[INFO] fetching crate darling 0.20.10...
[INFO] checking darling-0.20.10 against master#8549802939cd01111c46e34a7b67cb1933977af9 for pr-132712
[INFO] extracting crate darling 0.20.10 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate darling 0.20.10 on toolchain 8549802939cd01111c46e34a7b67cb1933977af9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate darling 0.20.10
[INFO] finished tweaking crates.io crate darling 0.20.10
[INFO] tweaked toml for crates.io crate darling 0.20.10 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate darling 0.20.10 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" "+8549802939cd01111c46e34a7b67cb1933977af9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded toml v0.5.9
[INFO] [stderr]   Downloaded termcolor v1.1.3
[INFO] [stderr]   Downloaded itoa v1.0.4
[INFO] [stderr]   Downloaded glob v0.3.0
[INFO] [stderr]   Downloaded serde_derive v1.0.147
[INFO] [stderr]   Downloaded trybuild v1.0.72
[INFO] [stderr]   Downloaded rustversion v1.0.9
[INFO] [stderr]   Downloaded once_cell v1.16.0
[INFO] [stderr]   Downloaded serde_json v1.0.89
[INFO] [stderr]   Downloaded serde v1.0.148
[INFO] [stderr]   Downloaded unicode-ident v1.0.8
[INFO] [stderr]   Downloaded proc-macro2 v1.0.56
[INFO] [stderr]   Downloaded ryu v1.0.11
[INFO] [stderr]   Downloaded quote v1.0.26
[INFO] [stderr]   Downloaded syn v2.0.16
[INFO] [stderr]   Downloaded syn v1.0.91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e36b3a5c0f61c78bf6f196be3ae805a288b85e878a28b2748327948d6b22b54
[INFO] running `Command { std: "docker" "start" "-a" "5e36b3a5c0f61c78bf6f196be3ae805a288b85e878a28b2748327948d6b22b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e36b3a5c0f61c78bf6f196be3ae805a288b85e878a28b2748327948d6b22b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e36b3a5c0f61c78bf6f196be3ae805a288b85e878a28b2748327948d6b22b54", kill_on_drop: false }`
[INFO] [stdout] 5e36b3a5c0f61c78bf6f196be3ae805a288b85e878a28b2748327948d6b22b54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+8549802939cd01111c46e34a7b67cb1933977af9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f167a950a8415d0cbe448b7bc97d1c52a1c7581ccd5f6c10a0ed720d3a747cc4
[INFO] running `Command { std: "docker" "start" "-a" "f167a950a8415d0cbe448b7bc97d1c52a1c7581ccd5f6c10a0ed720d3a747cc4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]     Checking strsim v0.11.1
[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] [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] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[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] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f167a950a8415d0cbe448b7bc97d1c52a1c7581ccd5f6c10a0ed720d3a747cc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f167a950a8415d0cbe448b7bc97d1c52a1c7581ccd5f6c10a0ed720d3a747cc4", kill_on_drop: false }`
[INFO] [stdout] f167a950a8415d0cbe448b7bc97d1c52a1c7581ccd5f6c10a0ed720d3a747cc4