[INFO] cloning repository https://github.com/t-eckert/rpn
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Frpn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3a25f61ae1ea7368929240d5ad199ba9e06ddb8
[INFO] checking t-eckert/rpn against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft-eckert%2Frpn" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/t-eckert/rpn on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-8/source/Cargo.toml
[INFO] crate git repo https://github.com/t-eckert/rpn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 876bed7f575215e2b13017b76604cd69a322254eb922e24c2c9eaa16c9b72317
[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" "876bed7f575215e2b13017b76604cd69a322254eb922e24c2c9eaa16c9b72317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "876bed7f575215e2b13017b76604cd69a322254eb922e24c2c9eaa16c9b72317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "876bed7f575215e2b13017b76604cd69a322254eb922e24c2c9eaa16c9b72317", kill_on_drop: false }`
[INFO] [stdout] 876bed7f575215e2b13017b76604cd69a322254eb922e24c2c9eaa16c9b72317
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] ac6b27a1df27b6f821db05ae668629dcfd8c8a067f9defd76df6e2146a4640ca
[INFO] running `Command { std: "docker" "start" "-a" "ac6b27a1df27b6f821db05ae668629dcfd8c8a067f9defd76df6e2146a4640ca", kill_on_drop: false }`
[INFO] [stderr]     Checking rpn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/evaluator.rs:30:21
[INFO] [stdout]    |
[INFO] [stdout] 23 | /             match instruction {
[INFO] [stdout] 24 | |                 "+" => &self.add(),
[INFO] [stdout] 25 | |                 "-" => &self.subtract(),
[INFO] [stdout] 26 | |                 "*" => &self.multiply(),
[INFO] [stdout] ...  |
[INFO] [stdout] 30 | |                     &self.push(value)
[INFO] [stdout]    | |                     ^^^^^^^^^^^^^^^^^ expected `()`, found `&()`
[INFO] [stdout] 31 | |                 }
[INFO] [stdout] 32 | |             }
[INFO] [stdout]    | |_____________- expected this to be `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider using a semicolon here
[INFO] [stdout]    |
[INFO] [stdout] 32 |             };
[INFO] [stdout]    |              ^
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]    |
[INFO] [stdout] 30 |                     self.push(value)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rpn` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/evaluator.rs:30:21
[INFO] [stdout]    |
[INFO] [stdout] 23 | /             match instruction {
[INFO] [stdout] 24 | |                 "+" => &self.add(),
[INFO] [stdout] 25 | |                 "-" => &self.subtract(),
[INFO] [stdout] 26 | |                 "*" => &self.multiply(),
[INFO] [stdout] ...  |
[INFO] [stdout] 30 | |                     &self.push(value)
[INFO] [stdout]    | |                     ^^^^^^^^^^^^^^^^^ expected `()`, found `&()`
[INFO] [stdout] 31 | |                 }
[INFO] [stdout] 32 | |             }
[INFO] [stdout]    | |_____________- expected this to be `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider using a semicolon here
[INFO] [stdout]    |
[INFO] [stdout] 32 |             };
[INFO] [stdout]    |              ^
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]    |
[INFO] [stdout] 30 |                     self.push(value)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ac6b27a1df27b6f821db05ae668629dcfd8c8a067f9defd76df6e2146a4640ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac6b27a1df27b6f821db05ae668629dcfd8c8a067f9defd76df6e2146a4640ca", kill_on_drop: false }`
[INFO] [stdout] ac6b27a1df27b6f821db05ae668629dcfd8c8a067f9defd76df6e2146a4640ca