[INFO] fetching crate fnntw 0.4.1...
[INFO] checking fnntw-0.4.1 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate fnntw 0.4.1 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate fnntw 0.4.1
[INFO] finished tweaking crates.io crate fnntw 0.4.1
[INFO] tweaked toml for crates.io crate fnntw 0.4.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fnntw 0.4.1 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fnntw 0.4.1 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tcmalloc v0.3.0
[INFO] [stderr]   Downloaded snmalloc-rs v0.3.3
[INFO] [stderr]   Downloaded tcmalloc-sys v0.3.0
[INFO] [stderr]   Downloaded sync-unsafe-cell v0.1.0
[INFO] [stderr]   Downloaded index-fixed v0.0.2
[INFO] [stderr]   Downloaded jemallocator v0.5.0
[INFO] [stderr]   Downloaded approx_eq v0.1.8
[INFO] [stderr]   Downloaded kth v0.1.0
[INFO] [stderr]   Downloaded concat-idents v1.1.4
[INFO] [stderr]   Downloaded ordered-float v3.4.0
[INFO] [stderr]   Downloaded ndarray-npy v0.8.1
[INFO] [stderr]   Downloaded ouroboros v0.15.6
[INFO] [stderr]   Downloaded dry v0.1.1
[INFO] [stderr]   Downloaded likely_stable v0.1.2
[INFO] [stderr]   Downloaded floydrivest v0.2.4
[INFO] [stderr]   Downloaded mimalloc v0.1.34
[INFO] [stderr]   Downloaded order-stat v0.1.3
[INFO] [stderr]   Downloaded ouroboros_macro v0.15.6
[INFO] [stderr]   Downloaded pdqselect v0.1.1
[INFO] [stderr]   Downloaded rpmalloc-sys v0.2.3+b097fd0
[INFO] [stderr]   Downloaded rpmalloc v0.2.2
[INFO] [stderr]   Downloaded seq-macro v0.3.3
[INFO] [stderr]   Downloaded jemalloc-sys v0.5.3+5.3.0-patched
[INFO] [stderr]   Downloaded libmimalloc-sys v0.1.30
[INFO] [stderr]   Downloaded adqselect v0.1.3
[INFO] [stderr]   Downloaded snmalloc-sys v0.3.3
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a42f1247a3107dc2325d10cddbaea1346e81823cfd0ceee01330c5b46dbad847
[INFO] running `Command { std: "docker" "start" "-a" "a42f1247a3107dc2325d10cddbaea1346e81823cfd0ceee01330c5b46dbad847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a42f1247a3107dc2325d10cddbaea1346e81823cfd0ceee01330c5b46dbad847", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a42f1247a3107dc2325d10cddbaea1346e81823cfd0ceee01330c5b46dbad847", kill_on_drop: false }`
[INFO] [stdout] a42f1247a3107dc2325d10cddbaea1346e81823cfd0ceee01330c5b46dbad847
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 483dba5d153d413af48e8b8f68137106c5b4ec3b8c42c09f07537e437c4e3a8b
[INFO] running `Command { std: "docker" "start" "-a" "483dba5d153d413af48e8b8f68137106c5b4ec3b8c42c09f07537e437c4e3a8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling thiserror v1.0.39
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling const_fn v0.4.9
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling serde_derive v1.0.156
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.7
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]    Compiling kth v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking aliasable v0.1.3
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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 walkdir v2.3.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking flate2 v1.0.25
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking plotters v0.3.4
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking ordered-float v3.4.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[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] running `Command { std: "docker" "inspect" "483dba5d153d413af48e8b8f68137106c5b4ec3b8c42c09f07537e437c4e3a8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "483dba5d153d413af48e8b8f68137106c5b4ec3b8c42c09f07537e437c4e3a8b", kill_on_drop: false }`
[INFO] [stdout] 483dba5d153d413af48e8b8f68137106c5b4ec3b8c42c09f07537e437c4e3a8b