[INFO] cloning repository https://github.com/oscanezing/classes_v0
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/oscanezing/classes_v0" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foscanezing%2Fclasses_v0", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foscanezing%2Fclasses_v0'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7681b239ee3643ad1dda1da203d9bd3238003d1e
[INFO] checking oscanezing/classes_v0 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Foscanezing%2Fclasses_v0" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/oscanezing/classes_v0
[INFO] finished tweaking git repo https://github.com/oscanezing/classes_v0
[INFO] tweaked toml for git repo https://github.com/oscanezing/classes_v0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/oscanezing/classes_v0 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/oscanezing/classes_v0 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3754f1d1059fb2a928f88c8aa320d9d4980c0473040d8aa4b27e3d33502aa60d
[INFO] running `Command { std: "docker" "start" "-a" "3754f1d1059fb2a928f88c8aa320d9d4980c0473040d8aa4b27e3d33502aa60d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3754f1d1059fb2a928f88c8aa320d9d4980c0473040d8aa4b27e3d33502aa60d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3754f1d1059fb2a928f88c8aa320d9d4980c0473040d8aa4b27e3d33502aa60d", kill_on_drop: false }`
[INFO] [stdout] 3754f1d1059fb2a928f88c8aa320d9d4980c0473040d8aa4b27e3d33502aa60d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90f9a302e3fa9da3c144f75dfb5233389cd56502c4b46d10f564c19843b4ec8f
[INFO] running `Command { std: "docker" "start" "-a" "90f9a302e3fa9da3c144f75dfb5233389cd56502c4b46d10f564c19843b4ec8f", kill_on_drop: false }`
[INFO] [stderr]     Checking classes_v0 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/main.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub struct Student {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 67 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Student` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `professor` are never read
[INFO] [stdout]    --> src/main.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub struct Class<'a, T> {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 165 |     name: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 166 |     professor: String,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Class` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/main.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub struct Student {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 67 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Student` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `professor` are never read
[INFO] [stdout]    --> src/main.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 164 | pub struct Class<'a, T> {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 165 |     name: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 166 |     professor: String,
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Class` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "90f9a302e3fa9da3c144f75dfb5233389cd56502c4b46d10f564c19843b4ec8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90f9a302e3fa9da3c144f75dfb5233389cd56502c4b46d10f564c19843b4ec8f", kill_on_drop: false }`
[INFO] [stdout] 90f9a302e3fa9da3c144f75dfb5233389cd56502c4b46d10f564c19843b4ec8f