[INFO] fetching crate sierra-proc 0.6.0...
[INFO] checking sierra-proc-0.6.0 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate sierra-proc 0.6.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate sierra-proc 0.6.0 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 sierra-proc 0.6.0
[INFO] finished tweaking crates.io crate sierra-proc 0.6.0
[INFO] tweaked toml for crates.io crate sierra-proc 0.6.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding proc-easy v0.2.3 (latest: v0.3.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-easy v0.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 14f79bdadc9c0a2c20684c38e91b475b031d15223eda2ee5315769493350fcd5
[INFO] running `Command { std: "docker" "start" "-a" "14f79bdadc9c0a2c20684c38e91b475b031d15223eda2ee5315769493350fcd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14f79bdadc9c0a2c20684c38e91b475b031d15223eda2ee5315769493350fcd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14f79bdadc9c0a2c20684c38e91b475b031d15223eda2ee5315769493350fcd5", kill_on_drop: false }`
[INFO] [stdout] 14f79bdadc9c0a2c20684c38e91b475b031d15223eda2ee5315769493350fcd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 2243c63a7f9a51d38ab579a31734f2f1c9276265c2e0d05b756196bd28abd06e
[INFO] running `Command { std: "docker" "start" "-a" "2243c63a7f9a51d38ab579a31734f2f1c9276265c2e0d05b756196bd28abd06e", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking proc-macro2 v1.0.86
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking proc-easy v0.2.3
[INFO] [stderr]     Checking sierra-proc v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `ty` is never read
[INFO] [stdout]   --> src/pass/parse.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Attachment {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 17 |     pub member: syn::Member,
[INFO] [stdout] 18 |     pub ty: syn::Type,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ty` is never read
[INFO] [stdout]   --> src/pass/parse.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Attachment {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 17 |     pub member: syn::Member,
[INFO] [stdout] 18 |     pub ty: syn::Type,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[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 6.29s
[INFO] running `Command { std: "docker" "inspect" "2243c63a7f9a51d38ab579a31734f2f1c9276265c2e0d05b756196bd28abd06e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2243c63a7f9a51d38ab579a31734f2f1c9276265c2e0d05b756196bd28abd06e", kill_on_drop: false }`
[INFO] [stdout] 2243c63a7f9a51d38ab579a31734f2f1c9276265c2e0d05b756196bd28abd06e