Merge rubygems master.

  This is RC version of Rubygems 2.7.0.
  https://github.com/rubygems/rubygems/commit/688fb7e83c13c3fe7c2bb03c49a2db4c82852aee

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60133 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/rubygems/commands/uninstall_command.rb b/lib/rubygems/commands/uninstall_command.rb
index fe97790194..20b3a7a1e4 100644
--- a/lib/rubygems/commands/uninstall_command.rb
+++ b/lib/rubygems/commands/uninstall_command.rb
@@ -30,7 +30,7 @@ class Gem::Commands::UninstallCommand < Gem::Command
       options[:ignore] = value
     end
 
-    add_option('-D', '--[no-]-check-development',
+    add_option('-D', '--[no-]check-development',
                'Check development dependencies while uninstalling',
                '(default: false)') do |value, options|
       options[:check_dev] = value
@@ -143,7 +143,9 @@ that is a dependency of an existing gem.  You can use the
     deplist = Gem::DependencyList.new
 
     get_all_gem_names.uniq.each do |name|
-      Gem::Specification.find_all_by_name(name).each do |spec|
+      gem_specs = Gem::Specification.find_all_by_name(name)
+      say("Gem '#{name}' is not installed") if gem_specs.empty?
+      gem_specs.each do |spec|
         deplist.add spec
       end
     end
@@ -162,4 +164,3 @@ that is a dependency of an existing gem.  You can use the
   end
 
 end
-