Add failing test when "nick" is part of the enum list

  not ok 8 - errors: /name: anyOf failed: Expected string, got null. /name: Not in enum list: supergirl, batboy.
  #   Failed test 'errors: /name: anyOf failed: Expected string, got null. /name: Not in enum list: supergirl, batboy.'
  #   at t/Helper.pm line 24.
  #     Structures begin differing at:
  #          $got->[1] = Does not exist
  #     $expected->[1] = HASH(0x7fda66e80d80)
  # [{"message":"anyOf failed: Expected string, got null.","path":"\/name"}]
  ok 9 - errors: /name: anyOf failed: Expected string, got null. /name: Not in enum list: supergirl, batboy.

lib/JSON/Validator.pm

@@ -451,7 +451,7 @@ sub _validate {
   }
 
   if ($schema->{enum}) {
-    @errors = $self->_validate_type_enum($data, $path, $schema);
+    push @errors, $self->_validate_type_enum($data, $path, $schema);
     $self->_report_errors($path, 'enum', \@errors) if REPORT;
     return @errors if @errors;
   }

t/jv-enum.t

@@ -33,4 +33,28 @@ validate_ok(
   E('/some_prop/0', 'Not in enum list: x, y.')
 );
 
+# This fails, because the "enum" contains the string "nick"!
+validate_ok(
+  {name => undef},
+  {
+    type       => 'object',
+    required   => ['name'],
+    properties => {name => {type => ['string'], enum => [qw(alex nick)]}},
+  },
+  E('/name', 'anyOf failed: Expected string, got null.'),
+  E('/name', 'Not in enum list: supergirl, batboy.'),
+);
+
+# ...while this is ok
+validate_ok(
+  {name => undef},
+  {
+    type       => 'object',
+    required   => ['name'],
+    properties => {name => {type => ['string'], enum => [qw(supergirl batboy)]}},
+  },
+  E('/name', 'anyOf failed: Expected string, got null.'),
+  E('/name', 'Not in enum list: supergirl, batboy.'),
+);
+
 done_testing;