[INFO] cloning repository https://github.com/madkous/rpncalc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/madkous/rpncalc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadkous%2Frpncalc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadkous%2Frpncalc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5dd7f461b39a0394720349a52d123c402d33b365
[INFO] testing madkous/rpncalc against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadkous%2Frpncalc" "/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/madkous/rpncalc 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/madkous/rpncalc
[INFO] finished tweaking git repo https://github.com/madkous/rpncalc
[INFO] tweaked toml for git repo https://github.com/madkous/rpncalc written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/madkous/rpncalc 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] [stderr]     Blocking waiting for file lock on package cache
[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" "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] 07e2ed5ebed02ce2f7eecdd382cfcca50c06a0e285f068413899c8cf249d0098
[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" "07e2ed5ebed02ce2f7eecdd382cfcca50c06a0e285f068413899c8cf249d0098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07e2ed5ebed02ce2f7eecdd382cfcca50c06a0e285f068413899c8cf249d0098", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07e2ed5ebed02ce2f7eecdd382cfcca50c06a0e285f068413899c8cf249d0098", kill_on_drop: false }`
[INFO] [stdout] 07e2ed5ebed02ce2f7eecdd382cfcca50c06a0e285f068413899c8cf249d0098
[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" "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] 8f62dbd00ddd92fa555c63428e360617db6457efeac2bc039b1998dd8d60fbcf
[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" "8f62dbd00ddd92fa555c63428e360617db6457efeac2bc039b1998dd8d60fbcf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling stablib v0.1.0 (/opt/rustwide/workdir/lib)
[INFO] [stdout] warning: unused import: `command::*`
[INFO] [stdout]   --> lib/src/stack.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use command::*;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> lib/src/operator.rs:27:14
[INFO] [stdout]    |
[INFO] [stdout] 27 | type Sfunc = (fn(&[Entry]) -> Vec<Entry>);
[INFO] [stdout]    |              ^                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 - type Sfunc = (fn(&[Entry]) -> Vec<Entry>);
[INFO] [stdout] 27 + type Sfunc = fn(&[Entry]) -> Vec<Entry>;
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `runtime::*`
[INFO] [stdout]   --> lib/src/command.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use runtime::*;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling termion v1.5.1
[INFO] [stderr]    Compiling stabacus v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `t_head`
[INFO] [stdout]   --> src/drawer.rs:38:2
[INFO] [stdout]    |
[INFO] [stdout] 38 |     t_head: &'static str, b_head: &'static str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `b_head`
[INFO] [stdout]   --> src/drawer.rs:38:24
[INFO] [stdout]    |
[INFO] [stdout] 38 |     t_head: &'static str, b_head: &'static str,
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this arithmetic operation will overflow
[INFO] [stdout]   --> src/main.rs:74:10
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let y = x - 10;
[INFO] [stdout]    |             ^^^^^^ attempt to compute `5_u16 - 10_u16`, which would overflow
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(arithmetic_overflow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stabacus` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "8f62dbd00ddd92fa555c63428e360617db6457efeac2bc039b1998dd8d60fbcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f62dbd00ddd92fa555c63428e360617db6457efeac2bc039b1998dd8d60fbcf", kill_on_drop: false }`
[INFO] [stdout] 8f62dbd00ddd92fa555c63428e360617db6457efeac2bc039b1998dd8d60fbcf