[INFO] fetching crate realfft 3.3.0...
[INFO] checking realfft-3.3.0 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate realfft 3.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate realfft 3.3.0 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate realfft 3.3.0
[INFO] finished tweaking crates.io crate realfft 3.3.0
[INFO] tweaked toml for crates.io crate realfft 3.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate realfft 3.3.0 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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.163
[INFO] [stderr]   Downloaded transpose v0.2.2
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.86
[INFO] [stderr]   Downloaded primal-check v0.3.3
[INFO] [stderr]   Downloaded getrandom v0.2.9
[INFO] [stderr]   Downloaded log v0.4.18
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.86
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.86
[INFO] [stderr]   Downloaded js-sys v0.3.63
[INFO] [stderr]   Downloaded serde v1.0.163
[INFO] [stderr]   Downloaded serde_json v1.0.96
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.15
[INFO] [stderr]   Downloaded proc-macro2 v1.0.59
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.86
[INFO] [stderr]   Downloaded rustfft v6.1.0
[INFO] [stderr]   Downloaded quote v1.0.28
[INFO] [stderr]   Downloaded unicode-ident v1.0.9
[INFO] [stderr]   Downloaded syn v2.0.18
[INFO] [stderr]   Downloaded regex v1.8.3
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.86
[INFO] [stderr]   Downloaded regex-syntax v0.7.2
[INFO] [stderr]   Downloaded libc v0.2.144
[INFO] [stderr]   Downloaded web-sys v0.3.63
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66660a688ea9cb6fe9e27e9973c2f959cb839a75bdc0c4dafb624caaf522c80d
[INFO] running `Command { std: "docker" "start" "-a" "66660a688ea9cb6fe9e27e9973c2f959cb839a75bdc0c4dafb624caaf522c80d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66660a688ea9cb6fe9e27e9973c2f959cb839a75bdc0c4dafb624caaf522c80d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66660a688ea9cb6fe9e27e9973c2f959cb839a75bdc0c4dafb624caaf522c80d", kill_on_drop: false }`
[INFO] [stdout] 66660a688ea9cb6fe9e27e9973c2f959cb839a75bdc0c4dafb624caaf522c80d
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6be1736f8662c16c895d45482e5ddee8a3b00e78e0b295e9186363753bd2f12f
[INFO] running `Command { std: "docker" "start" "-a" "6be1736f8662c16c895d45482e5ddee8a3b00e78e0b295e9186363753bd2f12f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]    Compiling rustfft v6.1.0
[INFO] [stderr]     Checking strength_reduce v0.2.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking plotters-svg v0.3.3
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.59/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]     Checking crossbeam-channel v0.5.8
[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" "6be1736f8662c16c895d45482e5ddee8a3b00e78e0b295e9186363753bd2f12f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6be1736f8662c16c895d45482e5ddee8a3b00e78e0b295e9186363753bd2f12f", kill_on_drop: false }`
[INFO] [stdout] 6be1736f8662c16c895d45482e5ddee8a3b00e78e0b295e9186363753bd2f12f