[INFO] cloning repository https://github.com/rust-cc/rc_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-cc/rc_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-cc%2Frc_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-cc%2Frc_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9132cc0bfdd805272a556434cb545815dfe4e6b4
[INFO] checking rust-cc/rc_demo against try#5e7498e6740d105521420ac0ab146e2c7a21596d for pr-138363
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-cc%2Frc_demo" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rust-cc/rc_demo on toolchain 5e7498e6740d105521420ac0ab146e2c7a21596d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rust-cc/rc_demo
[INFO] finished tweaking git repo https://github.com/rust-cc/rc_demo
[INFO] tweaked toml for git repo https://github.com/rust-cc/rc_demo written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-cc/rc_demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a51b97b3c66f50b3f3e56fb0d3156b0f4f71bf512d0237639b2da1dfd81b2a3c
[INFO] running `Command { std: "docker" "start" "-a" "a51b97b3c66f50b3f3e56fb0d3156b0f4f71bf512d0237639b2da1dfd81b2a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a51b97b3c66f50b3f3e56fb0d3156b0f4f71bf512d0237639b2da1dfd81b2a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a51b97b3c66f50b3f3e56fb0d3156b0f4f71bf512d0237639b2da1dfd81b2a3c", kill_on_drop: false }`
[INFO] [stdout] a51b97b3c66f50b3f3e56fb0d3156b0f4f71bf512d0237639b2da1dfd81b2a3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5e7498e6740d105521420ac0ab146e2c7a21596d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 833aa90d8eab08f4bdabefd012a4c69ed3f96929b531fc45d690d6db749c8e1c
[INFO] running `Command { std: "docker" "start" "-a" "833aa90d8eab08f4bdabefd012a4c69ed3f96929b531fc45d690d6db749c8e1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking ecc_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `add_inverse` is never used
[INFO] [stdout]    --> src/curve.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub trait Inverse {
[INFO] [stdout]     |           ------- method in this trait
[INFO] [stdout] 101 |     fn add_inverse(&self) -> Self;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_inverse` is never used
[INFO] [stdout]    --> src/curve.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub trait Inverse {
[INFO] [stdout]     |           ------- method in this trait
[INFO] [stdout] 101 |     fn add_inverse(&self) -> Self;
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.56s
[INFO] running `Command { std: "docker" "inspect" "833aa90d8eab08f4bdabefd012a4c69ed3f96929b531fc45d690d6db749c8e1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "833aa90d8eab08f4bdabefd012a4c69ed3f96929b531fc45d690d6db749c8e1c", kill_on_drop: false }`
[INFO] [stdout] 833aa90d8eab08f4bdabefd012a4c69ed3f96929b531fc45d690d6db749c8e1c