src/java.base/share/classes/java/lang/reflect/Constructor.java

*** 122,10 ***
--- 122,11 ---
                  int modifiers,
                  int slot,
                  String signature,
                  byte[] annotations,
                  byte[] parameterAnnotations) {
+         assert declaringClass.isPrimaryType();
          this.clazz = declaringClass;
          this.parameterTypes = parameterTypes;
          this.exceptionTypes = checkedExceptions;
          this.modifiers = modifiers;
          this.slot = slot;

*** 360,17 ***
                                exceptionTypes);
      }
  
      @Override
      void specificToStringHeader(StringBuilder sb) {
!         sb.append(getDeclaringClass().getTypeName());
      }
  
      @Override
      String toShortString() {
          StringBuilder sb = new StringBuilder("constructor ");
!         sb.append(getDeclaringClass().getTypeName());
          sb.append('(');
          StringJoiner sj = new StringJoiner(",");
          for (Class<?> parameterType : getSharedParameterTypes()) {
              sj.add(parameterType.getTypeName());
          }
--- 361,17 ---
                                exceptionTypes);
      }
  
      @Override
      void specificToStringHeader(StringBuilder sb) {
!         sb.append(getDeclaringClassTypeName());
      }
  
      @Override
      String toShortString() {
          StringBuilder sb = new StringBuilder("constructor ");
!         sb.append(getDeclaringClassTypeName());
          sb.append('(');
          StringJoiner sj = new StringJoiner(",");
          for (Class<?> parameterType : getSharedParameterTypes()) {
              sj.add(parameterType.getTypeName());
          }