Ensure crr->feature is an fstring

Author: jhawthorn

ractor.c

@@ -2339,8 +2339,8 @@ rb_ractor_require(VALUE feature)
     VALUE crr_obj = TypedData_Make_Struct(0, struct cross_ractor_require, &cross_ractor_require_data_type, crr);
     FL_SET_RAW(crr_obj, RUBY_FL_SHAREABLE);
 
-    // TODO: make feature shareable
-    crr->feature = feature;
+    // Convert feature to proper file path and make it shareable as fstring
+    crr->feature = rb_fstring(FilePathValue(feature));
     crr->port = ractor_port_new(GET_RACTOR());
     crr->result = Qundef;
     crr->exception = Qundef;

test/ruby/test_ractor.rb

@@ -118,6 +118,21 @@ def test_require_raises_and_no_ractor_belonging_issue
     RUBY
   end
 
+  def test_require_non_string
+    assert_ractor(<<~'RUBY')
+      require "tempfile"
+      require "pathname"
+      f = Tempfile.new(["file_to_require_from_ractor", ".rb"])
+      f.write("puts 'success'")
+      f.flush
+      result = Ractor.new(f.path) do |path|
+        require Pathname.new(path)
+        "success"
+      end.value
+      assert_equal "success", result
+    RUBY
+  end
+
   def assert_make_shareable(obj)
     refute Ractor.shareable?(obj), "object was already shareable"
     Ractor.make_shareable(obj)