[INFO] fetching crate argser 0.2.3...
[INFO] checking argser-0.2.3 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate argser 0.2.3 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate argser 0.2.3
[INFO] finished tweaking crates.io crate argser 0.2.3
[INFO] tweaked toml for crates.io crate argser 0.2.3 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate argser 0.2.3 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate argser 0.2.3 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argser-macros v0.2.2
[INFO] [stderr]   Downloaded syn v1.0.75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e867a0c251cc31ec3f89b7c3f58f4450fb3f6d6621d79e5cb2a4e2fc5d7f9531
[INFO] running `Command { std: "docker" "start" "-a" "e867a0c251cc31ec3f89b7c3f58f4450fb3f6d6621d79e5cb2a4e2fc5d7f9531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e867a0c251cc31ec3f89b7c3f58f4450fb3f6d6621d79e5cb2a4e2fc5d7f9531", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e867a0c251cc31ec3f89b7c3f58f4450fb3f6d6621d79e5cb2a4e2fc5d7f9531", kill_on_drop: false }`
[INFO] [stdout] e867a0c251cc31ec3f89b7c3f58f4450fb3f6d6621d79e5cb2a4e2fc5d7f9531
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6df8568ac9a018e67ed492cbc1a5279ee1a1b937efd272d2bd7e4a6b651d15bd
[INFO] running `Command { std: "docker" "start" "-a" "6df8568ac9a018e67ed492cbc1a5279ee1a1b937efd272d2bd7e4a6b651d15bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling argser-macros v0.2.2
[INFO] [stderr]     Checking argser v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `other` is never read
[INFO] [stdout]   --> examples/simple_ci.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct SubCategory {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 20 |     other: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SubCategory` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.93s
[INFO] running `Command { std: "docker" "inspect" "6df8568ac9a018e67ed492cbc1a5279ee1a1b937efd272d2bd7e4a6b651d15bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6df8568ac9a018e67ed492cbc1a5279ee1a1b937efd272d2bd7e4a6b651d15bd", kill_on_drop: false }`
[INFO] [stdout] 6df8568ac9a018e67ed492cbc1a5279ee1a1b937efd272d2bd7e4a6b651d15bd