[INFO] cloning repository https://github.com/kirillt/coins-change
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kirillt/coins-change" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fcoins-change", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fcoins-change'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f9eebe8c42c719f037321c1c1ff3856641f1bfa9
[INFO] checking kirillt/coins-change against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkirillt%2Fcoins-change" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kirillt/coins-change on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kirillt/coins-change
[INFO] finished tweaking git repo https://github.com/kirillt/coins-change
[INFO] tweaked toml for git repo https://github.com/kirillt/coins-change written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/kirillt/coins-change already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f786a3401621113ebbe85fd91ac4b8773bcd35c1b67923b0515e10028de43500
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f786a3401621113ebbe85fd91ac4b8773bcd35c1b67923b0515e10028de43500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f786a3401621113ebbe85fd91ac4b8773bcd35c1b67923b0515e10028de43500", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f786a3401621113ebbe85fd91ac4b8773bcd35c1b67923b0515e10028de43500", kill_on_drop: false }`
[INFO] [stdout] f786a3401621113ebbe85fd91ac4b8773bcd35c1b67923b0515e10028de43500
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a13afc5063284fefb372ca3b1c78a9b436f33f185dfab651ee989d363ba72cd3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a13afc5063284fefb372ca3b1c78a9b436f33f185dfab651ee989d363ba72cd3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking ryu v1.0.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking memchr v2.3.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling rayon v1.3.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking clap v2.33.2
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking rayon-core v1.7.1
[INFO] [stderr]     Checking tinyset v0.4.4
[INFO] [stderr]     Checking coins-change v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `amount`
[INFO] [stdout]  --> src/optimal_change.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn calculate(amount: usize, coins: &Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]   |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_amount`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]  --> src/optimal_change.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn calculate(amount: usize, coins: &Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]   |                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stdout] warning: unused variable: `amount`
[INFO] [stdout]  --> src/optimal_change.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn calculate(amount: usize, coins: &Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]   |                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_amount`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]  --> src/optimal_change.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn calculate(amount: usize, coins: &Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]   |                                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.47s
[INFO] running `Command { std: "docker" "inspect" "a13afc5063284fefb372ca3b1c78a9b436f33f185dfab651ee989d363ba72cd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a13afc5063284fefb372ca3b1c78a9b436f33f185dfab651ee989d363ba72cd3", kill_on_drop: false }`
[INFO] [stdout] a13afc5063284fefb372ca3b1c78a9b436f33f185dfab651ee989d363ba72cd3