[rubygems/rubygems] Fix crash when running `bundle outdated` in debug mode

Previously it would crash like this:

````
$ /Users/deivid/.asdf/installs/ruby/3.1.2/bin/ruby -I/Users/deivid/Code/rubygems/rubygems/bundler/spec -r/Users/deivid/Code/rubygems/rubygems/bundler/spec/support/artifice/fail.rb -r/Users/deivid/Code/rubygems/rubygems/bundler/spec/support/hax.rb /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/bin/bundle outdated --patch --strict --filter-patch
Running `bundle outdated --filter-patch --patch --strict` with bundler 2.4.0.dev
Found changes from the lockfile, re-resolving dependencies because bundler is unlocking Using a local server, bundler won't use the CompactIndex API
Fetching source index from file:///Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/remote4/
Resolving dependencies...
--- ERROR REPORT TEMPLATE -------------------------------------------------------

```
RuntimeError: LazySpecification has not been materialized yet (calling :loaded_from [])
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/lazy_specification.rb:147:in `method_missing'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli/outdated.rb:214:in `gem_column_for'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli/outdated.rb:174:in `block in print_gems_table'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli/outdated.rb:173:in `map'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli/outdated.rb:173:in `print_gems_table'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli/outdated.rb:123:in `run'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli.rb:420:in `outdated'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli.rb:31:in `dispatch'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/cli.rb:25:in `start'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/exe/bundle:48:in `block in <top (required)>'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/lib/bundler/friendly_errors.rb:120:in `with_friendly_errors'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/gems/bundler-2.4.0.dev/exe/bundle:36:in `<top (required)>'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/bin/bundle:25:in `load'
  /Users/deivid/Code/rubygems/rubygems/bundler/tmp/1/gems/system/bin/bundle:25:in `<main>'
```
````

https://github.com/rubygems/rubygems/commit/23c46f3b57

1 files changed, 11 insertions, 2 deletions

diff --git a/lib/bundler/cli/outdated.rb b/lib/bundler/cli/outdated.rb
index d5183b060b..9ce583886e 100644
--- a/lib/bundler/cli/outdated.rb
+++ b/lib/bundler/cli/outdated.rb
@@ -129,6 +129,12 @@ module Bundler
 
     private
 
+    def loaded_from_for(spec)
+      return unless spec.respond_to?(:loaded_from)
+
+      spec.loaded_from
+    end
+
     def groups_text(group_text, groups)
       "#{group_text}#{groups.split(",").size > 1 ? "s" : ""} \"#{groups}\""
     end
@@ -184,7 +190,10 @@ module Bundler
 
     def print_gem(current_spec, active_spec, dependency, groups)
       spec_version = "#{active_spec.version}#{active_spec.git_version}"
-      spec_version += " (from #{active_spec.loaded_from})" if Bundler.ui.debug? && active_spec.loaded_from
+      if Bundler.ui.debug?
+        loaded_from = loaded_from_for(active_spec)
+        spec_version += " (from #{loaded_from})" if loaded_from
+      end
       current_version = "#{current_spec.version}#{current_spec.git_version}"
 
       if dependency && dependency.specific?
@@ -211,7 +220,7 @@ module Bundler
       dependency = dependency.requirement if dependency
 
       ret_val = [active_spec.name, current_version, spec_version, dependency.to_s, groups.to_s]
-      ret_val << active_spec.loaded_from.to_s if Bundler.ui.debug?
+      ret_val << loaded_from_for(active_spec).to_s if Bundler.ui.debug?
       ret_val
     end