NPE in Predicate.resolve(exchange) when invoked several times

I have few PathPrefixPredicate instantiated with PredicateParser.parse

I use them to check if a request should be allowed (predicate as security permissions) in following code

public boolean isAllowed(HttpServerExchange exchange))

{ ..... return roles(exchange).anyMatch(role -> aclForRole(role).stream().anyMatch(p -> p.resolve(exchange))); }

The first p.resolve invocation goes as expected. The second throws a NPE:

java.lang.NullPointerException: null at io.undertow.predicate.PathPrefixPredicate.resolve(PathPrefixPredicate.java:55)

the fact is that Map<String, Object> context = value.getAttachment(PREDICATE_CONTEXT); return null so the NPE.

if I invoke the following method before iterating through the predicates, it goes fine:

private void fixExchangeForUndertowBug(HttpServerExchange exchange)

{ if (exchange.getAttachment(Predicate.PREDICATE_CONTEXT) == null) exchange.putAttachment(Predicate.PREDICATE_CONTEXT, new HashMap<String, Object>()); }

The code was working with undertow-core 1.0