问题
I encountered this issue when I run bundle install with Ruby version 2.4.4 and macOS Mojave:
Fetching nokogiri 1.8.5
Installing nokogiri 1.8.5 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
ERROR: cannot discover where libxml2 is located on your system. please
make sure `pkg-config` is installed.
So I ran
xcode-select --install
But then when I run gem install nokogiri I got the following output:
ERROR: While executing gem ... (TypeError)
incompatible marshal file format (can't be read)
format version 4.8 required; 60.33 given
I tried to set my cookies_serializer to :hybrid:
Rails.application.config.action_dispatch.cookies_serializer = :hybrid
But nothing worked.
Is there a way to fix this? I cannot even run my Rails server right now.
回答1:
Thanks to Morgan Jarry answer, this is what worked for me :
I checked my current sources and indeed they were outdated :
gem sources
It printed
*** CURRENT SOURCES ***
http://gems.rubyforge.org/
http://gems.github.com
So I ran this script to remove them and replaced them with https://rubygems.org/
gem sources -r http://gems.rubyforge.org/
gem sources -r http://gems.github.com
gem sources -a https://rubygems.org/
回答2:
Try removing your ~/.gemrc. I had the same problem on Mojave and this solve my problem.
回答3:
You have to remove all the gem sources you have and add https://rubygems.org/ instead. Note that http://gems.rubyforge.org/ and http://gems.github.com are permanently dead and should be removed. You can list your sources by running:
gem sources
You should get something like this:
*** CURRENT SOURCES ***
//gems.rubyforge.org/
//gems.github.com
1) Delete all sources:
gem sources -r http://gems.rubyforge.org/
gem sources -r http://gems.github.com
2) Add the right source:
gem sources -a https://rubygems.org/
Hope this helps!
来源：https://stackoverflow.com/questions/54786580/error-while-executing-gem-typeerror-incompatible-marshal-file-format-can