From cf28431816435e33e8ef190a17a53295584f2a7c Mon Sep 17 00:00:00 2001
From: Petr Chalupa <chalupapetr@post.cz>
Date: Tue, 6 Nov 2018 08:02:33 +0100
Subject: [PATCH] Defensive 1.9.3 support

---
 Rakefile                                        | 10 +++++++++-
 lib/concurrent.rb                               |  2 --
 lib/concurrent/utility/193.rb                   | 17 -----------------
 .../utility/native_extension_loader.rb          | 10 +++++++++-
 4 files changed, 18 insertions(+), 21 deletions(-)
 delete mode 100644 lib/concurrent/utility/193.rb

diff --git a/Rakefile b/Rakefile
index 51e39f5cf..b6827341d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -2,7 +2,15 @@
 
 require_relative 'lib/concurrent/version'
 require_relative 'lib/concurrent/utility/engine'
-require_relative 'lib/concurrent/utility/193'
+
+if Concurrent.ruby_version :<, 2, 0, 0
+  # @!visibility private
+  module Kernel
+    def __dir__
+      File.dirname __FILE__
+    end
+  end
+end
 
 core_gemspec = Gem::Specification.load File.join(__dir__, 'concurrent-ruby.gemspec')
 ext_gemspec  = Gem::Specification.load File.join(__dir__, 'concurrent-ruby-ext.gemspec')
diff --git a/lib/concurrent.rb b/lib/concurrent.rb
index d26dd8e0e..87de46f1b 100644
--- a/lib/concurrent.rb
+++ b/lib/concurrent.rb
@@ -1,5 +1,3 @@
-require 'concurrent/utility/193'
-
 require 'concurrent/version'
 require 'concurrent/constants'
 require 'concurrent/errors'
diff --git a/lib/concurrent/utility/193.rb b/lib/concurrent/utility/193.rb
deleted file mode 100644
index 319dfc924..000000000
--- a/lib/concurrent/utility/193.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-require_relative 'engine'
-
-if Concurrent.ruby_version :<, 2, 0, 0
-  # @!visibility private
-  module Kernel
-    def __dir__
-      File.dirname __FILE__
-    end
-  end
-
-  # @!visibility private
-  class LoadError < ScriptError
-    def path
-      message.split(' -- ').last
-    end
-  end
-end
diff --git a/lib/concurrent/utility/native_extension_loader.rb b/lib/concurrent/utility/native_extension_loader.rb
index 2a0e9e609..a944bd729 100644
--- a/lib/concurrent/utility/native_extension_loader.rb
+++ b/lib/concurrent/utility/native_extension_loader.rb
@@ -42,6 +42,14 @@ def load_native_extensions
 
       private
 
+      def load_error_path(error)
+        if error.respond_to? :path
+          error.path
+        else
+          error.message.split(' -- ').last
+        end
+      end
+
       def set_c_extensions_loaded
         @c_extensions_loaded = true
       end
@@ -54,7 +62,7 @@ def try_load_c_extension(path)
         require path
         set_c_extensions_loaded
       rescue LoadError => e
-        if e.path == path
+        if load_error_path(e) == path
           # move on with pure-Ruby implementations
           # TODO (pitr-ch 12-Jul-2018): warning on verbose?
         else