OSX Homebrew error: uninitialized constant MACOS

Question

I\'ve searched around a bit and can\'t seem to find any record of anyone else with this problem.

Whenever I try to run

$ brew update

Answer 1

I had a similar issue, when I Killed an install mid-way with Ctrl-D. Post that whenever I tried installing anything it gave the following error

uninitialized constant Homebrew::CLI::Parser::ARGV_WITHOUT_MONKEY_PATCHING

As a fix, I went to the directory I had where homebrew was installed, and reset the HEAD.

cd /usr/local/Homebrew
git status 
git checkout .

And then it started working magically.