[INFO] fetching crate hex-utilities 0.1.5...
[INFO] checking hex-utilities-0.1.5 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate hex-utilities 0.1.5 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate hex-utilities 0.1.5
[INFO] finished tweaking crates.io crate hex-utilities 0.1.5
[INFO] tweaked toml for crates.io crate hex-utilities 0.1.5 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate hex-utilities 0.1.5 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded binary-utils v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e16dfaff4f40c1c9e9eae2bbf1e9c21b06bda34ac3bc8351424c2a93c3c2155b
[INFO] running `Command { std: "docker" "start" "-a" "e16dfaff4f40c1c9e9eae2bbf1e9c21b06bda34ac3bc8351424c2a93c3c2155b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e16dfaff4f40c1c9e9eae2bbf1e9c21b06bda34ac3bc8351424c2a93c3c2155b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e16dfaff4f40c1c9e9eae2bbf1e9c21b06bda34ac3bc8351424c2a93c3c2155b", kill_on_drop: false }`
[INFO] [stdout] e16dfaff4f40c1c9e9eae2bbf1e9c21b06bda34ac3bc8351424c2a93c3c2155b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9311347c3b7ebb591ad9bc60df994f0651a099e564537602ae1f722ac35e874
[INFO] running `Command { std: "docker" "start" "-a" "b9311347c3b7ebb591ad9bc60df994f0651a099e564537602ae1f722ac35e874", kill_on_drop: false }`
[INFO] [stderr]     Checking binary-utils v0.1.1
[INFO] [stderr]     Checking hex-utilities v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `binary`
[INFO] [stdout]    --> src/lib.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 |     let binary = get_binary_string_for_byte_array(&wif_bytes.to_vec());
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_binary`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:168:13
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let mut b = String::new();
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let mut b = String::new();
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `decoded`
[INFO] [stdout]    --> src/lib.rs:215:13
[INFO] [stdout]     |
[INFO] [stdout] 215 |         let decoded = decode_hex(hex);
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_decoded`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         Int(ParseIntError),
[INFO] [stdout]    |         --- ^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 50 -         Int(ParseIntError),
[INFO] [stdout] 50 +         Int(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |         Unicode(u32),
[INFO] [stdout]    |         ------- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 51 -         Unicode(u32),
[INFO] [stdout] 51 +         Unicode(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `binary`
[INFO] [stdout]    --> src/lib.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 |     let binary = get_binary_string_for_byte_array(&wif_bytes.to_vec());
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_binary`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:168:13
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let mut b = String::new();
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let mut b = String::new();
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         Int(ParseIntError),
[INFO] [stdout]    |         --- ^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 50 -         Int(ParseIntError),
[INFO] [stdout] 50 +         Int(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/lib.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |         Unicode(u32),
[INFO] [stdout]    |         ------- ^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 51 -         Unicode(u32),
[INFO] [stdout] 51 +         Unicode(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "b9311347c3b7ebb591ad9bc60df994f0651a099e564537602ae1f722ac35e874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9311347c3b7ebb591ad9bc60df994f0651a099e564537602ae1f722ac35e874", kill_on_drop: false }`
[INFO] [stdout] b9311347c3b7ebb591ad9bc60df994f0651a099e564537602ae1f722ac35e874