[INFO] fetching crate plex 0.3.1...
[INFO] checking plex-0.3.1 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate plex 0.3.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate plex 0.3.1 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate plex 0.3.1
[INFO] finished tweaking crates.io crate plex 0.3.1
[INFO] tweaked toml for crates.io crate plex 0.3.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate plex 0.3.1 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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redfa v0.0.3
[INFO] [stderr]   Downloaded lalr v0.0.2
[INFO] [stderr]   Downloaded winnow v0.6.11
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 21cc6c74e2c29f620ae9fec22c64e695e40f225838cd26e86dd539f054283cae
[INFO] running `Command { std: "docker" "start" "-a" "21cc6c74e2c29f620ae9fec22c64e695e40f225838cd26e86dd539f054283cae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21cc6c74e2c29f620ae9fec22c64e695e40f225838cd26e86dd539f054283cae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21cc6c74e2c29f620ae9fec22c64e695e40f225838cd26e86dd539f054283cae", kill_on_drop: false }`
[INFO] [stdout] 21cc6c74e2c29f620ae9fec22c64e695e40f225838cd26e86dd539f054283cae
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd595cb1a3d1f167602397ab1d2c8214f766a68bac7c612acd481f55b04d3e96
[INFO] running `Command { std: "docker" "start" "-a" "fd595cb1a3d1f167602397ab1d2c8214f766a68bac7c612acd481f55b04d3e96", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking winnow v0.6.11
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]    Compiling trybuild v1.0.96
[INFO] [stderr]     Checking lalr v0.0.2
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking termcolor v1.4.1
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking quote v1.0.36
[INFO] [stderr]     Checking redfa v0.0.3
[INFO] [stderr]     Checking syn v2.0.66
[INFO] [stderr]     Checking plex v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking toml_datetime v0.6.6
[INFO] [stderr]     Checking serde_spanned v0.6.6
[INFO] [stderr]     Checking toml_edit v0.22.14
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]     Checking toml v0.8.14
[INFO] [stdout] warning: field `span` is never read
[INFO] [stdout]    --> examples/demo.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |     pub struct Expr {
[INFO] [stdout]     |                ---- field in this struct
[INFO] [stdout] 114 |         pub span: Span,
[INFO] [stdout]     |             ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expr` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.88s
[INFO] running `Command { std: "docker" "inspect" "fd595cb1a3d1f167602397ab1d2c8214f766a68bac7c612acd481f55b04d3e96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd595cb1a3d1f167602397ab1d2c8214f766a68bac7c612acd481f55b04d3e96", kill_on_drop: false }`
[INFO] [stdout] fd595cb1a3d1f167602397ab1d2c8214f766a68bac7c612acd481f55b04d3e96