[INFO] cloning repository https://github.com/shide1989/rustlings_answers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shide1989/rustlings_answers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshide1989%2Frustlings_answers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshide1989%2Frustlings_answers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f275a583cab053fec671301a1ff8f26f43540ae8
[INFO] checking shide1989/rustlings_answers against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshide1989%2Frustlings_answers" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/shide1989/rustlings_answers
[INFO] finished tweaking git repo https://github.com/shide1989/rustlings_answers
[INFO] tweaked toml for git repo https://github.com/shide1989/rustlings_answers written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/shide1989/rustlings_answers on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e837c1a13ea204f9102bf7c34e5484da93c9ceb5fe0d35dcbcd3ea57062578a
[INFO] running `Command { std: "docker" "start" "-a" "3e837c1a13ea204f9102bf7c34e5484da93c9ceb5fe0d35dcbcd3ea57062578a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e837c1a13ea204f9102bf7c34e5484da93c9ceb5fe0d35dcbcd3ea57062578a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e837c1a13ea204f9102bf7c34e5484da93c9ceb5fe0d35dcbcd3ea57062578a", kill_on_drop: false }`
[INFO] [stdout] 3e837c1a13ea204f9102bf7c34e5484da93c9ceb5fe0d35dcbcd3ea57062578a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a23bff69a1b5e376ca2554c01b8b4d0ce33339004fdca59f2f28360cab494a32
[INFO] running `Command { std: "docker" "start" "-a" "a23bff69a1b5e376ca2554c01b8b4d0ce33339004fdca59f2f28360cab494a32", kill_on_drop: false }`
[INFO] [stderr]     Checking exercises v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::num::ParseIntError`
[INFO] [stdout]   --> exercises/13_error_handling/errors5.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | use std::num::ParseIntError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0428]: the name `main` is defined multiple times
[INFO] [stdout]   --> exercises/19_smart_pointers/rc1.rs:38:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn main() {}
[INFO] [stdout]    | --------- previous definition of the value `main` here
[INFO] [stdout] ...
[INFO] [stdout] 38 | fn main() {
[INFO] [stdout]    | ^^^^^^^^^ `main` redefined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `main` must be defined only once in the value namespace of this module
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0428`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "rc1" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a23bff69a1b5e376ca2554c01b8b4d0ce33339004fdca59f2f28360cab494a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a23bff69a1b5e376ca2554c01b8b4d0ce33339004fdca59f2f28360cab494a32", kill_on_drop: false }`
[INFO] [stdout] a23bff69a1b5e376ca2554c01b8b4d0ce33339004fdca59f2f28360cab494a32