[INFO] cloning repository https://github.com/agarmu/reverse-polish-notation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/agarmu/reverse-polish-notation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagarmu%2Freverse-polish-notation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagarmu%2Freverse-polish-notation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b00a7520f1fc513a539beee394ec04b31843bd42
[INFO] testing agarmu/reverse-polish-notation against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagarmu%2Freverse-polish-notation" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/agarmu/reverse-polish-notation on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/agarmu/reverse-polish-notation
[INFO] finished tweaking git repo https://github.com/agarmu/reverse-polish-notation
[INFO] tweaked toml for git repo https://github.com/agarmu/reverse-polish-notation written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/agarmu/reverse-polish-notation already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 774f009ce4b86bbe88906eaa58e440ffb6d06e7b0f56df732874c4455da64092
[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" "774f009ce4b86bbe88906eaa58e440ffb6d06e7b0f56df732874c4455da64092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "774f009ce4b86bbe88906eaa58e440ffb6d06e7b0f56df732874c4455da64092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "774f009ce4b86bbe88906eaa58e440ffb6d06e7b0f56df732874c4455da64092", kill_on_drop: false }`
[INFO] [stdout] 774f009ce4b86bbe88906eaa58e440ffb6d06e7b0f56df732874c4455da64092
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb837901ea5c5f4d5c9fb8b8a5c3ee86b6a7b0e50363c5057410138b35117a17
[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" "bb837901ea5c5f4d5c9fb8b8a5c3ee86b6a7b0e50363c5057410138b35117a17", kill_on_drop: false }`
[INFO] [stderr]    Compiling polish-notation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `join` found for struct `Map` in the current scope
[INFO] [stdout]   --> src/main.rs:36:18
[INFO] [stdout]    |
[INFO] [stdout] 36 |                 .join(",")
[INFO] [stdout]    |                  ^^^^ method not found in `Map<std::slice::Iter<'_, f64>, [closure@src/main.rs:35:22: 35:39]>`
[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 E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `polish-notation` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "bb837901ea5c5f4d5c9fb8b8a5c3ee86b6a7b0e50363c5057410138b35117a17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb837901ea5c5f4d5c9fb8b8a5c3ee86b6a7b0e50363c5057410138b35117a17", kill_on_drop: false }`
[INFO] [stdout] bb837901ea5c5f4d5c9fb8b8a5c3ee86b6a7b0e50363c5057410138b35117a17