The following excerpt is from United States v. Goodall, 18-10004 (9th Cir. 2021):
[5] Two other circuits have agreed to the general principle that a defendant cannot raise a constitutional challenge to a conviction if he waived his right to appeal or collaterally attack it. United States v. Barnes, 953 F.3d 383 (5th Cir. 2020), cert. denied, 141 S.Ct. 438 (2020); United States v. Lloyd, 901 F.3d 111 (2d Cir. 2018).
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