[INFO] cloning repository https://github.com/kawogi/vokabill
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kawogi/vokabill" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkawogi%2Fvokabill", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkawogi%2Fvokabill'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 27b7dc7d3e0fc1396ba639d65cba7713334680e6
[INFO] checking kawogi/vokabill against try#5e7498e6740d105521420ac0ab146e2c7a21596d for pr-138363
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkawogi%2Fvokabill" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kawogi/vokabill on toolchain 5e7498e6740d105521420ac0ab146e2c7a21596d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kawogi/vokabill
[INFO] finished tweaking git repo https://github.com/kawogi/vokabill
[INFO] tweaked toml for git repo https://github.com/kawogi/vokabill written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/kawogi/vokabill 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" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6814212ef550440a92f0aec38e317bd291e9d944d862bc32dfdfe41b800b2f73
[INFO] running `Command { std: "docker" "start" "-a" "6814212ef550440a92f0aec38e317bd291e9d944d862bc32dfdfe41b800b2f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6814212ef550440a92f0aec38e317bd291e9d944d862bc32dfdfe41b800b2f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6814212ef550440a92f0aec38e317bd291e9d944d862bc32dfdfe41b800b2f73", kill_on_drop: false }`
[INFO] [stdout] 6814212ef550440a92f0aec38e317bd291e9d944d862bc32dfdfe41b800b2f73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9171ab6ac27c88e8f7982446671417493103a4e59cc73a388e29ec595f35e38
[INFO] running `Command { std: "docker" "start" "-a" "c9171ab6ac27c88e8f7982446671417493103a4e59cc73a388e29ec595f35e38", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling serde v1.0.144
[INFO] [stderr]    Compiling serde_derive v1.0.144
[INFO] [stderr]    Compiling serde_json v1.0.85
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking itoa v1.0.3
[INFO] [stderr]     Checking ryu v1.0.11
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking vokabill v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]    --> src/main.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let mut rng = thread_rng();
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let mut rng = thread_rng();
[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: method `add` is never used
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Vocabulary {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 34 |
[INFO] [stdout] 35 |     fn add(&mut self, b: impl ToString, a: impl ToString) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]    --> src/main.rs:204:17
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let mut rng = thread_rng();
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_simple` is never used
[INFO] [stdout]    --> src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 194 | impl Variant {
[INFO] [stdout]     | ------------ associated function in this implementation
[INFO] [stdout] 195 |
[INFO] [stdout] 196 |     fn new_simple(a: impl ToString, b: impl ToString) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let mut rng = thread_rng();
[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: method `add` is never used
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Vocabulary {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 34 |
[INFO] [stdout] 35 |     fn add(&mut self, b: impl ToString, a: impl ToString) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_simple` is never used
[INFO] [stdout]    --> src/main.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 194 | impl Variant {
[INFO] [stdout]     | ------------ associated function in this implementation
[INFO] [stdout] 195 |
[INFO] [stdout] 196 |     fn new_simple(a: impl ToString, b: impl ToString) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.93s
[INFO] running `Command { std: "docker" "inspect" "c9171ab6ac27c88e8f7982446671417493103a4e59cc73a388e29ec595f35e38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9171ab6ac27c88e8f7982446671417493103a4e59cc73a388e29ec595f35e38", kill_on_drop: false }`
[INFO] [stdout] c9171ab6ac27c88e8f7982446671417493103a4e59cc73a388e29ec595f35e38