b068  introduced a regression in where checking
`instanceof` would fail for `Writable` subclasses inside the
subclass constructor, i.e. before `Writable()` was called.
Also, calling `null instanceof Writable` or
`undefined instanceof Writable` would fail due to accessing the
`_writableState` property of the target object.
This fixes these problems.
PR-URL: #9088
Ref: #8834 (comment)
Reviewed-By: Ilkka Myller <ilkka.myller@nodefield.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>