[INFO] fetching crate etcd-rs 1.0.1...
[INFO] checking etcd-rs-1.0.1 against nightly-2024-02-05 for check-cfg
[INFO] extracting crate etcd-rs 1.0.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate etcd-rs 1.0.1 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate etcd-rs 1.0.1
[INFO] finished tweaking crates.io crate etcd-rs 1.0.1
[INFO] tweaked toml for crates.io crate etcd-rs 1.0.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate etcd-rs 1.0.1 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" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded prost-derive v0.11.8
[INFO] [stderr]   Downloaded async-stream v0.3.3
[INFO] [stderr]   Downloaded prost v0.11.8
[INFO] [stderr]   Downloaded axum-core v0.3.3
[INFO] [stderr]   Downloaded async-stream-impl v0.3.3
[INFO] [stderr]   Downloaded tokio-stream v0.1.9
[INFO] [stderr]   Downloaded prost-types v0.11.8
[INFO] [stderr]   Downloaded tonic-build v0.9.1
[INFO] [stderr]   Downloaded tokio-util v0.7.3
[INFO] [stderr]   Downloaded axum v0.6.12
[INFO] [stderr]   Downloaded rustls v0.21.0
[INFO] [stderr]   Downloaded prettyplease v0.1.18
[INFO] [stderr]   Downloaded prost-build v0.11.8
[INFO] [stderr]   Downloaded which v4.2.5
[INFO] [stderr]   Downloaded futures v0.3.24
[INFO] [stderr]   Downloaded tonic v0.9.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0f7054806686fcbefff8681c7acc9aa84dc4466d93444a940ebfd0c29dea390
[INFO] running `Command { std: "docker" "start" "-a" "c0f7054806686fcbefff8681c7acc9aa84dc4466d93444a940ebfd0c29dea390", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0f7054806686fcbefff8681c7acc9aa84dc4466d93444a940ebfd0c29dea390", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0f7054806686fcbefff8681c7acc9aa84dc4466d93444a940ebfd0c29dea390", kill_on_drop: false }`
[INFO] [stdout] c0f7054806686fcbefff8681c7acc9aa84dc4466d93444a940ebfd0c29dea390
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54a6fd853d3b3e538b67036f62f82d31d028653f627c2a3bfd94da2339d2cd7a
[INFO] running `Command { std: "docker" "start" "-a" "54a6fd853d3b3e538b67036f62f82d31d028653f627c2a3bfd94da2339d2cd7a", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]     Checking once_cell v1.13.1
[INFO] [stderr]    Compiling futures-channel v0.3.24
[INFO] [stderr]    Compiling futures-task v0.3.24
[INFO] [stderr]    Compiling lock_api v0.4.8
[INFO] [stderr]    Compiling tokio v1.27.0
[INFO] [stderr]    Compiling anyhow v1.0.62
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling futures-util v0.3.24
[INFO] [stderr]     Checking futures-io v0.3.24
[INFO] [stderr]    Compiling rustversion v1.0.12
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/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 bytes v1.2.1
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "54a6fd853d3b3e538b67036f62f82d31d028653f627c2a3bfd94da2339d2cd7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54a6fd853d3b3e538b67036f62f82d31d028653f627c2a3bfd94da2339d2cd7a", kill_on_drop: false }`
[INFO] [stdout] 54a6fd853d3b3e538b67036f62f82d31d028653f627c2a3bfd94da2339d2cd7a
