[INFO] fetching crate nifti 0.16.0...
[INFO] checking nifti-0.16.0 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate nifti 0.16.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate nifti 0.16.0 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 nifti 0.16.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate nifti 0.16.0
[INFO] tweaked toml for crates.io crate nifti 0.16.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate nifti 0.16.0 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nalgebra-macros v0.2.0
[INFO] [stderr]   Downloaded nalgebra v0.32.2
[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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e09ba38d2a77438120eccff10eaa05e8ac35b89d6e1c76a76f8459456092e7d
[INFO] running `Command { std: "docker" "start" "-a" "9e09ba38d2a77438120eccff10eaa05e8ac35b89d6e1c76a76f8459456092e7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e09ba38d2a77438120eccff10eaa05e8ac35b89d6e1c76a76f8459456092e7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e09ba38d2a77438120eccff10eaa05e8ac35b89d6e1c76a76f8459456092e7d", kill_on_drop: false }`
[INFO] [stdout] 9e09ba38d2a77438120eccff10eaa05e8ac35b89d6e1c76a76f8459456092e7d
[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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d1112a36dddc56ef179c61887ec0eefd172215ec834dda1bf5f3439679c9c8b
[INFO] running `Command { std: "docker" "start" "-a" "3d1112a36dddc56ef179c61887ec0eefd172215ec834dda1bf5f3439679c9c8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling syn v1.0.104
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.47/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 miniz_oxide v0.6.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking rgb v0.8.36
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking quick-error v2.0.1
[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" "3d1112a36dddc56ef179c61887ec0eefd172215ec834dda1bf5f3439679c9c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d1112a36dddc56ef179c61887ec0eefd172215ec834dda1bf5f3439679c9c8b", kill_on_drop: false }`
[INFO] [stdout] 3d1112a36dddc56ef179c61887ec0eefd172215ec834dda1bf5f3439679c9c8b