[INFO] fetching crate youki 0.3.0...
[INFO] checking youki-0.3.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate youki 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate youki 0.3.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate youki 0.3.0
[INFO] finished tweaking crates.io crate youki 0.3.0
[INFO] tweaked toml for crates.io crate youki 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate youki 0.3.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00640d2b48f9278c57b04601199bf246061d7553edd406271a4f66691160b9cb
[INFO] running `Command { std: "docker" "start" "-a" "00640d2b48f9278c57b04601199bf246061d7553edd406271a4f66691160b9cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00640d2b48f9278c57b04601199bf246061d7553edd406271a4f66691160b9cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00640d2b48f9278c57b04601199bf246061d7553edd406271a4f66691160b9cb", kill_on_drop: false }`
[INFO] [stdout] 00640d2b48f9278c57b04601199bf246061d7553edd406271a4f66691160b9cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6ca9d831ab8b986261416633afc70ea81e77df5e69a9a8013d4d6d9a4b84510
[INFO] running `Command { std: "docker" "start" "-a" "e6ca9d831ab8b986261416633afc70ea81e77df5e69a9a8013d4d6d9a4b84510", kill_on_drop: false }`
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[INFO] [stderr]    Compiling youki v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling protobuf-parse v3.2.0
[INFO] [stderr]     Checking caps v0.5.5
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[INFO] [stderr]     Checking parking_lot v0.12.1
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[INFO] [stderr]    Compiling serial_test_derive v2.0.0
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[INFO] [stderr]     Checking serial_test v2.0.0
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[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking oci-spec v0.6.3
[INFO] [stderr]     Checking tracing-subscriber v0.3.17
[INFO] [stderr]    Compiling rust-criu v0.4.0
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[INFO] [stderr]     Checking libcgroups v0.3.0
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[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/commands/kill.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{convert::TryInto, path::PathBuf};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `nix` is imported redundantly
[INFO] [stdout]  --> src/commands/spec_json.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use nix;
[INFO] [stdout]   |     ^^^ the item `nix` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libcgroups` is imported redundantly
[INFO] [stdout]  --> src/commands/update.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libcgroups::{self, common::ControllerOpt};
[INFO] [stdout]   |                  ^^^^ the item `libcgroups` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/commands/kill.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{convert::TryInto, path::PathBuf};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `nix` is imported redundantly
[INFO] [stdout]  --> src/commands/spec_json.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use nix;
[INFO] [stdout]   |     ^^^ the item `nix` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `libcgroups` is imported redundantly
[INFO] [stdout]  --> src/commands/update.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | use libcgroups::{self, common::ControllerOpt};
[INFO] [stdout]   |                  ^^^^ the item `libcgroups` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]   --> src/rootpath.rs:81:27
[INFO] [stdout]    |
[INFO] [stdout] 80 |     use super::*;
[INFO] [stdout]    |         -------- the item `Result` is already imported here
[INFO] [stdout] 81 |     use anyhow::{Context, Result};
[INFO] [stdout]    |                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Mode` is imported redundantly
[INFO] [stdout]   --> src/rootpath.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     use super::*;
[INFO] [stdout]    |         -------- the item `Mode` is already imported here
[INFO] [stdout] 81 |     use anyhow::{Context, Result};
[INFO] [stdout] 82 |     use nix::sys::stat::Mode;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `getuid` is imported redundantly
[INFO] [stdout]   --> src/rootpath.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     use super::*;
[INFO] [stdout]    |         -------- the item `getuid` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 83 |     use nix::unistd::getuid;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fs` is imported redundantly
[INFO] [stdout]   --> src/rootpath.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     use super::*;
[INFO] [stdout]    |         -------- the item `fs` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 84 |     use std::fs;
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PathBuf` is imported redundantly
[INFO] [stdout]   --> src/rootpath.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     use super::*;
[INFO] [stdout]    |         -------- the item `PathBuf` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 87 |     use std::path::PathBuf;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `systemd_log` is never read
[INFO] [stdout]   --> src/observability.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct ObservabilityConfig {
[INFO] [stdout]    |            ------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub systemd_log: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ObservabilityConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `systemd_log` is never read
[INFO] [stdout]   --> src/observability.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct ObservabilityConfig {
[INFO] [stdout]    |            ------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 51 |     pub systemd_log: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ObservabilityConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.50s
[INFO] running `Command { std: "docker" "inspect" "e6ca9d831ab8b986261416633afc70ea81e77df5e69a9a8013d4d6d9a4b84510", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6ca9d831ab8b986261416633afc70ea81e77df5e69a9a8013d4d6d9a4b84510", kill_on_drop: false }`
[INFO] [stdout] e6ca9d831ab8b986261416633afc70ea81e77df5e69a9a8013d4d6d9a4b84510