[INFO] fetching crate tagged_ptr 0.1.0...
[INFO] checking tagged_ptr-0.1.0 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate tagged_ptr 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate tagged_ptr 0.1.0 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tagged_ptr 0.1.0
[INFO] finished tweaking crates.io crate tagged_ptr 0.1.0
[INFO] tweaked toml for crates.io crate tagged_ptr 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a86aaf6a3787e8eee8a679124c49883ce457a62549c6e53e52bd0bd99861f41e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a86aaf6a3787e8eee8a679124c49883ce457a62549c6e53e52bd0bd99861f41e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a86aaf6a3787e8eee8a679124c49883ce457a62549c6e53e52bd0bd99861f41e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a86aaf6a3787e8eee8a679124c49883ce457a62549c6e53e52bd0bd99861f41e", kill_on_drop: false }`
[INFO] [stdout] a86aaf6a3787e8eee8a679124c49883ce457a62549c6e53e52bd0bd99861f41e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac315636a342e6c3d01fa52e88633e11ba0ddd303bd7f452073ee5c8ab4ed650
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ac315636a342e6c3d01fa52e88633e11ba0ddd303bd7f452073ee5c8ab4ed650", kill_on_drop: false }`
[INFO] [stderr]     Checking tagged_ptr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `orig`
[INFO] [stdout]    --> src/tagged_ptr.rs:118:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     orig: &'a mut Packed<A, B, C, D, E, F, G, H>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `rc_raw` has been stable since 1.17.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(rc_raw)]
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/tagged_ptr.rs:217:32
[INFO] [stdout]     |
[INFO] [stdout] 217 |         let x: X = Unpacked::B(rc);
[INFO] [stdout]     |                                ^^ expected struct `Rc`, found struct `Box`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<u32>`
[INFO] [stdout]                found struct `Box<Rc<{integer}>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/tagged_ptr.rs:230:32
[INFO] [stdout]     |
[INFO] [stdout] 230 |         let x: X = Unpacked::B(rc);
[INFO] [stdout]     |                                ^^ expected struct `Rc`, found struct `Box`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<u32>`
[INFO] [stdout]                found struct `Box<Rc<{integer}>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tagged_ptr`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "ac315636a342e6c3d01fa52e88633e11ba0ddd303bd7f452073ee5c8ab4ed650", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac315636a342e6c3d01fa52e88633e11ba0ddd303bd7f452073ee5c8ab4ed650", kill_on_drop: false }`
[INFO] [stdout] ac315636a342e6c3d01fa52e88633e11ba0ddd303bd7f452073ee5c8ab4ed650