[INFO] cloning repository https://github.com/openriceworks/rust_grep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/openriceworks/rust_grep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fopenriceworks%2Frust_grep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fopenriceworks%2Frust_grep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 400dde6535de11c95f78930ad7d3e468e5ad35e0
[INFO] checking openriceworks/rust_grep against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fopenriceworks%2Frust_grep" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/openriceworks/rust_grep on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/openriceworks/rust_grep
[INFO] finished tweaking git repo https://github.com/openriceworks/rust_grep
[INFO] tweaked toml for git repo https://github.com/openriceworks/rust_grep written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/openriceworks/rust_grep already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "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] aa50a52918bf571d51a1a8c3b2b1fe877f3b043a7636edbc08ed3834dc3b30bb
[INFO] running `Command { std: "docker" "start" "-a" "aa50a52918bf571d51a1a8c3b2b1fe877f3b043a7636edbc08ed3834dc3b30bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa50a52918bf571d51a1a8c3b2b1fe877f3b043a7636edbc08ed3834dc3b30bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa50a52918bf571d51a1a8c3b2b1fe877f3b043a7636edbc08ed3834dc3b30bb", kill_on_drop: false }`
[INFO] [stdout] aa50a52918bf571d51a1a8c3b2b1fe877f3b043a7636edbc08ed3834dc3b30bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "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] 39899444507fbbe4385d31f373eb66f5fe806976db437882a013ca91dd7ff6bd
[INFO] running `Command { std: "docker" "start" "-a" "39899444507fbbe4385d31f373eb66f5fe806976db437882a013ca91dd7ff6bd", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking getopts v0.2.18
[INFO] [stderr]     Checking grep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:79:27
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Err(f) => {panic!(f.to_string())}
[INFO] [stdout]    |                           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Err(f) => {panic!("{}", f.to_string())}
[INFO] [stdout]    |                           ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Err(f) => {std::panic::panic_any(f.to_string())}
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/main.rs:79:27
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Err(f) => {panic!(f.to_string())}
[INFO] [stdout]    |                           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Err(f) => {panic!("{}", f.to_string())}
[INFO] [stdout]    |                           ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]    |
[INFO] [stdout] 79 |         Err(f) => {std::panic::panic_any(f.to_string())}
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "39899444507fbbe4385d31f373eb66f5fe806976db437882a013ca91dd7ff6bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39899444507fbbe4385d31f373eb66f5fe806976db437882a013ca91dd7ff6bd", kill_on_drop: false }`
[INFO] [stdout] 39899444507fbbe4385d31f373eb66f5fe806976db437882a013ca91dd7ff6bd