- 執(zhí)行命令失敗
Version value must be a string; got a NilClass
Traceback(most recent call last):
11: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `'
10: from /usr/local/Homebrew/Library/Homebrew/brew.rb:23:in `require_relative'
9: from /usr/local/Homebrew/Library/Homebrew/global.rb:29:in `'
8: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
7: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
6: from /usr/local/Homebrew/Library/Homebrew/os.rb:3:in `'
5: from /usr/local/Homebrew/Library/Homebrew/os.rb:21:in `'
4: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:58:in `prerelease?'
3: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `version'
2: from /usr/local/Homebrew/Library/Homebrew/os/mac.rb:24:in `new'
1: from /usr/local/Homebrew/Library/Homebrew/os/mac/version.rb:26:in `initialize'
/usr/local/Homebrew/Library/Homebrew/version.rb:368:in `initialize':Version value must be a string; got a NilClass () (TypeError)
解決方法：
brew update-reset
