Protect mkspec against accessing SortedSet without the gem

Author: trinistr

lib/mspec/utils/name_map.rb

@@ -67,9 +67,13 @@ def exception?(name)
 
   def class_or_module(c)
     const = Object.const_get(c, false)
+    return nil unless Module === const
+
     filtered = @filter && EXCLUDED.include?(const.name)
-    return const if Module === const and !filtered
-  rescue NameError
+    return const unless filtered
+  rescue NameError, RuntimeError
+    # Either the constant doesn't exist or it is
+    # explicitly raising an error, like `SortedSet`.
   end
 
   def namespace(mod, const)

spec/utils/fixtures/this_file_raises.rb

@@ -0,0 +1 @@
+raise "This is a BAD file"

spec/utils/name_map_spec.rb

@@ -21,6 +21,8 @@ class Fixnum
     def f; end
   end
 
+  autoload :BadFile, "#{__dir__}/fixtures/this_file_raises.rb"
+
   def self.n; end
   def n; end
 end
@@ -84,6 +86,10 @@ def n; end
     expect(@map.class_or_module("Hell")).to eq(nil)
     expect(@map.class_or_module("Bush::Brain")).to eq(nil)
   end
+
+  it "returns nil if accessing the constant raises RuntimeError" do
+    expect(@map.class_or_module("NameMapSpecs::BadFile")).to eq(nil)
+  end
 end
 
 RSpec.describe NameMap, "#dir_name" do