[INFO] fetching crate rustcracker 1.1.1+deprecated...
[INFO] checking rustcracker-1.1.1+deprecated against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3
[INFO] extracting crate rustcracker 1.1.1+deprecated into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rustcracker 1.1.1+deprecated
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rustcracker 1.1.1+deprecated
[INFO] tweaked toml for crates.io crate rustcracker 1.1.1+deprecated written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustcracker 1.1.1+deprecated on toolchain a5689b034ad287112f709693384a37f1377eb9cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rustcracker 1.1.1+deprecated 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" "+a5689b034ad287112f709693384a37f1377eb9cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7
[INFO] running `Command { std: "docker" "start" "b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.169
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[INFO] [stderr]     Checking rustcracker v1.1.1+deprecated (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `FirecrackerOption` is never constructed
[INFO] [stdout]  --> src/instance/firecracker.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct FirecrackerOption {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/instance/firecracker.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl FirecrackerOption {
[INFO] [stdout]    | ---------------------- associated function in this implementation
[INFO] [stdout] 69 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `JailerOption` is never constructed
[INFO] [stdout]  --> src/instance/jailer.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct JailerOption {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::string::String`
[INFO] [stdout]   --> src/firecracker/sync.rs:52:76
[INFO] [stdout]    |
[INFO] [stdout] 52 |             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout]    |                                                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 52 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 52 +             config_path: config.frck_export_path.clone().and_then(|s| Some(s)),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 52 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 52 +             config_path: config.frck_export_path.clone().and_then(|s| Some(<std::string::String as Into<_>>::into(s))),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::string::String`
[INFO] [stdout]   --> src/firecracker/tokio.rs:51:76
[INFO] [stdout]    |
[INFO] [stdout] 51 |             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout]    |                                                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 51 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 51 +             config_path: config.frck_export_path.clone().and_then(|s| Some(s)),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 51 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 51 +             config_path: config.frck_export_path.clone().and_then(|s| Some(<std::string::String as Into<_>>::into(s))),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&str`
[INFO] [stdout]    --> src/options.rs:205:30
[INFO] [stdout]     |
[INFO] [stdout] 205 |             let path: &str = path.as_ref().into();
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 205 -             let path: &str = path.as_ref().into();
[INFO] [stdout] 205 +             let path: &str = path.as_ref();
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 205 -             let path: &str = path.as_ref().into();
[INFO] [stdout] 205 +             let path: &str = <&str as Into<_>>::into(path.as_ref());
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FirecrackerOption` is never constructed
[INFO] [stdout]  --> src/instance/firecracker.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct FirecrackerOption {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/instance/firecracker.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl FirecrackerOption {
[INFO] [stdout]    | ---------------------- associated function in this implementation
[INFO] [stdout] 69 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `JailerOption` is never constructed
[INFO] [stdout]  --> src/instance/jailer.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct JailerOption {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustcracker` (lib test) due to 3 previous errors; 3 warnings emitted
[INFO] [stdout] error: useless conversion to the same type: `std::string::String`
[INFO] [stdout]   --> src/firecracker/sync.rs:52:76
[INFO] [stdout]    |
[INFO] [stdout] 52 |             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout]    |                                                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 52 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 52 +             config_path: config.frck_export_path.clone().and_then(|s| Some(s)),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 52 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 52 +             config_path: config.frck_export_path.clone().and_then(|s| Some(<std::string::String as Into<_>>::into(s))),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: useless conversion to the same type: `std::string::String`
[INFO] [stdout]   --> src/firecracker/tokio.rs:51:76
[INFO] [stdout]    |
[INFO] [stdout] 51 |             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout]    |                                                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 51 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 51 +             config_path: config.frck_export_path.clone().and_then(|s| Some(s)),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 51 -             config_path: config.frck_export_path.clone().and_then(|s| Some(s.into())),
[INFO] [stdout] 51 +             config_path: config.frck_export_path.clone().and_then(|s| Some(<std::string::String as Into<_>>::into(s))),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `&str`
[INFO] [stdout]    --> src/options.rs:205:30
[INFO] [stdout]     |
[INFO] [stdout] 205 |             let path: &str = path.as_ref().into();
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]     |
[INFO] [stdout] 205 -             let path: &str = path.as_ref().into();
[INFO] [stdout] 205 +             let path: &str = path.as_ref();
[INFO] [stdout]     |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]     |
[INFO] [stdout] 205 -             let path: &str = path.as_ref().into();
[INFO] [stdout] 205 +             let path: &str = <&str as Into<_>>::into(path.as_ref());
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustcracker` (lib) due to 3 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7", kill_on_drop: false }`
[INFO] [stdout] b54c0f1b00a51ff5b653699d82b058e9ee3c3fafcc4c7d55e4c1c5322259e8f7
