IS A TRUE PROPHET OF GOD INFALLIBLE?

It seems to me that the belief that a true prophet of God is infallible is wide-spread among God's people. I held this belief myself for a time. Does Scripture teach this?

First of all, let me make it clear that to say that prophets are fallible is not saying that there is error in the prophecies of Scripture. The Church is not saying that there is error in the prophecies of Scripture. The Church has judged those particular prophecies to be accurate, and time and events have confirmed the accuracy of those whose time has come. However, this does not mean that all prophets are infallible, or that even those whose prophecies are included in the Scriptures were infallible. Does the Bible say that true prophets of God are infallible? Can it be established that the prophets whose words comprise the canon never prophesied something not included in the Scriptures that was inaccurate?

Deut. 18:20-22 and I Sam. 9:6-9 might be used to support a position of the infallibility of true prophet...