[INFO] fetching crate nbd-async 0.6.0...
[INFO] testing nbd-async-0.6.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate nbd-async 0.6.0 into /workspace/builds/worker-1-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-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nbd-async 0.6.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-trait v0.1.56
[INFO] [stderr]   Downloaded nix v0.24.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50b791f9d0fa668eb865b00270f04b81b7ccfc1dfbbfb9e777395d9d5a1bade1
[INFO] running `Command { std: "docker" "start" "-a" "50b791f9d0fa668eb865b00270f04b81b7ccfc1dfbbfb9e777395d9d5a1bade1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50b791f9d0fa668eb865b00270f04b81b7ccfc1dfbbfb9e777395d9d5a1bade1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50b791f9d0fa668eb865b00270f04b81b7ccfc1dfbbfb9e777395d9d5a1bade1", kill_on_drop: false }`
[INFO] [stdout] 50b791f9d0fa668eb865b00270f04b81b7ccfc1dfbbfb9e777395d9d5a1bade1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a565f6d4eb3de3d07ea9dad6d325ab133df0627fbbbc94b8bad841431e6d22ba
[INFO] running `Command { std: "docker" "start" "-a" "a565f6d4eb3de3d07ea9dad6d325ab133df0627fbbbc94b8bad841431e6d22ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]    Compiling futures-util v0.3.21
[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 7.54s
[INFO] running `Command { std: "docker" "inspect" "a565f6d4eb3de3d07ea9dad6d325ab133df0627fbbbc94b8bad841431e6d22ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a565f6d4eb3de3d07ea9dad6d325ab133df0627fbbbc94b8bad841431e6d22ba", kill_on_drop: false }`
[INFO] [stdout] a565f6d4eb3de3d07ea9dad6d325ab133df0627fbbbc94b8bad841431e6d22ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6406dc351b37675b00485b5a60ea586ddf36506d317811493149186dae0028c0
[INFO] running `Command { std: "docker" "start" "-a" "6406dc351b37675b00485b5a60ea586ddf36506d317811493149186dae0028c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling once_cell v1.12.0
[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 6.10s
[INFO] running `Command { std: "docker" "inspect" "6406dc351b37675b00485b5a60ea586ddf36506d317811493149186dae0028c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6406dc351b37675b00485b5a60ea586ddf36506d317811493149186dae0028c0", kill_on_drop: false }`
[INFO] [stdout] 6406dc351b37675b00485b5a60ea586ddf36506d317811493149186dae0028c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1506dcb176258486ddab9f69275e435bac9fd8e875ca5c11a9e1adee4572f58e
[INFO] running `Command { std: "docker" "start" "-a" "1506dcb176258486ddab9f69275e435bac9fd8e875ca5c11a9e1adee4572f58e", kill_on_drop: false }`
[INFO] [stderr] warning: fields `fua` and `no_hole` are never read
[INFO] [stdout] 
[INFO] [stderr]   --> src/nbd.rs:24:9
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 22 | pub struct RequestFlags {
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |            ------------ fields in this struct
[INFO] [stdout] 
[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 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/nbd_async-07c37446b995f5d7)
[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" "1506dcb176258486ddab9f69275e435bac9fd8e875ca5c11a9e1adee4572f58e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1506dcb176258486ddab9f69275e435bac9fd8e875ca5c11a9e1adee4572f58e", kill_on_drop: false }`
[INFO] [stdout] 1506dcb176258486ddab9f69275e435bac9fd8e875ca5c11a9e1adee4572f58e