[INFO] fetching crate userland-io 0.1.0-alpha.4...
[INFO] checking userland-io-0.1.0-alpha.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate userland-io 0.1.0-alpha.4 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate userland-io 0.1.0-alpha.4 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate userland-io 0.1.0-alpha.4
[INFO] finished tweaking crates.io crate userland-io 0.1.0-alpha.4
[INFO] tweaked toml for crates.io crate userland-io 0.1.0-alpha.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 37 packages
[INFO] [stderr]       Adding bytes v0.6.0 (latest: v1.6.0)
[INFO] [stderr]       Adding mio v0.7.14 (latest: v0.8.11)
[INFO] [stderr]       Adding miow v0.3.7 (latest: v0.6.0)
[INFO] [stderr]       Adding ntapi v0.3.7 (latest: v0.4.1)
[INFO] [stderr]       Adding rmp-serde v0.14.4 (latest: v1.1.2)
[INFO] [stderr]       Adding tokio v0.3.7 (latest: v1.37.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rmp-serde v0.14.4
[INFO] [stderr]   Downloaded bytes v0.6.0
[INFO] [stderr]   Downloaded tokio v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ad4d522d2bc50350ac96252029be1bac96eefe0f695cd7980c7ab0b0dcfcad6
[INFO] running `Command { std: "docker" "start" "-a" "5ad4d522d2bc50350ac96252029be1bac96eefe0f695cd7980c7ab0b0dcfcad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ad4d522d2bc50350ac96252029be1bac96eefe0f695cd7980c7ab0b0dcfcad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ad4d522d2bc50350ac96252029be1bac96eefe0f695cd7980c7ab0b0dcfcad6", kill_on_drop: false }`
[INFO] [stdout] 5ad4d522d2bc50350ac96252029be1bac96eefe0f695cd7980c7ab0b0dcfcad6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3272d555fd36d61af59f9736cef829c9152c1522d38b53406f3e5abd954ea7d3
[INFO] running `Command { std: "docker" "start" "-a" "3272d555fd36d61af59f9736cef829c9152c1522d38b53406f3e5abd954ea7d3", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling tokio v0.3.7
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking rmp v0.8.12
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking rmp-serde v0.14.4
[INFO] [stderr]     Checking userland-io v0.1.0-alpha.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `NBD_OPT_PEEK_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub const NBD_OPT_PEEK_EXPORT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_OPT_PEEK_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub const NBD_OPT_PEEK_EXPORT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_INFO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub const NBD_REP_INFO: u32 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_META_CONTEXT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub const NBD_REP_META_CONTEXT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_POLICY` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub const NBD_REP_ERR_POLICY: u32 = 2 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_INVALID` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub const NBD_REP_ERR_INVALID: u32 = 3 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_PLATFORM` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:28:15
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub const NBD_REP_ERR_PLATFORM: u32 = 4 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_TLS_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:29:15
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub const NBD_REP_ERR_TLS_REQD: u32 = 5 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_UNKNOWN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub const NBD_REP_ERR_UNKNOWN: u32 = 6 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_BLOCK_SIZE_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const NBD_REP_ERR_BLOCK_SIZE_REQD: u32 = 8 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:42:15
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub const NBD_INFO_EXPORT: u16 = 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_NAME` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:43:15
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub const NBD_INFO_NAME: u16 = 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_DESCRIPTION` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:44:15
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub const NBD_INFO_DESCRIPTION: u16 = 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_BLOCK_SIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub const NBD_INFO_BLOCK_SIZE: u16 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:52:15
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub const NBD_FLAG_SEND_FUA: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_WRITE_ZEROES` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:55:15
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub const NBD_FLAG_SEND_WRITE_ZEROES: u16 = 1 << 6;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_CAN_MULTI_CONN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:56:15
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub const NBD_FLAG_CAN_MULTI_CONN: u16 = 1 << 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub const NBD_CMD_FLAG_FUA: u16 = 1 << 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_NO_HOLE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:62:15
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub const NBD_CMD_FLAG_NO_HOLE: u16 = 1 << 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FLAG_DF` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:63:15
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub const NBD_CMD_FLAG_FLAG_DF: u16 = 1 << 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_REQ_ONE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:64:15
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub const NBD_CMD_FLAG_REQ_ONE: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FAST_ZERO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:65:15
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub const NBD_CMD_FLAG_FAST_ZERO: u16 = 1 << 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_CACHE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:73:15
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub const NBD_CMD_CACHE: u16 = 5;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_BLOCK_STATUS` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub const NBD_CMD_BLOCK_STATUS: u16 = 7;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_RESIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:76:15
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub const NBD_CMD_RESIZE: u16 = 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_INFO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub const NBD_REP_INFO: u32 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_META_CONTEXT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub const NBD_REP_META_CONTEXT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_POLICY` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub const NBD_REP_ERR_POLICY: u32 = 2 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_INVALID` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub const NBD_REP_ERR_INVALID: u32 = 3 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_PLATFORM` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:28:15
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub const NBD_REP_ERR_PLATFORM: u32 = 4 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_TLS_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:29:15
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub const NBD_REP_ERR_TLS_REQD: u32 = 5 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_UNKNOWN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub const NBD_REP_ERR_UNKNOWN: u32 = 6 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_BLOCK_SIZE_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const NBD_REP_ERR_BLOCK_SIZE_REQD: u32 = 8 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:42:15
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub const NBD_INFO_EXPORT: u16 = 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_NAME` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:43:15
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub const NBD_INFO_NAME: u16 = 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_DESCRIPTION` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:44:15
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub const NBD_INFO_DESCRIPTION: u16 = 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_BLOCK_SIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub const NBD_INFO_BLOCK_SIZE: u16 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:52:15
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub const NBD_FLAG_SEND_FUA: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_WRITE_ZEROES` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:55:15
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub const NBD_FLAG_SEND_WRITE_ZEROES: u16 = 1 << 6;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_CAN_MULTI_CONN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:56:15
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub const NBD_FLAG_CAN_MULTI_CONN: u16 = 1 << 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub const NBD_CMD_FLAG_FUA: u16 = 1 << 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_NO_HOLE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:62:15
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub const NBD_CMD_FLAG_NO_HOLE: u16 = 1 << 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FLAG_DF` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:63:15
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub const NBD_CMD_FLAG_FLAG_DF: u16 = 1 << 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_REQ_ONE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:64:15
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub const NBD_CMD_FLAG_REQ_ONE: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FAST_ZERO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:65:15
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub const NBD_CMD_FLAG_FAST_ZERO: u16 = 1 << 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_CACHE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:73:15
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub const NBD_CMD_CACHE: u16 = 5;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_BLOCK_STATUS` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub const NBD_CMD_BLOCK_STATUS: u16 = 7;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_RESIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:76:15
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub const NBD_CMD_RESIZE: u16 = 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.40s
[INFO] running `Command { std: "docker" "inspect" "3272d555fd36d61af59f9736cef829c9152c1522d38b53406f3e5abd954ea7d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3272d555fd36d61af59f9736cef829c9152c1522d38b53406f3e5abd954ea7d3", kill_on_drop: false }`
[INFO] [stdout] 3272d555fd36d61af59f9736cef829c9152c1522d38b53406f3e5abd954ea7d3
[INFO] checking userland-io-0.1.0-alpha.4 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate userland-io 0.1.0-alpha.4 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate userland-io 0.1.0-alpha.4 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate userland-io 0.1.0-alpha.4
[INFO] finished tweaking crates.io crate userland-io 0.1.0-alpha.4
[INFO] tweaked toml for crates.io crate userland-io 0.1.0-alpha.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91baaec13b6d9d1e0c7bbfa1f4d346e5a6ed3ef64a6947fd7dbd96755712c595
[INFO] running `Command { std: "docker" "start" "-a" "91baaec13b6d9d1e0c7bbfa1f4d346e5a6ed3ef64a6947fd7dbd96755712c595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91baaec13b6d9d1e0c7bbfa1f4d346e5a6ed3ef64a6947fd7dbd96755712c595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91baaec13b6d9d1e0c7bbfa1f4d346e5a6ed3ef64a6947fd7dbd96755712c595", kill_on_drop: false }`
[INFO] [stdout] 91baaec13b6d9d1e0c7bbfa1f4d346e5a6ed3ef64a6947fd7dbd96755712c595
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2134b1e90b258f2a229c97e90f419249e7a97b5e10e33c36327183b9fc590b2
[INFO] running `Command { std: "docker" "start" "-a" "b2134b1e90b258f2a229c97e90f419249e7a97b5e10e33c36327183b9fc590b2", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling tokio v0.3.7
[INFO] [stderr]     Checking mio v0.7.14
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking rmp v0.8.12
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking rmp-serde v0.14.4
[INFO] [stderr]     Checking userland-io v0.1.0-alpha.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant `NBD_OPT_PEEK_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub const NBD_OPT_PEEK_EXPORT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_INFO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub const NBD_REP_INFO: u32 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_META_CONTEXT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub const NBD_REP_META_CONTEXT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_POLICY` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub const NBD_REP_ERR_POLICY: u32 = 2 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_INVALID` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub const NBD_REP_ERR_INVALID: u32 = 3 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_PLATFORM` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:28:15
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub const NBD_REP_ERR_PLATFORM: u32 = 4 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_TLS_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:29:15
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub const NBD_REP_ERR_TLS_REQD: u32 = 5 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_UNKNOWN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub const NBD_REP_ERR_UNKNOWN: u32 = 6 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_BLOCK_SIZE_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const NBD_REP_ERR_BLOCK_SIZE_REQD: u32 = 8 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:42:15
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub const NBD_INFO_EXPORT: u16 = 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_NAME` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:43:15
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub const NBD_INFO_NAME: u16 = 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_DESCRIPTION` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:44:15
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub const NBD_INFO_DESCRIPTION: u16 = 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_BLOCK_SIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub const NBD_INFO_BLOCK_SIZE: u16 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:52:15
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub const NBD_FLAG_SEND_FUA: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_WRITE_ZEROES` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:55:15
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub const NBD_FLAG_SEND_WRITE_ZEROES: u16 = 1 << 6;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_CAN_MULTI_CONN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:56:15
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub const NBD_FLAG_CAN_MULTI_CONN: u16 = 1 << 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub const NBD_CMD_FLAG_FUA: u16 = 1 << 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_NO_HOLE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:62:15
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub const NBD_CMD_FLAG_NO_HOLE: u16 = 1 << 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FLAG_DF` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:63:15
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub const NBD_CMD_FLAG_FLAG_DF: u16 = 1 << 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_REQ_ONE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:64:15
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub const NBD_CMD_FLAG_REQ_ONE: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FAST_ZERO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:65:15
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub const NBD_CMD_FLAG_FAST_ZERO: u16 = 1 << 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_CACHE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:73:15
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub const NBD_CMD_CACHE: u16 = 5;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_BLOCK_STATUS` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub const NBD_CMD_BLOCK_STATUS: u16 = 7;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_RESIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:76:15
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub const NBD_CMD_RESIZE: u16 = 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_OPT_PEEK_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub const NBD_OPT_PEEK_EXPORT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_INFO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:22:15
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub const NBD_REP_INFO: u32 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_META_CONTEXT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub const NBD_REP_META_CONTEXT: u32 = 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_POLICY` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:26:15
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub const NBD_REP_ERR_POLICY: u32 = 2 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_INVALID` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub const NBD_REP_ERR_INVALID: u32 = 3 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_PLATFORM` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:28:15
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub const NBD_REP_ERR_PLATFORM: u32 = 4 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_TLS_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:29:15
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub const NBD_REP_ERR_TLS_REQD: u32 = 5 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_UNKNOWN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub const NBD_REP_ERR_UNKNOWN: u32 = 6 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_REP_ERR_BLOCK_SIZE_REQD` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:31:15
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub const NBD_REP_ERR_BLOCK_SIZE_REQD: u32 = 8 | NBD_REP_FLAG_ERROR;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_EXPORT` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:42:15
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub const NBD_INFO_EXPORT: u16 = 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_NAME` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:43:15
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub const NBD_INFO_NAME: u16 = 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_DESCRIPTION` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:44:15
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub const NBD_INFO_DESCRIPTION: u16 = 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_INFO_BLOCK_SIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub const NBD_INFO_BLOCK_SIZE: u16 = 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:52:15
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub const NBD_FLAG_SEND_FUA: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_SEND_WRITE_ZEROES` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:55:15
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub const NBD_FLAG_SEND_WRITE_ZEROES: u16 = 1 << 6;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_FLAG_CAN_MULTI_CONN` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:56:15
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub const NBD_FLAG_CAN_MULTI_CONN: u16 = 1 << 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FUA` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:61:15
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub const NBD_CMD_FLAG_FUA: u16 = 1 << 0;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_NO_HOLE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:62:15
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub const NBD_CMD_FLAG_NO_HOLE: u16 = 1 << 1;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FLAG_DF` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:63:15
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub const NBD_CMD_FLAG_FLAG_DF: u16 = 1 << 2;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_REQ_ONE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:64:15
[INFO] [stdout]    |
[INFO] [stdout] 64 |     pub const NBD_CMD_FLAG_REQ_ONE: u16 = 1 << 3;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_FLAG_FAST_ZERO` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:65:15
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub const NBD_CMD_FLAG_FAST_ZERO: u16 = 1 << 4;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_CACHE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:73:15
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub const NBD_CMD_CACHE: u16 = 5;
[INFO] [stdout]    |               ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_BLOCK_STATUS` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub const NBD_CMD_BLOCK_STATUS: u16 = 7;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NBD_CMD_RESIZE` is never used
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:76:15
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub const NBD_CMD_RESIZE: u16 = 8;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.85s
[INFO] running `Command { std: "docker" "inspect" "b2134b1e90b258f2a229c97e90f419249e7a97b5e10e33c36327183b9fc590b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2134b1e90b258f2a229c97e90f419249e7a97b5e10e33c36327183b9fc590b2", kill_on_drop: false }`
[INFO] [stdout] b2134b1e90b258f2a229c97e90f419249e7a97b5e10e33c36327183b9fc590b2