Return nil if no source is found

spec/ruby/core/exception/syntax_error_spec.rb

@@ -3,14 +3,24 @@
 
 ruby_version_is "3.2" do
   describe "SyntaxError#path" do
+    it "returns the file path provided to eval" do
+      expected = 'speccing.rb'
+      -> {
+        eval('if true', TOPLEVEL_BINDING, expected)
+      }.should raise_error(SyntaxError) { |e|
+        e.path.should == expected
+      }
+    end
+
     it "returns the file path that raised an exception" do
-      expected_path = File.expand_path(
-        "fixtures/syntax_error.rb",
-        File.dirname(__FILE__)
-      ).to_s
+      expected_path = fixture(__FILE__, 'syntax_error.rb')
       -> {
         require_relative 'fixtures/syntax_error'
       }.should raise_error(SyntaxError) {|e| e.path.should == expected_path }
     end
+
+    it "returns nil when constructed directly" do
+      SyntaxError.new.path.should == nil
+    end
   end
 end

spec/ruby/core/kernel/eval_spec.rb

@@ -141,17 +141,6 @@
     }
   end
 
-  ruby_version_is "3.2" do
-    it "includes path in syntax error" do
-      expected = 'speccing.rb'
-      -> {
-        eval('if true', TOPLEVEL_BINDING, expected)
-      }.should raise_error(SyntaxError) { |e|
-        e.path.should == expected
-      }
-    end
-  end
-
   it "evaluates string with given filename and negative linenumber" do
     expected_file = 'speccing.rb'
     -> {

src/main/java/org/truffleruby/core/exception/SyntaxErrorNodes.java

@@ -25,6 +25,8 @@
 import com.oracle.truffle.api.object.Shape;
 import com.oracle.truffle.api.source.Source;
 
+import static org.truffleruby.language.RubyBaseNode.nil;
+
 @CoreModule(value = "SyntaxError", isClass = true)
 public abstract class SyntaxErrorNodes {
 
@@ -46,9 +48,9 @@ public abstract static class PathNode extends CoreMethodArrayArgumentsNode {
 
         @TruffleBoundary
         @Specialization
-        RubyString path(RubySyntaxError syntaxError) {
+        Object path(RubySyntaxError syntaxError) {
             if (!syntaxError.hasSourceLocation()) {
-                return coreStrings().UNKNOWN.createInstance(getContext());
+                return nil;
             }
 
             Source source;