Homebrew cannot install latest version of yarn

[AlvinYuXT]

Do you want to request a feature or report a bug?

It's a bug.

What is the current behavior?
The stable version of yarn is 1.12.3 now, but When I run brew info yarn I got this:

yarn: stable 1.9.4
JavaScript package manager
https://yarnpkg.com/
Conflicts with:
hadoop (because both install yarn binaries)
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/yarn.rb
==> Dependencies
Recommended: node ✘
==> Options
--without-node
Build without node support
==> Analytics
install: 147,652 (30 days), 363,206 (90 days), 1,198,647 (365 days)
install_on_request: 145,936 (30 days), 359,008 (90 days), 1,180,163 (365 days)
build_error: 0 (30 days)

And when I open the this link https://github.com/Homebrew/homebrew-core/blob/master/Formula/yarn.rb I found this:

url "https://yarnpkg.com/downloads/1.12.3/yarn-v1.12.3.tar.gz"

What is the expected behavior?
Install the latest version of yarn

Please mention your node.js, yarn and operating system version.
node v10.13.0
macOS High Sierra 10.13.6

[rally25rs]

duplicate of #2337
As stated in the Brew output, Hadoop also has a yarn binary that they install, so there is a conflict and it halts the install so that your hadoop yarn binary is not overwritten.

[AlvinYuXT]

@rally25rs There is no Hadoop in my Mac. When I run brew install yarn the version I installed is 1.9.4 which the latest version is 1.12.3.

[cakasuma]

im also having the same issue

[AlvinYuXT]

@cakasuma I fix this problem by installing yarn by npm