writeUInt16BE: incorrect 'value of "value" is out of range.' error message?

[lautarodragan]

• Version: v10.13.0
• Platform: Linux Mint 4.13.0-43-generic #48~16.04.1-Ubuntu SMP Thu May 17 12:56:46 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
• Subsystem: don't know

From its name and its behavior, I'm think writeUInt16BE can only take up to 2 bytes (0xFFFF, 65535), but it accepts up to 4, although it ignores anything after 2.

In the REPL:

> const o = Buffer.alloc(8)
undefined
> o.writeUInt16BE(0xFFFFFF) // 16777215
2
> o
<Buffer ff ff 00 00 00 00> // 0xFFFF, 65535 got written. Rest got ignored.
> b.writeUInt16BE(0xFFFFFFFF) // 4294967295
2
> b
<Buffer ff ff 00 00 00 00 00 00> // same
> b.writeUInt16BE(0xFFFFFFFFFF)
RangeError [ERR_OUT_OF_RANGE]: The value of "value" is out of range. It must be >= 0 and <= 4294967295. Received 1099511627775
    at checkInt (internal/buffer.js:35:11)
    at writeU_Int16BE (internal/buffer.js:653:3)
    at Buffer.writeUInt16BE (internal/buffer.js:661:10)

The error message matches the behavior, although I'm confused by it. I can't find mention of this in the docs.

writeUInt16LE behaves and reports differently:

> b.writeUInt16LE(0xFFFFFFFF) 
RangeError [ERR_OUT_OF_RANGE]: The value of "value" is out of range. It must be >= 0 and <= 65535. Received 4294967295
    at checkInt (internal/buffer.js:35:11)
    at writeU_Int16LE (internal/buffer.js:543:3)
    at Buffer.writeUInt16LE (internal/buffer.js:551:10)

[Trott]

@nodejs/buffer