[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] checking madkous/rpncalc against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmadkous%2Frpncalc" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/madkous/rpncalc on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "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-6/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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", 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] 899d4d4a9683cc4f0d5a180c0a30bf02d164861344918b5aa23b9c1eb8b6256f
[INFO] running `Command { std: "docker" "start" "-a" "899d4d4a9683cc4f0d5a180c0a30bf02d164861344918b5aa23b9c1eb8b6256f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "899d4d4a9683cc4f0d5a180c0a30bf02d164861344918b5aa23b9c1eb8b6256f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "899d4d4a9683cc4f0d5a180c0a30bf02d164861344918b5aa23b9c1eb8b6256f", kill_on_drop: false }`
[INFO] [stdout] 899d4d4a9683cc4f0d5a180c0a30bf02d164861344918b5aa23b9c1eb8b6256f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0568df1da982c4482944b402aad28b0953c1688687fba4486ebd5404d1bd013b
[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" "0568df1da982c4482944b402aad28b0953c1688687fba4486ebd5404d1bd013b", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking 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]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[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: 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]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[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] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking 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] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `Command { std: "docker" "inspect" "0568df1da982c4482944b402aad28b0953c1688687fba4486ebd5404d1bd013b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0568df1da982c4482944b402aad28b0953c1688687fba4486ebd5404d1bd013b", kill_on_drop: false }`
[INFO] [stdout] 0568df1da982c4482944b402aad28b0953c1688687fba4486ebd5404d1bd013b