[INFO] fetching crate fuel-etk-4byte 0.3.1-dev...
[INFO] checking fuel-etk-4byte-0.3.1-dev against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate fuel-etk-4byte 0.3.1-dev into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate fuel-etk-4byte 0.3.1-dev on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fuel-etk-4byte 0.3.1-dev
[INFO] finished tweaking crates.io crate fuel-etk-4byte 0.3.1-dev
[INFO] tweaked toml for crates.io crate fuel-etk-4byte 0.3.1-dev written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate fuel-etk-4byte 0.3.1-dev 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98704917bc10c586f0d8f1e4b164e2ea5f86105f3c6bbab04cdbb4587bafa7dd
[INFO] running `Command { std: "docker" "start" "-a" "98704917bc10c586f0d8f1e4b164e2ea5f86105f3c6bbab04cdbb4587bafa7dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98704917bc10c586f0d8f1e4b164e2ea5f86105f3c6bbab04cdbb4587bafa7dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98704917bc10c586f0d8f1e4b164e2ea5f86105f3c6bbab04cdbb4587bafa7dd", kill_on_drop: false }`
[INFO] [stdout] 98704917bc10c586f0d8f1e4b164e2ea5f86105f3c6bbab04cdbb4587bafa7dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d38b1e7c831f582d4ea677f7ff02e3dd92fb35335d7c29e722bb88ef739386e2
[INFO] running `Command { std: "docker" "start" "-a" "d38b1e7c831f582d4ea677f7ff02e3dd92fb35335d7c29e722bb88ef739386e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.4
[INFO] [stderr]     Checking alloc-stdlib v0.2.2
[INFO] [stderr]     Checking brotli-decompressor v2.3.4
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.50/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] [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" "d38b1e7c831f582d4ea677f7ff02e3dd92fb35335d7c29e722bb88ef739386e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d38b1e7c831f582d4ea677f7ff02e3dd92fb35335d7c29e722bb88ef739386e2", kill_on_drop: false }`
[INFO] [stdout] d38b1e7c831f582d4ea677f7ff02e3dd92fb35335d7c29e722bb88ef739386e2