Contradiction with Matthew 7:11
While Luke 11:12 speaks about a father not giving a scorpion instead of an egg, Matthew 7:11 emphasizes that parents give good gifts to their children, stressing God's willingness to give good gifts without the analogy of a scorpion or an egg.
Matthew 7:11: If ye then, being evil, know how to give good gifts unto your children, how much more shall your Father which is in heaven give good things to them that ask him?
Contradiction with James 1:13
Luke 11:12 uses the metaphor of giving inappropriate things (a scorpion) to illustrate what God wouldn't do, whereas James 1:13 explicitly states that God cannot be tempted with evil and does not tempt anyone, contradicting the idea of a negative outcome.
James 1:13: Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man: [evil: or, evils]