[INFO] fetching crate io-uring 0.5.1...
[INFO] checking io-uring-0.5.1 against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] extracting crate io-uring 0.5.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate io-uring 0.5.1 on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate io-uring 0.5.1
[INFO] finished tweaking crates.io crate io-uring 0.5.1
[INFO] tweaked toml for crates.io crate io-uring 0.5.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate io-uring 0.5.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15597b22cd5e37ee9e71463b4b3fb897a867ef9a5be38b5171b570d8532f0234
[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" "15597b22cd5e37ee9e71463b4b3fb897a867ef9a5be38b5171b570d8532f0234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15597b22cd5e37ee9e71463b4b3fb897a867ef9a5be38b5171b570d8532f0234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15597b22cd5e37ee9e71463b4b3fb897a867ef9a5be38b5171b570d8532f0234", kill_on_drop: false }`
[INFO] [stdout] 15597b22cd5e37ee9e71463b4b3fb897a867ef9a5be38b5171b570d8532f0234
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4aacc8a5a908831e8da49f5846b01424bc45d6d6f6f3f2977531a85ffcc91ade
[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" "4aacc8a5a908831e8da49f5846b01424bc45d6d6f6f3f2977531a85ffcc91ade", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling io-uring v0.5.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking nix v0.19.1
[INFO] [stdout] warning: reference to packed field is unaligned
[INFO] [stdout]    --> src/sys/sys.rs:545:13
[INFO] [stdout]     |
[INFO] [stdout] 545 | /             &(*(::core::ptr::null::<io_uring_sqe__bindgen_ty_4__bindgen_ty_1__bindgen_ty_1>()))
[INFO] [stdout] 546 | |                 .buf_index as *const _ as usize
[INFO] [stdout]     | |__________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unaligned_references)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
[INFO] [stdout]     = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: reference to packed field is unaligned
[INFO] [stdout]    --> src/sys/sys.rs:558:13
[INFO] [stdout]     |
[INFO] [stdout] 558 | /             &(*(::core::ptr::null::<io_uring_sqe__bindgen_ty_4__bindgen_ty_1__bindgen_ty_1>()))
[INFO] [stdout] 559 | |                 .buf_group as *const _ as usize
[INFO] [stdout]     | |__________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82523 <https://github.com/rust-lang/rust/issues/82523>
[INFO] [stdout]     = note: fields of packed structs are not properly aligned, and creating a misaligned reference is undefined behavior (even if that reference is never dereferenced)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.07s
[INFO] running `Command { std: "docker" "inspect" "4aacc8a5a908831e8da49f5846b01424bc45d6d6f6f3f2977531a85ffcc91ade", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4aacc8a5a908831e8da49f5846b01424bc45d6d6f6f3f2977531a85ffcc91ade", kill_on_drop: false }`
[INFO] [stdout] 4aacc8a5a908831e8da49f5846b01424bc45d6d6f6f3f2977531a85ffcc91ade