[INFO] cloning repository https://github.com/sleibrock/rust-calculus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sleibrock/rust-calculus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsleibrock%2Frust-calculus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsleibrock%2Frust-calculus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f34eb42c2db0f7006f7b9bdca687c231b35e628e
[INFO] checking sleibrock/rust-calculus against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsleibrock%2Frust-calculus" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sleibrock/rust-calculus on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sleibrock/rust-calculus
[INFO] finished tweaking git repo https://github.com/sleibrock/rust-calculus
[INFO] tweaked toml for git repo https://github.com/sleibrock/rust-calculus written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/sleibrock/rust-calculus already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66db2437a09e3187bff14f00605fc926946bdaed8d93625fd281b30d29d509e6
[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" "66db2437a09e3187bff14f00605fc926946bdaed8d93625fd281b30d29d509e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66db2437a09e3187bff14f00605fc926946bdaed8d93625fd281b30d29d509e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66db2437a09e3187bff14f00605fc926946bdaed8d93625fd281b30d29d509e6", kill_on_drop: false }`
[INFO] [stdout] 66db2437a09e3187bff14f00605fc926946bdaed8d93625fd281b30d29d509e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8002b2b87df49e2bb9ce80383113ee8a86dd706d20b594be154ec278387a0fe9
[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" "8002b2b87df49e2bb9ce80383113ee8a86dd706d20b594be154ec278387a0fe9", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking rust-calculus v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `exp2`
[INFO] [stdout]    --> src/derive.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |             let exp2 = unpack(expression);
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_exp2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp3`
[INFO] [stdout]    --> src/derive.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let exp3 = unpack(expression);
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_exp3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/derive.rs:120:27
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 Expr::Var(c) => {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expression`
[INFO] [stdout]    --> src/derive.rs:128:19
[INFO] [stdout]     |
[INFO] [stdout] 128 |         Expr::Cos(ref expression) => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `power2`
[INFO] [stdout]    --> src/derive.rs:139:17
[INFO] [stdout]     |
[INFO] [stdout] 139 |             let power2 = unpack(power);
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_power2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp2`
[INFO] [stdout]    --> src/derive.rs:112:17
[INFO] [stdout]     |
[INFO] [stdout] 112 |             let exp2 = unpack(expression);
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_exp2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp3`
[INFO] [stdout]    --> src/derive.rs:113:17
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let exp3 = unpack(expression);
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_exp3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]    --> src/derive.rs:120:27
[INFO] [stdout]     |
[INFO] [stdout] 120 |                 Expr::Var(c) => {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expression`
[INFO] [stdout]    --> src/derive.rs:128:19
[INFO] [stdout]     |
[INFO] [stdout] 128 |         Expr::Cos(ref expression) => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `power2`
[INFO] [stdout]    --> src/derive.rs:139:17
[INFO] [stdout]     |
[INFO] [stdout] 139 |             let power2 = unpack(power);
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_power2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "8002b2b87df49e2bb9ce80383113ee8a86dd706d20b594be154ec278387a0fe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8002b2b87df49e2bb9ce80383113ee8a86dd706d20b594be154ec278387a0fe9", kill_on_drop: false }`
[INFO] [stdout] 8002b2b87df49e2bb9ce80383113ee8a86dd706d20b594be154ec278387a0fe9