[INFO] cloning repository https://github.com/hmc-memsafe-2016f/wk2-starter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hmc-memsafe-2016f/wk2-starter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhmc-memsafe-2016f%2Fwk2-starter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhmc-memsafe-2016f%2Fwk2-starter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dde90e4a050fbfb2d74e08d7736e20dc87045162
[INFO] checking hmc-memsafe-2016f/wk2-starter against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhmc-memsafe-2016f%2Fwk2-starter" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hmc-memsafe-2016f/wk2-starter on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hmc-memsafe-2016f/wk2-starter
[INFO] finished tweaking git repo https://github.com/hmc-memsafe-2016f/wk2-starter
[INFO] tweaked toml for git repo https://github.com/hmc-memsafe-2016f/wk2-starter written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/hmc-memsafe-2016f/wk2-starter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85be659ebadac7ca77bfc83ca7e18ba3b1b621e1ef393e3ed16298cd01c51fc5
[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" "85be659ebadac7ca77bfc83ca7e18ba3b1b621e1ef393e3ed16298cd01c51fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85be659ebadac7ca77bfc83ca7e18ba3b1b621e1ef393e3ed16298cd01c51fc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85be659ebadac7ca77bfc83ca7e18ba3b1b621e1ef393e3ed16298cd01c51fc5", kill_on_drop: false }`
[INFO] [stdout] 85be659ebadac7ca77bfc83ca7e18ba3b1b621e1ef393e3ed16298cd01c51fc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f2b8318ed26258952dce83e9cb5765fef1422dfb77673366a27fbbb34b97a7c9
[INFO] running `Command { std: "docker" "start" "-a" "f2b8318ed26258952dce83e9cb5765fef1422dfb77673366a27fbbb34b97a7c9", kill_on_drop: false }`
[INFO] [stderr]     Checking nom v1.2.4
[INFO] [stderr]     Checking wk2-starter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum is never used: `Expr`
[INFO] [stdout]  --> src/expr/expr.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Expr {
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `BinOp`
[INFO] [stdout]   --> src/expr/expr.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum BinOp {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evaluate`
[INFO] [stdout]   --> src/expr/expr.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn evaluate(&self) -> isize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `operation_count`
[INFO] [stdout]   --> src/expr/expr.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn operation_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `depth`
[INFO] [stdout]   --> src/expr/expr.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn depth(&self) -> usize {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Expr`
[INFO] [stdout]  --> src/expr/expr.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Expr {
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `BinOp`
[INFO] [stdout]   --> src/expr/expr.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub enum BinOp {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evaluate`
[INFO] [stdout]   --> src/expr/expr.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn evaluate(&self) -> isize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `operation_count`
[INFO] [stdout]   --> src/expr/expr.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn operation_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `depth`
[INFO] [stdout]   --> src/expr/expr.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn depth(&self) -> usize {
[INFO] [stdout]    |            ^^^^^
[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 1.54s
[INFO] running `Command { std: "docker" "inspect" "f2b8318ed26258952dce83e9cb5765fef1422dfb77673366a27fbbb34b97a7c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2b8318ed26258952dce83e9cb5765fef1422dfb77673366a27fbbb34b97a7c9", kill_on_drop: false }`
[INFO] [stdout] f2b8318ed26258952dce83e9cb5765fef1422dfb77673366a27fbbb34b97a7c9