[INFO] fetching crate plex 0.3.1...
[INFO] checking plex-0.3.1 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate plex 0.3.1 into /workspace/builds/worker-0-tc1/source
[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-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate plex 0.3.1 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 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trybuild v1.0.96
[INFO] [stderr]   Downloaded lalr v0.0.2
[INFO] [stderr]   Downloaded redfa v0.0.3
[INFO] [stderr]   Downloaded winnow v0.6.11
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1bdede5df4beda5f2214e0848b574851f293db6263e17059ea304399ba630aba
[INFO] running `Command { std: "docker" "start" "-a" "1bdede5df4beda5f2214e0848b574851f293db6263e17059ea304399ba630aba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1bdede5df4beda5f2214e0848b574851f293db6263e17059ea304399ba630aba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bdede5df4beda5f2214e0848b574851f293db6263e17059ea304399ba630aba", kill_on_drop: false }`
[INFO] [stdout] 1bdede5df4beda5f2214e0848b574851f293db6263e17059ea304399ba630aba
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0a68a42754c7ba09dc2088148c3b8e746116636066ba6bc8c5638dd909fd754
[INFO] running `Command { std: "docker" "start" "-a" "e0a68a42754c7ba09dc2088148c3b8e746116636066ba6bc8c5638dd909fd754", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]     Checking winnow v0.6.11
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking itoa v1.0.11
[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]    Compiling bit-set v0.5.3
[INFO] [stderr]    Compiling redfa v0.0.3
[INFO] [stderr]     Checking quote v1.0.36
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]     Checking plex v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_spanned v0.6.6
[INFO] [stderr]     Checking toml_datetime 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.49s
[INFO] running `Command { std: "docker" "inspect" "e0a68a42754c7ba09dc2088148c3b8e746116636066ba6bc8c5638dd909fd754", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0a68a42754c7ba09dc2088148c3b8e746116636066ba6bc8c5638dd909fd754", kill_on_drop: false }`
[INFO] [stdout] e0a68a42754c7ba09dc2088148c3b8e746116636066ba6bc8c5638dd909fd754