[INFO] updating cached repository https://github.com/NikitaSmall/rust_rpn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 34a83739d911b80bb25319db4149fbd4084660a3
[INFO] checking NikitaSmall/rust_rpn against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNikitaSmall%2Frust_rpn" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NikitaSmall/rust_rpn on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NikitaSmall/rust_rpn
[INFO] finished tweaking git repo https://github.com/NikitaSmall/rust_rpn
[INFO] tweaked toml for git repo https://github.com/NikitaSmall/rust_rpn written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/NikitaSmall/rust_rpn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5461b8c7de1a47c23854f05b8e39a5a5f8779c15887ac3921d095620cf4f6b05
[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" "5461b8c7de1a47c23854f05b8e39a5a5f8779c15887ac3921d095620cf4f6b05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5461b8c7de1a47c23854f05b8e39a5a5f8779c15887ac3921d095620cf4f6b05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5461b8c7de1a47c23854f05b8e39a5a5f8779c15887ac3921d095620cf4f6b05", kill_on_drop: false }`
[INFO] [stdout] 5461b8c7de1a47c23854f05b8e39a5a5f8779c15887ac3921d095620cf4f6b05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef62590bfc7b2e0dc375f8d50e25e708e04a0526fd1815006cf8f6e87c7c7b03
[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" "ef62590bfc7b2e0dc375f8d50e25e708e04a0526fd1815006cf8f6e87c7c7b03", kill_on_drop: false }`
[INFO] [stderr]     Checking rpn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `raw`
[INFO] [stdout]   --> src/converter.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     raw: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `prededence`
[INFO] [stdout]   --> src/converter.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     prededence: HashMap<Stackable, i8>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `convert`
[INFO] [stdout]   --> src/converter.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn convert(raw: String) -> Converter {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `process`
[INFO] [stdout]   --> src/converter.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn process(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/converter.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut converter = Converter::convert(example_string);
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/converter.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let mut converter = Converter::convert(example_string);
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `Command { std: "docker" "inspect" "ef62590bfc7b2e0dc375f8d50e25e708e04a0526fd1815006cf8f6e87c7c7b03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef62590bfc7b2e0dc375f8d50e25e708e04a0526fd1815006cf8f6e87c7c7b03", kill_on_drop: false }`
[INFO] [stdout] ef62590bfc7b2e0dc375f8d50e25e708e04a0526fd1815006cf8f6e87c7c7b03