[INFO] cloning repository https://github.com/chavic/bethr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chavic/bethr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchavic%2Fbethr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchavic%2Fbethr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3714c92b364495f89b5d3c4c2abc795d9ace9da
[INFO] checking chavic/bethr against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchavic%2Fbethr" "/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/chavic/bethr 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/chavic/bethr
[INFO] finished tweaking git repo https://github.com/chavic/bethr
[INFO] tweaked toml for git repo https://github.com/chavic/bethr written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/chavic/bethr 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] [stdout] cccbbcaef1c2602984d3abf20cd9edd1091c23e05b0a15285a2816abbb6b8604
[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" "cccbbcaef1c2602984d3abf20cd9edd1091c23e05b0a15285a2816abbb6b8604", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cccbbcaef1c2602984d3abf20cd9edd1091c23e05b0a15285a2816abbb6b8604", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cccbbcaef1c2602984d3abf20cd9edd1091c23e05b0a15285a2816abbb6b8604", kill_on_drop: false }`
[INFO] [stdout] cccbbcaef1c2602984d3abf20cd9edd1091c23e05b0a15285a2816abbb6b8604
[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] 41ca276d654769ef5b2f64bc89a888158ca4191aea6d2e651f36a9f67293281f
[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" "41ca276d654769ef5b2f64bc89a888158ca4191aea6d2e651f36a9f67293281f", kill_on_drop: false }`
[INFO] [stderr]     Checking bethr v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `parameters` is never read
[INFO] [stdout]    --> src/lang/parser/parser.rs:494:13
[INFO] [stdout]     |
[INFO] [stdout] 494 |     let mut parameters: Option<Vec<Identifier>> = None;
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parameters` is never read
[INFO] [stdout]    --> src/lang/parser/parser.rs:494:13
[INFO] [stdout]     |
[INFO] [stdout] 494 |     let mut parameters: Option<Vec<Identifier>> = None;
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_prifix_expression`
[INFO] [stdout]    --> src/lang/parser/tests.rs:146:4
[INFO] [stdout]     |
[INFO] [stdout] 146 | fn test_prifix_expression(statement: &Statement) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "41ca276d654769ef5b2f64bc89a888158ca4191aea6d2e651f36a9f67293281f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41ca276d654769ef5b2f64bc89a888158ca4191aea6d2e651f36a9f67293281f", kill_on_drop: false }`
[INFO] [stdout] 41ca276d654769ef5b2f64bc89a888158ca4191aea6d2e651f36a9f67293281f