[INFO] fetching crate nbd-async 0.6.0...
[INFO] testing nbd-async-0.6.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate nbd-async 0.6.0 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate nbd-async 0.6.0
[INFO] finished tweaking crates.io crate nbd-async 0.6.0
[INFO] tweaked toml for crates.io crate nbd-async 0.6.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nbd-async 0.6.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nbd-async 0.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-macros v1.8.0
[INFO] [stderr]   Downloaded num_cpus v1.13.1
[INFO] [stderr]   Downloaded once_cell v1.12.0
[INFO] [stderr]   Downloaded mio v0.8.3
[INFO] [stderr]   Downloaded unicode-ident v1.0.1
[INFO] [stderr]   Downloaded socket2 v0.4.4
[INFO] [stderr]   Downloaded proc-macro2 v1.0.39
[INFO] [stderr]   Downloaded syn v1.0.96
[INFO] [stderr]   Downloaded nix v0.24.1
[INFO] [stderr]   Downloaded tokio v1.19.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba5e3fb1683019331f02452352a5b021218d837e0966b509b661fd8daf1badd9
[INFO] running `Command { std: "docker" "start" "-a" "ba5e3fb1683019331f02452352a5b021218d837e0966b509b661fd8daf1badd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba5e3fb1683019331f02452352a5b021218d837e0966b509b661fd8daf1badd9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba5e3fb1683019331f02452352a5b021218d837e0966b509b661fd8daf1badd9", kill_on_drop: false }`
[INFO] [stdout] ba5e3fb1683019331f02452352a5b021218d837e0966b509b661fd8daf1badd9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc3e9708b24ba4a3666b875457f8dfbe6417a2cefc4ca34925769d5ac959c76c
[INFO] running `Command { std: "docker" "start" "-a" "fc3e9708b24ba4a3666b875457f8dfbe6417a2cefc4ca34925769d5ac959c76c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling socket2 v0.4.4
[INFO] [stderr]    Compiling mio v0.8.3
[INFO] [stderr]    Compiling nix v0.24.1
[INFO] [stderr]    Compiling tokio v1.19.2
[INFO] [stderr]    Compiling nbd-async v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `fua` and `no_hole` are never read
[INFO] [stdout]   --> src/nbd.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct RequestFlags {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 23 |     /// Force Unit Access flag.
[INFO] [stdout] 24 |     pub fua: bool,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 25 |     /// No Hole flag.
[INFO] [stdout] 26 |     pub no_hole: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RequestFlags` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `magic` and `flags` are never read
[INFO] [stdout]   --> src/nbd.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Request {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 31 |     pub magic: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 32 |     pub command: Command,
[INFO] [stdout] 33 |     pub flags: RequestFlags,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.72s
[INFO] running `Command { std: "docker" "inspect" "fc3e9708b24ba4a3666b875457f8dfbe6417a2cefc4ca34925769d5ac959c76c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc3e9708b24ba4a3666b875457f8dfbe6417a2cefc4ca34925769d5ac959c76c", kill_on_drop: false }`
[INFO] [stdout] fc3e9708b24ba4a3666b875457f8dfbe6417a2cefc4ca34925769d5ac959c76c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d9465e6648323900eb3efc959dcb8c5ac10c08d670adf2db22ae6d30b7b4075
[INFO] running `Command { std: "docker" "start" "-a" "2d9465e6648323900eb3efc959dcb8c5ac10c08d670adf2db22ae6d30b7b4075", kill_on_drop: false }`
[INFO] [stderr]    Compiling once_cell v1.12.0
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling tokio v1.19.2
[INFO] [stderr]    Compiling nbd-async v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `fua` and `no_hole` are never read
[INFO] [stdout]   --> src/nbd.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct RequestFlags {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 23 |     /// Force Unit Access flag.
[INFO] [stdout] 24 |     pub fua: bool,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 25 |     /// No Hole flag.
[INFO] [stdout] 26 |     pub no_hole: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RequestFlags` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `magic` and `flags` are never read
[INFO] [stdout]   --> src/nbd.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Request {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 31 |     pub magic: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 32 |     pub command: Command,
[INFO] [stdout] 33 |     pub flags: RequestFlags,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `fua` and `no_hole` are never read
[INFO] [stdout]   --> src/nbd.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct RequestFlags {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 23 |     /// Force Unit Access flag.
[INFO] [stdout] 24 |     pub fua: bool,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 25 |     /// No Hole flag.
[INFO] [stdout] 26 |     pub no_hole: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RequestFlags` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `magic` and `flags` are never read
[INFO] [stdout]   --> src/nbd.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Request {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 31 |     pub magic: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 32 |     pub command: Command,
[INFO] [stdout] 33 |     pub flags: RequestFlags,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.36s
[INFO] running `Command { std: "docker" "inspect" "2d9465e6648323900eb3efc959dcb8c5ac10c08d670adf2db22ae6d30b7b4075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d9465e6648323900eb3efc959dcb8c5ac10c08d670adf2db22ae6d30b7b4075", kill_on_drop: false }`
[INFO] [stdout] 2d9465e6648323900eb3efc959dcb8c5ac10c08d670adf2db22ae6d30b7b4075
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4f777e44f5048f2cd6583764bfcd124041b35401dd66f2b941236926034ae24e
[INFO] running `Command { std: "docker" "start" "-a" "4f777e44f5048f2cd6583764bfcd124041b35401dd66f2b941236926034ae24e", kill_on_drop: false }`
[INFO] [stderr] warning: fields `fua` and `no_hole` are never read
[INFO] [stderr]   --> src/nbd.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub struct RequestFlags {
[INFO] [stderr]    |            ------------ fields in this struct
[INFO] [stderr] 23 |     /// Force Unit Access flag.
[INFO] [stderr] 24 |     pub fua: bool,
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 25 |     /// No Hole flag.
[INFO] [stderr] 26 |     pub no_hole: bool,
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `RequestFlags` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `magic` and `flags` are never read
[INFO] [stderr]   --> src/nbd.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub struct Request {
[INFO] [stderr]    |            ------- fields in this struct
[INFO] [stderr] 31 |     pub magic: u32,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 32 |     pub command: Command,
[INFO] [stderr] 33 |     pub flags: RequestFlags,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Request` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `nbd-async` (lib) generated 2 warnings
[INFO] [stderr] warning: `nbd-async` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/nbd_async-1fda2bb275d8228f)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nbd_async
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4f777e44f5048f2cd6583764bfcd124041b35401dd66f2b941236926034ae24e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f777e44f5048f2cd6583764bfcd124041b35401dd66f2b941236926034ae24e", kill_on_drop: false }`
[INFO] [stdout] 4f777e44f5048f2cd6583764bfcd124041b35401dd66f2b941236926034ae24e