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// MIR for `main` after built

| User Type Annotations
| 0: user_ty: Canonical { value: Ty(std::option::Option<u8>), max_universe: U0, variables: [] }, span: $DIR/issue_101867.rs:3:12: 3:22, inferred_ty: std::option::Option<u8>
| 1: user_ty: Canonical { value: Ty(std::option::Option<u8>), max_universe: U0, variables: [] }, span: $DIR/issue_101867.rs:3:12: 3:22, inferred_ty: std::option::Option<u8>
|
fn main() -> () {
    let mut _0: ();                      // return place in scope 0 at $DIR/issue_101867.rs:+0:11: +0:11
    let _1: std::option::Option<u8> as UserTypeProjection { base: UserType(0), projs: [] }; // in scope 0 at $DIR/issue_101867.rs:+1:9: +1:10
    let mut _2: !;                       // in scope 0 at $DIR/issue_101867.rs:+2:26: +4:6
    let _3: ();                          // in scope 0 at $SRC_DIR/std/src/panic.rs:LL:COL
    let mut _4: !;                       // in scope 0 at $SRC_DIR/std/src/panic.rs:LL:COL
    let mut _6: isize;                   // in scope 0 at $DIR/issue_101867.rs:+2:9: +2:16
    scope 1 {
        debug x => _1;                   // in scope 1 at $DIR/issue_101867.rs:+1:9: +1:10
        let _5: u8;                      // in scope 1 at $DIR/issue_101867.rs:+2:14: +2:15
        scope 2 {
            debug y => _5;               // in scope 2 at $DIR/issue_101867.rs:+2:14: +2:15
        }
    }

    bb0: {
        StorageLive(_1);                 // scope 0 at $DIR/issue_101867.rs:+1:9: +1:10
        _1 = Option::<u8>::Some(const 1_u8); // scope 0 at $DIR/issue_101867.rs:+1:25: +1:32
        FakeRead(ForLet(None), _1);      // scope 0 at $DIR/issue_101867.rs:+1:9: +1:10
        AscribeUserType(_1, o, UserTypeProjection { base: UserType(1), projs: [] }); // scope 0 at $DIR/issue_101867.rs:+1:12: +1:22
        StorageLive(_5);                 // scope 1 at $DIR/issue_101867.rs:+2:14: +2:15
        FakeRead(ForMatchedPlace(None), _1); // scope 1 at $DIR/issue_101867.rs:+2:19: +2:20
        _6 = discriminant(_1);           // scope 1 at $DIR/issue_101867.rs:+2:19: +2:20
        switchInt(move _6) -> [1: bb4, otherwise: bb3]; // scope 1 at $DIR/issue_101867.rs:+2:9: +2:16
    }

    bb1: {
        StorageLive(_3);                 // scope 1 at $SRC_DIR/std/src/panic.rs:LL:COL
        StorageLive(_4);                 // scope 1 at $SRC_DIR/std/src/panic.rs:LL:COL
        _4 = begin_panic::<&str>(const "explicit panic") -> bb7; // scope 1 at $SRC_DIR/std/src/panic.rs:LL:COL
                                         // mir::Constant
                                         // + span: $SRC_DIR/std/src/panic.rs:LL:COL
                                         // + literal: Const { ty: fn(&str) -> ! {begin_panic::<&str>}, val: Value(<ZST>) }
                                         // mir::Constant
                                         // + span: $SRC_DIR/std/src/panic.rs:LL:COL
                                         // + literal: Const { ty: &str, val: Value(Slice(..)) }
    }

    bb2: {
        StorageDead(_4);                 // scope 1 at $SRC_DIR/std/src/panic.rs:LL:COL
        StorageDead(_3);                 // scope 1 at $DIR/issue_101867.rs:+3:16: +3:17
        unreachable;                     // scope 1 at $DIR/issue_101867.rs:+2:26: +4:6
    }

    bb3: {
        goto -> bb6;                     // scope 1 at $DIR/issue_101867.rs:+2:19: +2:20
    }

    bb4: {
        falseEdge -> [real: bb5, imaginary: bb3]; // scope 1 at $DIR/issue_101867.rs:+2:9: +2:16
    }

    bb5: {
        _5 = ((_1 as Some).0: u8);       // scope 1 at $DIR/issue_101867.rs:+2:14: +2:15
        _0 = const ();                   // scope 0 at $DIR/issue_101867.rs:+0:11: +5:2
        StorageDead(_5);                 // scope 1 at $DIR/issue_101867.rs:+5:1: +5:2
        StorageDead(_1);                 // scope 0 at $DIR/issue_101867.rs:+5:1: +5:2
        return;                          // scope 0 at $DIR/issue_101867.rs:+5:2: +5:2
    }

    bb6: {
        StorageDead(_5);                 // scope 1 at $DIR/issue_101867.rs:+5:1: +5:2
        goto -> bb1;                     // scope 0 at $DIR/issue_101867.rs:+0:11: +5:2
    }

    bb7 (cleanup): {
        resume;                          // scope 0 at $DIR/issue_101867.rs:+0:1: +5:2
    }
}