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Does the dogma of the Immaculate Conception or any other church teaching state whether Mary ever sinned in her life?

THe Catechism states:

493 The Fathers of the Eastern tradition call the Mother of God "the All-Holy" (panagia) and celebrate her as "free from any stain of sin, as though fashioned be the Holy Spirit and formed as a new creature." By the grace of God Mary remained free of every personal sin her whole life long.

Re the Immaculate Conception (Mary, herself, being conceived, NOT Christ conceived within her):

The Immaculate Conception

490 To become the mother of the Savior, Mary "was enriched by God with gifts appropriate to such a role." The angel Gabriel at the moment of the annunciation salutes her as "full of grace." In fact, in order for Mary to be able to give the free assent of her faith to the announcement of her vocation, it was necessary tthat she be wholly borne by God's grace.

491 Through the centuries the Church has become ever more aware that Mary, "full of grace" through God, was redeemed from the moment of her conception. That is what the dogma of the Immaculate Conception confesses, as Pope Pius IX proclaimed in 1854: "The most Blessed Virgin Mary was, from the first moment of her conception, by a singular grace an privilege of almighty GOd and by virtue of the merits of Jesus Christ, Savior of the Human Race, preserved immune from all stain of original sin."

492 The "splendor of an entirely unique holiness" by which Mary if "enriched from the first instant of her conception" comes wholly from Christ: she is "redeemed in a more exalted fashion, by reason of the merits of her Son." The Father blessed Mary more than any other created person "in Christ with every spiritual blessing in the heavenly places" and chose her "in Christ before the foundation of the world, to be holy and blameless before him in love."