[INFO] fetching crate userland-io 0.1.0-alpha.4...
[INFO] checking userland-io-0.1.0-alpha.4 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate userland-io 0.1.0-alpha.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate userland-io 0.1.0-alpha.4 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 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/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ab3640b56e163c4086cadc9f1053741415548afc65c7e916d2577a1d3b9f7b9
[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" "5ab3640b56e163c4086cadc9f1053741415548afc65c7e916d2577a1d3b9f7b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ab3640b56e163c4086cadc9f1053741415548afc65c7e916d2577a1d3b9f7b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ab3640b56e163c4086cadc9f1053741415548afc65c7e916d2577a1d3b9f7b9", kill_on_drop: false }`
[INFO] [stdout] 5ab3640b56e163c4086cadc9f1053741415548afc65c7e916d2577a1d3b9f7b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86897f3dab5410508a65744e31ce84ce07a5b81a589f5198af3a42770b6484f1
[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" "86897f3dab5410508a65744e31ce84ce07a5b81a589f5198af3a42770b6484f1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking bytes v0.6.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking futures-channel v0.3.12
[INFO] [stderr]    Compiling tokio v0.3.7
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]     Checking rmp v0.8.10
[INFO] [stderr]    Compiling futures-macro v0.3.12
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling async-trait v0.1.42
[INFO] [stderr]     Checking futures-util v0.3.12
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]     Checking futures v0.3.12
[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 is never used: `NBD_OPT_PEEK_EXPORT`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:13:5
[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 is never used: `NBD_REP_INFO`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub const NBD_REP_INFO: u32 = 3;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_REP_META_CONTEXT`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub const NBD_REP_META_CONTEXT: u32 = 4;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_REP_ERR_POLICY`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:26:5
[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 is never used: `NBD_REP_ERR_INVALID`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:27:5
[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 is never used: `NBD_REP_ERR_PLATFORM`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:28:5
[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 is never used: `NBD_REP_ERR_TLS_REQD`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:29:5
[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 is never used: `NBD_REP_ERR_UNKNOWN`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:30:5
[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 is never used: `NBD_REP_ERR_BLOCK_SIZE_REQD`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:31:5
[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 is never used: `NBD_INFO_EXPORT`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub const NBD_INFO_EXPORT: u16 = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_INFO_NAME`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub const NBD_INFO_NAME: u16 = 1;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_INFO_DESCRIPTION`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub const NBD_INFO_DESCRIPTION: u16 = 2;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_INFO_BLOCK_SIZE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub const NBD_INFO_BLOCK_SIZE: u16 = 3;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_FLAG_SEND_FUA`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub const NBD_FLAG_SEND_FUA: u16 = 1 << 3;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_FLAG_SEND_WRITE_ZEROES`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:55:5
[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 is never used: `NBD_FLAG_CAN_MULTI_CONN`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:56:5
[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 is never used: `NBD_CMD_FLAG_FUA`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub const NBD_CMD_FLAG_FUA: u16 = 1 << 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_CMD_FLAG_NO_HOLE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:62:5
[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 is never used: `NBD_CMD_FLAG_FLAG_DF`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:63:5
[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 is never used: `NBD_CMD_FLAG_REQ_ONE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:64:5
[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 is never used: `NBD_CMD_FLAG_FAST_ZERO`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:65:5
[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 is never used: `NBD_CMD_CACHE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub const NBD_CMD_CACHE: u16 = 5;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_CMD_BLOCK_STATUS`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub const NBD_CMD_BLOCK_STATUS: u16 = 7;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_CMD_RESIZE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:76:5
[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 is never used: `NBD_OPT_PEEK_EXPORT`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:13:5
[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 is never used: `NBD_REP_INFO`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub const NBD_REP_INFO: u32 = 3;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_REP_META_CONTEXT`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub const NBD_REP_META_CONTEXT: u32 = 4;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_REP_ERR_POLICY`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:26:5
[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 is never used: `NBD_REP_ERR_INVALID`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:27:5
[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 is never used: `NBD_REP_ERR_PLATFORM`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:28:5
[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 is never used: `NBD_REP_ERR_TLS_REQD`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:29:5
[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 is never used: `NBD_REP_ERR_UNKNOWN`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:30:5
[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 is never used: `NBD_REP_ERR_BLOCK_SIZE_REQD`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:31:5
[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 is never used: `NBD_INFO_EXPORT`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub const NBD_INFO_EXPORT: u16 = 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_INFO_NAME`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub const NBD_INFO_NAME: u16 = 1;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_INFO_DESCRIPTION`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub const NBD_INFO_DESCRIPTION: u16 = 2;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_INFO_BLOCK_SIZE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub const NBD_INFO_BLOCK_SIZE: u16 = 3;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_FLAG_SEND_FUA`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub const NBD_FLAG_SEND_FUA: u16 = 1 << 3;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_FLAG_SEND_WRITE_ZEROES`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:55:5
[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 is never used: `NBD_FLAG_CAN_MULTI_CONN`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:56:5
[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 is never used: `NBD_CMD_FLAG_FUA`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub const NBD_CMD_FLAG_FUA: u16 = 1 << 0;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_CMD_FLAG_NO_HOLE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:62:5
[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 is never used: `NBD_CMD_FLAG_FLAG_DF`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:63:5
[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 is never used: `NBD_CMD_FLAG_REQ_ONE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:64:5
[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 is never used: `NBD_CMD_FLAG_FAST_ZERO`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:65:5
[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 is never used: `NBD_CMD_CACHE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 |     pub const NBD_CMD_CACHE: u16 = 5;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_CMD_BLOCK_STATUS`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub const NBD_CMD_BLOCK_STATUS: u16 = 7;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `NBD_CMD_RESIZE`
[INFO] [stdout]   --> src/transport/nbd/protocol/mod.rs:76:5
[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 [unoptimized + debuginfo] target(s) in 41.50s
[INFO] running `Command { std: "docker" "inspect" "86897f3dab5410508a65744e31ce84ce07a5b81a589f5198af3a42770b6484f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86897f3dab5410508a65744e31ce84ce07a5b81a589f5198af3a42770b6484f1", kill_on_drop: false }`
[INFO] [stdout] 86897f3dab5410508a65744e31ce84ce07a5b81a589f5198af3a42770b6484f1