[INFO] cloning repository https://github.com/kprotty/lock_bench
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kprotty/lock_bench" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkprotty%2Flock_bench", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkprotty%2Flock_bench'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68ab4a3f0d19730e693029fde3539949a242464b
[INFO] checking kprotty/lock_bench against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkprotty%2Flock_bench" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kprotty/lock_bench on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kprotty/lock_bench
[INFO] finished tweaking git repo https://github.com/kprotty/lock_bench
[INFO] tweaked toml for git repo https://github.com/kprotty/lock_bench written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/kprotty/lock_bench already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded event-listener v2.4.0
[INFO] [stderr]   Downloaded simple-mutex v1.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c74c967c2debf68c793f7d5e86fb3e36d6a22689170443e0bc57d972f49ca4f
[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" "3c74c967c2debf68c793f7d5e86fb3e36d6a22689170443e0bc57d972f49ca4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c74c967c2debf68c793f7d5e86fb3e36d6a22689170443e0bc57d972f49ca4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c74c967c2debf68c793f7d5e86fb3e36d6a22689170443e0bc57d972f49ca4f", kill_on_drop: false }`
[INFO] [stdout] 3c74c967c2debf68c793f7d5e86fb3e36d6a22689170443e0bc57d972f49ca4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 8209ea1fbe8b0b2bec9810e01f0432e64c4a01f0a1b8495bbfe8f0ac635107b5
[INFO] running `Command { std: "docker" "start" "-a" "8209ea1fbe8b0b2bec9810e01f0432e64c4a01f0a1b8495bbfe8f0ac635107b5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking lock_bench v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking simple-mutex v1.1.5
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stdout] error[E0601]: `main` function not found in crate `args`
[INFO] [stdout]    --> examples/args.rs:8:1
[INFO] [stdout]     |
[INFO] [stdout] 8   | / use std::{env, process};
[INFO] [stdout] 9   | |
[INFO] [stdout] 10  | | #[derive(Copy, Clone)]
[INFO] [stdout] 11  | | pub struct ArgRange {
[INFO] [stdout] ...   |
[INFO] [stdout] 126 | |     result
[INFO] [stdout] 127 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `examples/args.rs`
[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 E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lock_bench`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8209ea1fbe8b0b2bec9810e01f0432e64c4a01f0a1b8495bbfe8f0ac635107b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8209ea1fbe8b0b2bec9810e01f0432e64c4a01f0a1b8495bbfe8f0ac635107b5", kill_on_drop: false }`
[INFO] [stdout] 8209ea1fbe8b0b2bec9810e01f0432e64c4a01f0a1b8495bbfe8f0ac635107b5
