npm does not support Node.js v9.0.0

[adrianchia]

ATTN: Go here for a workaround: npm/npm#19019 (comment)

• Version: 9.0.0
• Platform: Windows 10 x64
• Subsystem: npm

After installing Node.js v9.0.0 on Windows 10 x64, npm returns the following message:

npm WARN npm npm does not support Node.js v9.0.0
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8.
npm WARN npm You can find the latest version at https://nodejs.org/
C:\Program Files\nodejs\node.exe: src\node_zlib.cc:430: Assertion `args.Length() == 7 && "init(windowBits, level, memLevel, strategy, writeResult, writeCallback," " dictionary)"' failed.

[lance]

I can confirm similar failure on CentOS.

bash-4.2$ npm install
npm info it worked if it ends with ok
npm WARN npm npm does not support Node.js v9.0.0
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8.
npm WARN npm You can find the latest version at https://nodejs.org/
npm info using npm@5.5.1
npm info using node@v9.0.0
npm info lifecycle node-echo@0.0.1~preinstall: node-echo@0.0.1
npm http fetch GET 200 https://registry.npmjs.org/roi 23ms (from cache)
/usr/local/bin/node[32]: ../src/node_zlib.cc:430:static void node::{anonymous}::ZCtx::Init(const v8::FunctionCallbackInfo<v8::Value>&): Assertion `args.Length() == 7 && "init(windowBits, level, memLevel, strategy, writeResult, writeCallback," " dictionary)"' failed.
 1: node::Abort() [npm]
 2: node::Assert(char const* const (*) [4]) [npm]
 3: 0x1251ea1 [npm]
 4: v8::internal::FunctionCallbackArguments::Call(void (*)(v8::FunctionCallbackInfo<v8::Value> const&)) [npm]
 5: 0xb74c3c [npm]
 6: v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) [npm]
 7: 0x1a5bf6a842fd
Aborted
bash-4.2$ uname -a
Linux afbccd39ba67 4.9.44-linuxkit-aufs #1 SMP Fri Aug 25 10:00:41 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

[ArmaProjects]

Have the same problem on Win 10, x64

npm WARN npm npm does not support Node.js v9.0.0
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8.
npm WARN npm You can find the latest version at https://nodejs.org/
C:\Program Files\nodejs\node.exe: src\node_zlib.cc:430: Assertion `args.Length() == 7 && "init(windowBits, level, memLevel, strategy, writeResult, writeCallback," " dictionary)"' failed.lem

[MylesBorins]

@adrianchia are you using the version of npm that came bundled with node? The current upstream version of npm does not work with Node.js 9.x which is why we floated b8888f5 and 9f33a24

Is it possible you are not using the bundled version of npm?

/cc @nodejs/npm

[bricss]

If you have npm updated from bundled with node, just remove it manually from global packages.

[MylesBorins]

@nodejs/collaborators Do you think it makes sense to keep this open until npm fixes this upstream? If so it may make sense to lock this issue and make a comment in the OP with the solution

[amritk]

failed on Ubuntu 16.10 as well
node: 9.0.0
npm: 5.5.1

npm WARN npm npm does not support Node.js v9.0.0
npm WARN npm You should probably upgrade to a newer version of node as we
npm WARN npm can't make any promises that npm will work with this version.
npm WARN npm Supported releases of Node.js are the latest release of 4, 6, 7, 8.
npm WARN npm You can find the latest version at https://nodejs.org/
/home/amritk/.nvm/versions/node/v9.0.0/bin/node[13315]: ../src/node_zlib.cc:430:static void node::{anonymous}::ZCtx::Init(const v8::FunctionCallbackInfo<v8::Value>&): Assertion `args.Length() == 7 && "init(windowBits, level, memLevel, strategy, writeResult, writeCallback," " dictionary)"' failed.
 1: node::Abort() [npm]
 2: node::Assert(char const* const (*) [4]) [npm]
 3: 0x1251ea1 [npm]
 4: v8::internal::FunctionCallbackArguments::Call(void (*)(v8::FunctionCallbackInfo<v8::Value> const&)) [npm]
 5: 0xb74c3c [npm]
 6: v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) [npm]
 7: 0x3a93576842fd
Aborted (core dumped)

[MongoExpUser]

I am confirming it failed also on Ubuntu 16.04.3 LTS
node: 9.0.0
npm: 5.5.1

[amritk]

There's a workaround posted in npm/npm#19019 (comment) by @addaleax

For now, you should be able to work around this

by using npmc rather than npm, i.e. npx npmc install instead of npm install; or
by using the version of npm that is bundled with Node 9; or
by downgrading to npm@5.3.x: [sudo] npm install -g npm@5.3.x
The “real” fix would be waiting for the next npm release.