1 files changed, 21 insertions, 0 deletions
diff --git a/lib/rubygems/core_ext/kernel_warn.rb b/lib/rubygems/core_ext/kernel_warn.rb
new file mode 100755
index 0000000000..a06ccd39af
--- /dev/null
+++ b/lib/rubygems/core_ext/kernel_warn.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+if RUBY_VERSION >= "2.5"
+  module Kernel
+    path = "#{__dir__}/"
+    original_warn = instance_method(:warn)
+    Module.new {define_method(:warn, original_warn)}
+    original_warn = method(:warn)
+
+    module_function define_method(:warn) {|message, uplevel: nil|
+      if uplevel
+        while (loc, = caller_locations(uplevel, 1); loc && loc.path.start_with?(path))
+          uplevel += 1
+        end
+        original_warn.call(message, uplevel: uplevel + 1)
+      else
+        original_warn.call(message)
+      end
+    }
+  end
+end