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// MIR for `old` after PreCodegen

fn old(_1: Result<T, E>) -> Result<T, E> {
    debug x => _1;                       // in scope 0 at $DIR/try_identity_e2e.rs:+0:14: +0:15
    let mut _0: std::result::Result<T, E>; // return place in scope 0 at $DIR/try_identity_e2e.rs:+0:34: +0:46
    let mut _2: T;                       // in scope 0 at $DIR/try_identity_e2e.rs:+2:9: +5:10
    let mut _3: isize;                   // in scope 0 at $DIR/try_identity_e2e.rs:+3:13: +3:18
    let _4: T;                           // in scope 0 at $DIR/try_identity_e2e.rs:+3:16: +3:17
    let _5: E;                           // in scope 0 at $DIR/try_identity_e2e.rs:+4:17: +4:18
    let mut _6: E;                       // in scope 0 at $DIR/try_identity_e2e.rs:+4:34: +4:35
    scope 1 {
        debug v => _4;                   // in scope 1 at $DIR/try_identity_e2e.rs:+3:16: +3:17
    }
    scope 2 {
        debug e => _5;                   // in scope 2 at $DIR/try_identity_e2e.rs:+4:17: +4:18
    }

    bb0: {
        StorageLive(_2);                 // scope 0 at $DIR/try_identity_e2e.rs:+2:9: +5:10
        _3 = discriminant(_1);           // scope 0 at $DIR/try_identity_e2e.rs:+2:15: +2:16
        switchInt(move _3) -> [0_isize: bb3, 1_isize: bb1, otherwise: bb2]; // scope 0 at $DIR/try_identity_e2e.rs:+2:9: +2:16
    }

    bb1: {
        StorageLive(_5);                 // scope 0 at $DIR/try_identity_e2e.rs:+4:17: +4:18
        _5 = move ((_1 as Err).0: E);    // scope 0 at $DIR/try_identity_e2e.rs:+4:17: +4:18
        StorageLive(_6);                 // scope 2 at $DIR/try_identity_e2e.rs:+4:34: +4:35
        _6 = move _5;                    // scope 2 at $DIR/try_identity_e2e.rs:+4:34: +4:35
        Deinit(_0);                      // scope 2 at $DIR/try_identity_e2e.rs:+4:30: +4:36
        ((_0 as Err).0: E) = move _6;    // scope 2 at $DIR/try_identity_e2e.rs:+4:30: +4:36
        discriminant(_0) = 1;            // scope 2 at $DIR/try_identity_e2e.rs:+4:30: +4:36
        StorageDead(_6);                 // scope 2 at $DIR/try_identity_e2e.rs:+4:35: +4:36
        StorageDead(_5);                 // scope 0 at $DIR/try_identity_e2e.rs:+4:35: +4:36
        StorageDead(_2);                 // scope 0 at $DIR/try_identity_e2e.rs:+6:5: +6:6
        return;                          // scope 0 at $DIR/try_identity_e2e.rs:+7:1: +7:2
    }

    bb2: {
        unreachable;                     // scope 0 at $DIR/try_identity_e2e.rs:+2:15: +2:16
    }

    bb3: {
        StorageLive(_4);                 // scope 0 at $DIR/try_identity_e2e.rs:+3:16: +3:17
        _4 = move ((_1 as Ok).0: T);     // scope 0 at $DIR/try_identity_e2e.rs:+3:16: +3:17
        _2 = move _4;                    // scope 1 at $DIR/try_identity_e2e.rs:+3:22: +3:23
        StorageDead(_4);                 // scope 0 at $DIR/try_identity_e2e.rs:+3:22: +3:23
        Deinit(_0);                      // scope 0 at $DIR/try_identity_e2e.rs:+1:5: +6:6
        ((_0 as Ok).0: T) = move _2;     // scope 0 at $DIR/try_identity_e2e.rs:+1:5: +6:6
        discriminant(_0) = 0;            // scope 0 at $DIR/try_identity_e2e.rs:+1:5: +6:6
        StorageDead(_2);                 // scope 0 at $DIR/try_identity_e2e.rs:+6:5: +6:6
        return;                          // scope 0 at $DIR/try_identity_e2e.rs:+7:1: +7:2
    }
}