[INFO] cloning repository https://github.com/sxoxgxi/tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sxoxgxi/tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsxoxgxi%2Ftutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsxoxgxi%2Ftutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09785f8cbf66f996d6c41b7e0bdd7667aa79db61
[INFO] testing sxoxgxi/tutorial against try#7af779037716ae4125ceabb429791b4cf5dd0a43 for pr-136932
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsxoxgxi%2Ftutorial" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sxoxgxi/tutorial on toolchain 7af779037716ae4125ceabb429791b4cf5dd0a43
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sxoxgxi/tutorial
[INFO] finished tweaking git repo https://github.com/sxoxgxi/tutorial
[INFO] tweaked toml for git repo https://github.com/sxoxgxi/tutorial written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/sxoxgxi/tutorial 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" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4f8adb9ef50630b7c76a7239ad7d19deeb4aede1f39bd52a0e22110d30e9e78
[INFO] running `Command { std: "docker" "start" "-a" "c4f8adb9ef50630b7c76a7239ad7d19deeb4aede1f39bd52a0e22110d30e9e78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4f8adb9ef50630b7c76a7239ad7d19deeb4aede1f39bd52a0e22110d30e9e78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4f8adb9ef50630b7c76a7239ad7d19deeb4aede1f39bd52a0e22110d30e9e78", kill_on_drop: false }`
[INFO] [stdout] c4f8adb9ef50630b7c76a7239ad7d19deeb4aede1f39bd52a0e22110d30e9e78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 660d9eb9a7e2fbba795fe715a1ba74e9e1d73edef1005360b139d19a2c75d7dc
[INFO] running `Command { std: "docker" "start" "-a" "660d9eb9a7e2fbba795fe715a1ba74e9e1d73edef1005360b139d19a2c75d7dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let z = x + y; 
[INFO] [stdout]    |                 ^ expected `u8`, found `i8`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot add `i8` to `u8`
[INFO] [stdout]   --> src/main.rs:28:15
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let z = x + y; 
[INFO] [stdout]    |               ^ no implementation for `u8 + i8`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Add<i8>` is not implemented for `u8`
[INFO] [stdout]    = help: the following other types implement trait `Add<Rhs>`:
[INFO] [stdout]              `&u8` implements `Add<u8>`
[INFO] [stdout]              `&u8` implements `Add`
[INFO] [stdout]              `u8` implements `Add<&u8>`
[INFO] [stdout]              `u8` implements `Add`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tutorial` (bin "tutorial") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "660d9eb9a7e2fbba795fe715a1ba74e9e1d73edef1005360b139d19a2c75d7dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "660d9eb9a7e2fbba795fe715a1ba74e9e1d73edef1005360b139d19a2c75d7dc", kill_on_drop: false }`
[INFO] [stdout] 660d9eb9a7e2fbba795fe715a1ba74e9e1d73edef1005360b139d19a2c75d7dc