[INFO] fetching crate elm_rusty 0.1.0...
[INFO] checking elm_rusty-0.1.0 against master#db0e836148accac8a22532e3596ac612b63c2d8e for pr-139272
[INFO] extracting crate elm_rusty 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate elm_rusty 0.1.0 on toolchain db0e836148accac8a22532e3596ac612b63c2d8e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate elm_rusty 0.1.0
[INFO] finished tweaking crates.io crate elm_rusty 0.1.0
[INFO] tweaked toml for crates.io crate elm_rusty 0.1.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages to latest compatible versions
[INFO] [stderr]       Adding darling v0.9.0 (available: v0.20.11)
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (available: v1.0.95)
[INFO] [stderr]       Adding quote v0.6.13 (available: v1.0.40)
[INFO] [stderr]       Adding syn v0.15.44 (available: v2.0.101)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "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-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 864cbb9572ac5fe000ee8f297cee8a4c47b35e10c399168500b4de029769b1e4
[INFO] running `Command { std: "docker" "start" "-a" "864cbb9572ac5fe000ee8f297cee8a4c47b35e10c399168500b4de029769b1e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "864cbb9572ac5fe000ee8f297cee8a4c47b35e10c399168500b4de029769b1e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "864cbb9572ac5fe000ee8f297cee8a4c47b35e10c399168500b4de029769b1e4", kill_on_drop: false }`
[INFO] [stdout] 864cbb9572ac5fe000ee8f297cee8a4c47b35e10c399168500b4de029769b1e4
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25615080ac1503caea03d7236448e043ded9ac2690798eea3dc5e3ccf5511653
[INFO] running `Command { std: "docker" "start" "-a" "25615080ac1503caea03d7236448e043ded9ac2690798eea3dc5e3ccf5511653", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking darling_core v0.9.0
[INFO] [stderr]    Compiling darling_macro v0.9.0
[INFO] [stderr]     Checking darling v0.9.0
[INFO] [stderr]     Checking elm_rusty v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `ident` and `attrs` are never read
[INFO] [stdout]   --> src/lib.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct PathArgs {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 26 |     ident: syn::Ident,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     attrs: Vec<syn::Attribute>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PathArgs` 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 `ident` and `attrs` are never read
[INFO] [stdout]   --> src/lib.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct PathArgs {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 26 |     ident: syn::Ident,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 27 |     attrs: Vec<syn::Attribute>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PathArgs` 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 9.41s
[INFO] running `Command { std: "docker" "inspect" "25615080ac1503caea03d7236448e043ded9ac2690798eea3dc5e3ccf5511653", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25615080ac1503caea03d7236448e043ded9ac2690798eea3dc5e3ccf5511653", kill_on_drop: false }`
[INFO] [stdout] 25615080ac1503caea03d7236448e043ded9ac2690798eea3dc5e3ccf5511653