[INFO] cloning repository https://github.com/suzumi/grep
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/suzumi/grep" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuzumi%2Fgrep", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuzumi%2Fgrep'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb02fc09ed1783601e946e537445f2136d1739ce
[INFO] testing suzumi/grep against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuzumi%2Fgrep" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/suzumi/grep on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/suzumi/grep
[INFO] finished tweaking git repo https://github.com/suzumi/grep
[INFO] tweaked toml for git repo https://github.com/suzumi/grep written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/suzumi/grep already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.17
[INFO] [stderr]   Downloaded regex-syntax v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28c81dd5dd7816e7bc6278e5592475a2892f63f3ea8c59d5fde6cf8406662430
[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" "28c81dd5dd7816e7bc6278e5592475a2892f63f3ea8c59d5fde6cf8406662430", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28c81dd5dd7816e7bc6278e5592475a2892f63f3ea8c59d5fde6cf8406662430", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28c81dd5dd7816e7bc6278e5592475a2892f63f3ea8c59d5fde6cf8406662430", kill_on_drop: false }`
[INFO] [stdout] 28c81dd5dd7816e7bc6278e5592475a2892f63f3ea8c59d5fde6cf8406662430
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d96b69e80eb2209c531793cd7f5f4748c66d5eb8106ddc8f7142e70639ed991
[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" "8d96b69e80eb2209c531793cd7f5f4748c66d5eb8106ddc8f7142e70639ed991", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-syntax v0.3.7
[INFO] [stderr]    Compiling regex v0.1.77
[INFO] [stderr]    Compiling grep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/main.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 11 |   try!(file.read_to_string(&mut content));
[INFO] [stdout]    |   ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/main.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 |   let mut file = try!(File::open(filename));
[INFO] [stdout]   |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this function takes 1 argument but 2 arguments were supplied
[INFO] [stdout]    --> src/main.rs:16:12
[INFO] [stdout]     |
[INFO] [stdout] 16  |   let re = Regex::new(r"{}+", pattern).unwrap();
[INFO] [stdout]     |            ^^^^^^^^^^ ------  ------- supplied 2 arguments
[INFO] [stdout]     |            |
[INFO] [stdout]     |            expected 1 argument
[INFO] [stdout]     |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-0.1.77/src/re_unicode.rs:163:12
[INFO] [stdout]     |
[INFO] [stdout] 163 |     pub fn new(re: &str) -> Result<Regex, Error> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |   let caps = re.captures(content).unwrap();
[INFO] [stdout]    |                          ^^^^^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          expected `&str`, found struct `String`
[INFO] [stdout]    |                          help: consider borrowing here: `&content`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `()` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> src/main.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 26 |       println!("{}", match read_file(args[2].clone()) {
[INFO] [stdout]    |  ____________________^
[INFO] [stdout] 27 | |         Ok(content) => {
[INFO] [stdout] 28 | |           extract_pattern(args[1], content)
[INFO] [stdout] 29 | |         },
[INFO] [stdout] 30 | |         Err(reason) => panic!("{}", reason)
[INFO] [stdout] 31 | |     });
[INFO] [stdout]    | |_____^ `()` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::fmt::Display` is not implemented for `()`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0061, E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `grep` due to 4 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "8d96b69e80eb2209c531793cd7f5f4748c66d5eb8106ddc8f7142e70639ed991", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d96b69e80eb2209c531793cd7f5f4748c66d5eb8106ddc8f7142e70639ed991", kill_on_drop: false }`
[INFO] [stdout] 8d96b69e80eb2209c531793cd7f5f4748c66d5eb8106ddc8f7142e70639ed991
