1) RbConfig::CONFIG libdir/LIBRUBY_SO is the path to libruby and it exists if and only if ENABLE_SHARED FAILED Expected File.exist? "d:/Ruby26-x64/lib/x64-msvcrt-ruby260.dll" to be truthy but was false D:/a/ruby/ruby/src/spec/ruby/library/rbconfig/rbconfig_spec.rb:46:in `block (3 levels) in <top (required)>' D:/a/ruby/ruby/src/spec/ruby/library/rbconfig/rbconfig_spec.rb:4:in `<top (required)>'
spec/ruby/library/rbconfig/rbconfig_spec.rb: restore "not windows" guard
https://github.com/ruby/ruby/runs/541455267