[INFO] fetching crate nbd-async 0.6.0...
[INFO] checking nbd-async-0.6.0 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] extracting crate nbd-async 0.6.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate nbd-async 0.6.0 on toolchain 38352b01ae4af9300be03b805d6db68c45e51068
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-7-tc1/source/Cargo.toml
[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" "+38352b01ae4af9300be03b805d6db68c45e51068" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b470e48fe1fab706582a2e1b87ac3f5ae6a32650d86c5c9023b83c899c0a4d2
[INFO] running `Command { std: "docker" "start" "-a" "7b470e48fe1fab706582a2e1b87ac3f5ae6a32650d86c5c9023b83c899c0a4d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b470e48fe1fab706582a2e1b87ac3f5ae6a32650d86c5c9023b83c899c0a4d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b470e48fe1fab706582a2e1b87ac3f5ae6a32650d86c5c9023b83c899c0a4d2", kill_on_drop: false }`
[INFO] [stdout] 7b470e48fe1fab706582a2e1b87ac3f5ae6a32650d86c5c9023b83c899c0a4d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80fdd295cb1114ff78d1849424a4e06dbf2635abcdd82f804aa1c6cf66d41a48
[INFO] running `Command { std: "docker" "start" "-a" "80fdd295cb1114ff78d1849424a4e06dbf2635abcdd82f804aa1c6cf66d41a48", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling async-trait v0.1.56
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]     Checking futures-util v0.3.21
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.8.3
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking nix v0.24.1
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]     Checking tokio v1.19.2
[INFO] [stderr]     Checking 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)]` 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)]` 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.13s
[INFO] running `Command { std: "docker" "inspect" "80fdd295cb1114ff78d1849424a4e06dbf2635abcdd82f804aa1c6cf66d41a48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80fdd295cb1114ff78d1849424a4e06dbf2635abcdd82f804aa1c6cf66d41a48", kill_on_drop: false }`
[INFO] [stdout] 80fdd295cb1114ff78d1849424a4e06dbf2635abcdd82f804aa1c6cf66d41a48