Add location to result from macro method interpretation

spec/compiler/macro/macro_methods_spec.cr

@@ -762,6 +762,10 @@ module Crystal
         assert_macro %({{[1, 2, 3].map { |e| e == 2 }}}), "[false, true, false]"
       end
 
+      it "executes map assigns location" do
+        assert_macro %({{[1].map { |e| e }.filename }}), %("")
+      end
+
       it "executes reduce with no initial value" do
         assert_macro %({{[1, 2, 3].reduce { |acc, val| acc * val }}}), "6"
       end

src/compiler/crystal/macros/interpreter.cr

@@ -367,7 +367,7 @@ module Crystal
         block = node.block.try { |b| @program.normalize(b) }
 
         begin
-          @last = receiver.interpret(node.name, args, named_args, block, self, node.name_location)
+          result = receiver.interpret(node.name, args, named_args, block, self, node.name_location)
         rescue ex : MacroRaiseException
           # Re-raise to avoid the logic in the other rescue blocks and to retain the original location
           raise ex
@@ -376,6 +376,8 @@ module Crystal
         rescue ex
           node.raise ex.message
         end
+        result.location ||= node.name_location
+        @last = result
       else
         # no receiver: special calls
         # may raise `Crystal::TopLevelMacroRaiseException`