[INFO] cloning repository https://github.com/MrWiseCoder/rust_fileio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MrWiseCoder/rust_fileio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMrWiseCoder%2Frust_fileio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMrWiseCoder%2Frust_fileio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 02813e450c12a005eb76e527ce5a71368c4dc483
[INFO] checking MrWiseCoder/rust_fileio/02813e450c12a005eb76e527ce5a71368c4dc483 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMrWiseCoder%2Frust_fileio" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MrWiseCoder/rust_fileio on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MrWiseCoder/rust_fileio
[INFO] finished tweaking git repo https://github.com/MrWiseCoder/rust_fileio
[INFO] tweaked toml for git repo https://github.com/MrWiseCoder/rust_fileio written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MrWiseCoder/rust_fileio 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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2a52b1adc2b8f62f6e1585a9f3f759ef305fedd11159f693140bf3df1aec958
[INFO] running `Command { std: "docker" "start" "-a" "b2a52b1adc2b8f62f6e1585a9f3f759ef305fedd11159f693140bf3df1aec958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2a52b1adc2b8f62f6e1585a9f3f759ef305fedd11159f693140bf3df1aec958", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2a52b1adc2b8f62f6e1585a9f3f759ef305fedd11159f693140bf3df1aec958", kill_on_drop: false }`
[INFO] [stdout] b2a52b1adc2b8f62f6e1585a9f3f759ef305fedd11159f693140bf3df1aec958
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4cf2cc38bf65a9083a940d1c887d0288a4adb89f369a15df5501e93e8779bce
[INFO] running `Command { std: "docker" "start" "-a" "c4cf2cc38bf65a9083a940d1c887d0288a4adb89f369a15df5501e93e8779bce", kill_on_drop: false }`
[INFO] [stderr]     Checking prj1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected one of `!` or `::`, found keyword `fn`
[INFO] [stdout]  --> src/main.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     public fn write_to_a_file(file_path: String, buf: String) -> std::io::Result<()>  {
[INFO] [stdout]   |            ^^ expected one of `!` or `::`
[INFO] [stdout]   |
[INFO] [stdout] help: write `pub` instead of `public` to make the item public
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn write_to_a_file(file_path: String, buf: String) -> std::io::Result<()>  {
[INFO] [stdout]   |     ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected one of `!` or `::`, found keyword `fn`
[INFO] [stdout]  --> src/main.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     public fn write_to_a_file(file_path: String, buf: String) -> std::io::Result<()>  {
[INFO] [stdout]   |            ^^ expected one of `!` or `::`
[INFO] [stdout]   |
[INFO] [stdout] help: write `pub` instead of `public` to make the item public
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn write_to_a_file(file_path: String, buf: String) -> std::io::Result<()>  {
[INFO] [stdout]   |     ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `prj1` (bin "prj1") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `prj1` (bin "prj1" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c4cf2cc38bf65a9083a940d1c887d0288a4adb89f369a15df5501e93e8779bce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4cf2cc38bf65a9083a940d1c887d0288a4adb89f369a15df5501e93e8779bce", kill_on_drop: false }`
[INFO] [stdout] c4cf2cc38bf65a9083a940d1c887d0288a4adb89f369a15df5501e93e8779bce