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Token count and size limits exist to guard against excessive heap usage. We check them only after we created the token on the heap. That's assigning a cowboy to the barn to lasso the horse after it has bolted. Close the barn door instead: check before we create the token. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180823164025.12553-49-armbru@redhat.com>