[INFO] cloning repository https://github.com/danleh/main_error
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danleh/main_error" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanleh%2Fmain_error", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanleh%2Fmain_error'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7fd33c4e5b53a3ffa592045d1c3492fb311bc33f
[INFO] checking danleh/main_error against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanleh%2Fmain_error" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/danleh/main_error
[INFO] finished tweaking git repo https://github.com/danleh/main_error
[INFO] tweaked toml for git repo https://github.com/danleh/main_error written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/danleh/main_error on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e7debcc524607c28a6d8d4a5529c3afbae560572268b97bd0c296f2172284b2f
[INFO] running `Command { std: "docker" "start" "-a" "e7debcc524607c28a6d8d4a5529c3afbae560572268b97bd0c296f2172284b2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e7debcc524607c28a6d8d4a5529c3afbae560572268b97bd0c296f2172284b2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7debcc524607c28a6d8d4a5529c3afbae560572268b97bd0c296f2172284b2f", kill_on_drop: false }`
[INFO] [stdout] e7debcc524607c28a6d8d4a5529c3afbae560572268b97bd0c296f2172284b2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e074ff124789f09772f56a12f8e284296141853085c84b62ea4bb8ebde781f98
[INFO] running `Command { std: "docker" "start" "-a" "e074ff124789f09772f56a12f8e284296141853085c84b62ea4bb8ebde781f98", kill_on_drop: false }`
[INFO] [stderr]     Checking main_error v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::str::from_utf8` with an invalid literal always return an error
[INFO] [stdout]   --> examples/03_multiple_error_types.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let _: &str = std::str::from_utf8(&[159])?;
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^-----^
[INFO] [stdout]    |                                        |
[INFO] [stdout]    |                                        the literal was valid UTF-8 up to the 0 bytes
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(invalid_from_utf8)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "e074ff124789f09772f56a12f8e284296141853085c84b62ea4bb8ebde781f98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e074ff124789f09772f56a12f8e284296141853085c84b62ea4bb8ebde781f98", kill_on_drop: false }`
[INFO] [stdout] e074ff124789f09772f56a12f8e284296141853085c84b62ea4bb8ebde781f98