Skip test_bug_13526 with High Sierra

Author: hsbt

test/ruby/test_autoload.rb

@@ -274,6 +274,11 @@ def test_autoload_while_autoloading
   end
 
   def test_bug_13526
+    # Skip this on macOS 10.13 because of the following error:
+    # http://rubyci.s3.amazonaws.com/osx1013/ruby-master/log/20231011T014505Z.fail.html.gz
+    require "rbconfig"
+    omit if RbConfig::CONFIG["target_os"] == "darwin17"
+
     script = File.join(__dir__, 'bug-13526.rb')
     assert_ruby_status([script], '', '[ruby-core:81016] [Bug #13526]')
   end