[INFO] cloning repository https://github.com/saisoma123/RPNEvaluator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/saisoma123/RPNEvaluator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaisoma123%2FRPNEvaluator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaisoma123%2FRPNEvaluator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 97d36b3c8a7bd9b3690ea1d687b3a1110ffec0b1
[INFO] checking saisoma123/RPNEvaluator against try#654bc80249a2b2ba8bd16392b5829d87ed96c92d for pr-136458
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaisoma123%2FRPNEvaluator" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/saisoma123/RPNEvaluator on toolchain 654bc80249a2b2ba8bd16392b5829d87ed96c92d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/saisoma123/RPNEvaluator
[INFO] finished tweaking git repo https://github.com/saisoma123/RPNEvaluator
[INFO] tweaked toml for git repo https://github.com/saisoma123/RPNEvaluator written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/saisoma123/RPNEvaluator 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" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0f3390a2bcc0b46b10017770dcf11f452a6802e6bae96fef5410fa95260a2a6
[INFO] running `Command { std: "docker" "start" "-a" "e0f3390a2bcc0b46b10017770dcf11f452a6802e6bae96fef5410fa95260a2a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0f3390a2bcc0b46b10017770dcf11f452a6802e6bae96fef5410fa95260a2a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0f3390a2bcc0b46b10017770dcf11f452a6802e6bae96fef5410fa95260a2a6", kill_on_drop: false }`
[INFO] [stdout] e0f3390a2bcc0b46b10017770dcf11f452a6802e6bae96fef5410fa95260a2a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+654bc80249a2b2ba8bd16392b5829d87ed96c92d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6956a9ed8fd12760189033ac0e213ba71c2dd64611c1588305630c9d263c47af
[INFO] running `Command { std: "docker" "start" "-a" "6956a9ed8fd12760189033ac0e213ba71c2dd64611c1588305630c9d263c47af", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking pa3 v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `vs`
[INFO] [stdout]   --> src/exercise1.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn sum(vs: &Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_vs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vs`
[INFO] [stdout]   --> src/exercise1.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn dedup(vs: &Vec<i32>) -> Vec<i32> {
[INFO] [stdout]    |              ^^ help: if this is intentional, prefix it with an underscore: `_vs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vs`
[INFO] [stdout]   --> src/exercise1.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn filter(vs: &Vec<i32>, pred: &dyn Fn(i32) -> bool) -> Vec<i32> {
[INFO] [stdout]    |               ^^ help: if this is intentional, prefix it with an underscore: `_vs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pred`
[INFO] [stdout]   --> src/exercise1.rs:27:30
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn filter(vs: &Vec<i32>, pred: &dyn Fn(i32) -> bool) -> Vec<i32> {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_pred`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat1`
[INFO] [stdout]   --> src/exercise2.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn mat_mult(mat1: &Matrix, mat2: &Matrix) -> Matrix {
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_mat1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat2`
[INFO] [stdout]   --> src/exercise2.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn mat_mult(mat1: &Matrix, mat2: &Matrix) -> Matrix {
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_mat2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/exercise3.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn sieve(n: u32) -> Vec<u32> {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_discs`
[INFO] [stdout]   --> src/exercise4.rs:37:14
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_discs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src`
[INFO] [stdout]   --> src/exercise4.rs:37:30
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_src`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aux`
[INFO] [stdout]   --> src/exercise4.rs:37:40
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |                                        ^^^ help: if this is intentional, prefix it with an underscore: `_aux`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dst`
[INFO] [stdout]   --> src/exercise4.rs:37:50
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |                                                  ^^^ help: if this is intentional, prefix it with an underscore: `_dst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vs`
[INFO] [stdout]   --> src/exercise1.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn sum(vs: &Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^ help: if this is intentional, prefix it with an underscore: `_vs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vs`
[INFO] [stdout]   --> src/exercise1.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn dedup(vs: &Vec<i32>) -> Vec<i32> {
[INFO] [stdout]    |              ^^ help: if this is intentional, prefix it with an underscore: `_vs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vs`
[INFO] [stdout]   --> src/exercise1.rs:27:15
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn filter(vs: &Vec<i32>, pred: &dyn Fn(i32) -> bool) -> Vec<i32> {
[INFO] [stdout]    |               ^^ help: if this is intentional, prefix it with an underscore: `_vs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pred`
[INFO] [stdout]   --> src/exercise1.rs:27:30
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn filter(vs: &Vec<i32>, pred: &dyn Fn(i32) -> bool) -> Vec<i32> {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_pred`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat1`
[INFO] [stdout]   --> src/exercise2.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn mat_mult(mat1: &Matrix, mat2: &Matrix) -> Matrix {
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_mat1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat2`
[INFO] [stdout]   --> src/exercise2.rs:29:32
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn mat_mult(mat1: &Matrix, mat2: &Matrix) -> Matrix {
[INFO] [stdout]    |                                ^^^^ help: if this is intentional, prefix it with an underscore: `_mat2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/exercise3.rs:15:14
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn sieve(n: u32) -> Vec<u32> {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_discs`
[INFO] [stdout]   --> src/exercise4.rs:37:14
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_discs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `src`
[INFO] [stdout]   --> src/exercise4.rs:37:30
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_src`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `aux`
[INFO] [stdout]   --> src/exercise4.rs:37:40
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |                                        ^^^ help: if this is intentional, prefix it with an underscore: `_aux`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dst`
[INFO] [stdout]   --> src/exercise4.rs:37:50
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn hanoi(num_discs: u32, src: Peg, aux: Peg, dst: Peg) -> Vec<Move> {
[INFO] [stdout]    |                                                  ^^^ help: if this is intentional, prefix it with an underscore: `_dst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "6956a9ed8fd12760189033ac0e213ba71c2dd64611c1588305630c9d263c47af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6956a9ed8fd12760189033ac0e213ba71c2dd64611c1588305630c9d263c47af", kill_on_drop: false }`
[INFO] [stdout] 6956a9ed8fd12760189033ac0e213ba71c2dd64611c1588305630c9d263c47af