test/jdk/java/lang/runtime/ObjectMethodsTest.java

@@ -150,10 +150,17 @@
  
          assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "toString", C.EQUALS_DESC,    C.class, "x;y", C.ACCESSORS));
          assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "hashCode", C.TO_STRING_DESC, C.class, "x;y", C.ACCESSORS));
          assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "equals",   C.HASHCODE_DESC,  C.class, "x;y", C.ACCESSORS));
  
+         assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "toString", methodType(String.class, this.getClass()), C.class, "x;y", C.ACCESSORS));
+         assertThrows(IAE, () -> ObjectMethods.bootstrap(LOOKUP, "toString", C.TO_STRING_DESC, C.class, "x;y",
+                      new MethodHandle[]{
+                             MethodHandles.lookup().findGetter(C.class, "x", int.class),
+                             MethodHandles.lookup().findGetter(this.getClass(), "y", int.class),
+                      }));
+ 
          record NamePlusType(String mn, MethodType mt) {}
          List<NamePlusType> namePlusTypeList = List.of(
                  new NamePlusType("toString", C.TO_STRING_DESC),
                  new NamePlusType("equals", C.EQUALS_DESC),
                  new NamePlusType("hashCode", C.HASHCODE_DESC)

@@ -168,10 +175,13 @@
              assertThrows(NPE, () -> ObjectMethods.bootstrap(LOOKUP, null,     npt.mt(), C.class, "x;y", C.ACCESSORS));
              assertThrows(NPE, () -> ObjectMethods.bootstrap(null, npt.mn(),     npt.mt(), C.class, "x;y", C.ACCESSORS));
          }
      }
  
+     // same field name and type as C::y
+     private int y;
+ 
      // Based on the ObjectMethods internal implementation
      private static int hashCombiner(int x, int y) {
          return x*31 + y;
      }
  }