[INFO] fetching crate maelstrom-node 0.1.6...
[INFO] checking maelstrom-node-0.1.6 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate maelstrom-node 0.1.6 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate maelstrom-node 0.1.6
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate maelstrom-node 0.1.6
[INFO] tweaked toml for crates.io crate maelstrom-node 0.1.6 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate maelstrom-node 0.1.6 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 maelstrom-node 0.1.6 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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-context v0.1.3
[INFO] [stderr]   Downloaded simple-error v0.3.0
[INFO] [stderr]   Downloaded rustix v0.37.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 7faba63f1fa81668fe266d22212a1cf532b4f89cd20e8a9075a1670753cbcff6
[INFO] running `Command { std: "docker" "start" "-a" "7faba63f1fa81668fe266d22212a1cf532b4f89cd20e8a9075a1670753cbcff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7faba63f1fa81668fe266d22212a1cf532b4f89cd20e8a9075a1670753cbcff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7faba63f1fa81668fe266d22212a1cf532b4f89cd20e8a9075a1670753cbcff6", kill_on_drop: false }`
[INFO] [stdout] 7faba63f1fa81668fe266d22212a1cf532b4f89cd20e8a9075a1670753cbcff6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a9c232d38d65f415495a299808e76406ae155a2e1bf2e3581060f167719f44ce
[INFO] running `Command { std: "docker" "start" "-a" "a9c232d38d65f415495a299808e76406ae155a2e1bf2e3581060f167719f44ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling tokio v1.27.0
[INFO] [stderr]    Compiling rustix v0.37.7
[INFO] [stderr]    Compiling serde_derive v1.0.159
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking linux-raw-sys v0.3.1
[INFO] [stderr]    Compiling serde v1.0.159
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]    Compiling serde_json v1.0.95
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]     Checking simple-error v0.3.0
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a9c232d38d65f415495a299808e76406ae155a2e1bf2e3581060f167719f44ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9c232d38d65f415495a299808e76406ae155a2e1bf2e3581060f167719f44ce", kill_on_drop: false }`
[INFO] [stdout] a9c232d38d65f415495a299808e76406ae155a2e1bf2e3581060f167719f44ce