[INFO] cloning repository https://github.com/yashwankhade5/rust-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yashwankhade5/rust-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyashwankhade5%2Frust-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyashwankhade5%2Frust-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15b3c7f62d55b6d69c524d02265295eb2e5e1277
[INFO] checking yashwankhade5/rust-challenge against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyashwankhade5%2Frust-challenge" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yashwankhade5/rust-challenge
[INFO] finished tweaking git repo https://github.com/yashwankhade5/rust-challenge
[INFO] tweaked toml for git repo https://github.com/yashwankhade5/rust-challenge written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yashwankhade5/rust-challenge on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yashwankhade5/rust-challenge 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" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb
[INFO] running `Command { std: "docker" "start" "300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb", 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" "300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb", 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" "300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.46
[INFO] [stderr]    Compiling winnow v1.0.3
[INFO] [stderr]    Compiling borsh v1.7.0
[INFO] [stderr]    Compiling syn v2.0.118
[INFO] [stderr]    Compiling toml_parser v1.1.2+spec-1.1.0
[INFO] [stderr]    Compiling toml_edit v0.25.12+spec-1.1.0
[INFO] [stderr]    Compiling proc-macro-crate v3.5.0
[INFO] [stderr]    Compiling borsh-derive v1.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking rust_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:30:41
[INFO] [stdout]    |
[INFO] [stdout] 30 |         borsh::to_vec(data).map_err(|e| e.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] 30 -         borsh::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 30 +         borsh::to_vec(data).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 30 -         borsh::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 30 +         borsh::to_vec(data).map_err(|e| <std::io::Error as Into<_>>::into(e))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:34:46
[INFO] [stdout]    |
[INFO] [stdout] 34 |         borsh::from_slice(bytes).map_err(|e| e.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] 34 -         borsh::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 34 +         borsh::from_slice(bytes).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 34 -         borsh::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 34 +         borsh::from_slice(bytes).map_err(|e| <std::io::Error as Into<_>>::into(e))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `serde_json::Error`
[INFO] [stdout]   --> src/lib.rs:45:46
[INFO] [stdout]    |
[INFO] [stdout] 45 |         serde_json::to_vec(data).map_err(|e| e.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] 45 -         serde_json::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 45 +         serde_json::to_vec(data).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 45 -         serde_json::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 45 +         serde_json::to_vec(data).map_err(|e| <serde_json::Error as Into<_>>::into(e))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `serde_json::Error`
[INFO] [stdout]   --> src/lib.rs:49:51
[INFO] [stdout]    |
[INFO] [stdout] 49 |         serde_json::from_slice(bytes).map_err(|e| e.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] 49 -         serde_json::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 49 +         serde_json::from_slice(bytes).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 49 -         serde_json::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 49 +         serde_json::from_slice(bytes).map_err(|e| <serde_json::Error as Into<_>>::into(e))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:30:41
[INFO] [stdout]    |
[INFO] [stdout] 30 |         borsh::to_vec(data).map_err(|e| e.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] 30 -         borsh::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 30 +         borsh::to_vec(data).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 30 -         borsh::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 30 +         borsh::to_vec(data).map_err(|e| <std::io::Error as Into<_>>::into(e))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `std::io::Error`
[INFO] [stdout]   --> src/lib.rs:34:46
[INFO] [stdout]    |
[INFO] [stdout] 34 |         borsh::from_slice(bytes).map_err(|e| e.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] 34 -         borsh::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 34 +         borsh::from_slice(bytes).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 34 -         borsh::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 34 +         borsh::from_slice(bytes).map_err(|e| <std::io::Error as Into<_>>::into(e))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_challenge` (lib test) due to 4 previous errors
[INFO] [stdout] error: useless conversion to the same type: `serde_json::Error`
[INFO] [stdout]   --> src/lib.rs:45:46
[INFO] [stdout]    |
[INFO] [stdout] 45 |         serde_json::to_vec(data).map_err(|e| e.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] 45 -         serde_json::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 45 +         serde_json::to_vec(data).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 45 -         serde_json::to_vec(data).map_err(|e| e.into())
[INFO] [stdout] 45 +         serde_json::to_vec(data).map_err(|e| <serde_json::Error as Into<_>>::into(e))
[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: `serde_json::Error`
[INFO] [stdout]   --> src/lib.rs:49:51
[INFO] [stdout]    |
[INFO] [stdout] 49 |         serde_json::from_slice(bytes).map_err(|e| e.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] 49 -         serde_json::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 49 +         serde_json::from_slice(bytes).map_err(|e| e)
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 49 -         serde_json::from_slice(bytes).map_err(|e| e.into())
[INFO] [stdout] 49 +         serde_json::from_slice(bytes).map_err(|e| <serde_json::Error as Into<_>>::into(e))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_challenge` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb", kill_on_drop: false }`
[INFO] [stdout] 300f2b0d7e421f172b1aa6c3b7fe8f1b8f9c13c1147810a1ced2fc65ee8291bb
