[INFO] cloning repository https://github.com/ShaneM123/grep_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShaneM123/grep_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaneM123%2Fgrep_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaneM123%2Fgrep_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32e3f734196780b283b8ea0334e889cdbb448cbd
[INFO] checking ShaneM123/grep_rust against try#b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f for pr-76104
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShaneM123%2Fgrep_rust" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShaneM123/grep_rust on toolchain b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ShaneM123/grep_rust
[INFO] finished tweaking git repo https://github.com/ShaneM123/grep_rust
[INFO] tweaked toml for git repo https://github.com/ShaneM123/grep_rust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/ShaneM123/grep_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ucd-util v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a9e6b33488d3dc61e1341c35f8fdbeaea63c917c41465b8271df3a3b6127520
[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" "2a9e6b33488d3dc61e1341c35f8fdbeaea63c917c41465b8271df3a3b6127520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a9e6b33488d3dc61e1341c35f8fdbeaea63c917c41465b8271df3a3b6127520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a9e6b33488d3dc61e1341c35f8fdbeaea63c917c41465b8271df3a3b6127520", kill_on_drop: false }`
[INFO] [stdout] 2a9e6b33488d3dc61e1341c35f8fdbeaea63c917c41465b8271df3a3b6127520
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+b1cc2963e8346ba1f5afb1edb86dbcf3f9ef0c5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dedbd72f59cd251ef13ce976cbb14fd728836b78a656e609f3f692b0fbff8d64
[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" "dedbd72f59cd251ef13ce976cbb14fd728836b78a656e609f3f692b0fbff8d64", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rust_grep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: 1 positional argument in format string, but no arguments were given
[INFO] [stdout]   --> src/main.rs:15:33
[INFO] [stdout]    |
[INFO] [stdout] 15 |             Some(_)=> println!("{}, line"),
[INFO] [stdout]    |                                 ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: 1 positional argument in format string, but no arguments were given
[INFO] [stdout]   --> src/main.rs:15:33
[INFO] [stdout]    |
[INFO] [stdout] 15 |             Some(_)=> println!("{}, line"),
[INFO] [stdout]    |                                 ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_grep`
[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] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "dedbd72f59cd251ef13ce976cbb14fd728836b78a656e609f3f692b0fbff8d64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dedbd72f59cd251ef13ce976cbb14fd728836b78a656e609f3f692b0fbff8d64", kill_on_drop: false }`
[INFO] [stdout] dedbd72f59cd251ef13ce976cbb14fd728836b78a656e609f3f692b0fbff8d64