[INFO] cloning repository https://github.com/t-eckert/rpn
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/t-eckert/rpn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Frpn"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Frpn'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 979a2c3b0dec36a16f6e9926f6296f2b4bdd057a
[INFO] checking t-eckert/rpn against master#d939f708d960161d23b964309ba68ff207fc0ead for pr-70087
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Frpn" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/t-eckert/rpn on toolchain d939f708d960161d23b964309ba68ff207fc0ead
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/t-eckert/rpn
[INFO] finished tweaking git repo https://github.com/t-eckert/rpn
[INFO] tweaked toml for git repo https://github.com/t-eckert/rpn written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/t-eckert/rpn already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "/opt/rustwide/cargo-home/bin/cargo" "+d939f708d960161d23b964309ba68ff207fc0ead" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1dc2b7543229089eeb6faa7bf9542a6e93b9804635cdb40f96e2118125aa6ebb
[INFO] running `"docker" "start" "-a" "1dc2b7543229089eeb6faa7bf9542a6e93b9804635cdb40f96e2118125aa6ebb"`
[INFO] [stderr]     Checking rpn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `instructions`
[INFO] [stderr]   --> src/evaluator.rs:11:27
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn evaluate(mut self, instructions: &str) -> f32 {
[INFO] [stderr]    |                           ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_instructions`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/evaluator.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn evaluate(mut self, instructions: &str) -> f32 {
[INFO] [stderr]    |                 ----^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Evaluator`
[INFO] [stderr]  --> src/evaluator.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Evaluator {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/evaluator.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     fn new() -> Evaluator {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `evaluate`
[INFO] [stderr]   --> src/evaluator.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn evaluate(mut self, instructions: &str) -> f32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0282]: type annotations needed for `std::vec::Vec<T>`
[INFO] [stderr]   --> src/evaluator.rs:34:24
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let expected = vec![];
[INFO] [stderr]    |             --------   ^^^^^^ cannot infer type for type parameter `T`
[INFO] [stderr]    |             |
[INFO] [stderr]    |             consider giving `expected` the explicit type `std::vec::Vec<T>`, where the type parameter `T` is specified
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0282`.
[INFO] [stderr] error: could not compile `rpn`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1dc2b7543229089eeb6faa7bf9542a6e93b9804635cdb40f96e2118125aa6ebb"`
[INFO] running `"docker" "rm" "-f" "1dc2b7543229089eeb6faa7bf9542a6e93b9804635cdb40f96e2118125aa6ebb"`
[INFO] [stdout] 1dc2b7543229089eeb6faa7bf9542a6e93b9804635cdb40f96e2118125aa6ebb