result.setRepository(resolveResult.getRepository());
            } catch (ArtifactResolutionException e) {
                if (e.getCause() instanceof ArtifactNotFoundException) {
                    missingDescriptor(session, trace, a, (Exception) e.getCause());
                    if ((getPolicy(session, a, request) & ArtifactDescriptorPolicy.IGNORE_MISSING) != 0) {
                        return null;
                    }