[INFO] cloning repository https://github.com/guigzzz/micrograd-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guigzzz/micrograd-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguigzzz%2Fmicrograd-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguigzzz%2Fmicrograd-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5eee1258e2a6a0271500749a88e5e8a328e39a1c
[INFO] checking guigzzz/micrograd-rs against master#826b673412d2f579e7865b6f26bc9771c6d3b097 for pr-133397
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguigzzz%2Fmicrograd-rs" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/guigzzz/micrograd-rs on toolchain 826b673412d2f579e7865b6f26bc9771c6d3b097
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+826b673412d2f579e7865b6f26bc9771c6d3b097" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guigzzz/micrograd-rs
[INFO] finished tweaking git repo https://github.com/guigzzz/micrograd-rs
[INFO] tweaked toml for git repo https://github.com/guigzzz/micrograd-rs written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/guigzzz/micrograd-rs 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" "+826b673412d2f579e7865b6f26bc9771c6d3b097" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpp_demangle v0.4.0
[INFO] [stderr]   Downloaded inferno v0.11.15
[INFO] [stderr]   Downloaded windows-targets v0.47.0
[INFO] [stderr]   Downloaded iana-time-zone v0.1.55
[INFO] [stderr]   Downloaded arrow-schema v36.0.0
[INFO] [stderr]   Downloaded flatbuffers v23.1.21
[INFO] [stderr]   Downloaded arrow-buffer v36.0.0
[INFO] [stderr]   Downloaded arrow-cast v36.0.0
[INFO] [stderr]   Downloaded arrow-ipc v36.0.0
[INFO] [stderr]   Downloaded arrow-data v36.0.0
[INFO] [stderr]   Downloaded arrow-select v36.0.0
[INFO] [stderr]   Downloaded arrow-array v36.0.0
[INFO] [stderr]   Downloaded seq-macro v0.3.3
[INFO] [stderr]   Downloaded syn v2.0.6
[INFO] [stderr]   Downloaded windows_x86_64_gnullvm v0.47.0
[INFO] [stderr]   Downloaded parquet v36.0.0
[INFO] [stderr]   Downloaded windows_i686_gnu v0.47.0
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.47.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.47.0
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.47.0
[INFO] [stderr]   Downloaded windows_i686_msvc v0.47.0
[INFO] [stderr]   Downloaded windows_aarch64_gnullvm v0.47.0
[INFO] [stderr]   Downloaded windows v0.47.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+826b673412d2f579e7865b6f26bc9771c6d3b097" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a9c8f7abddf7689439ee4b965da1e8c77d62236f49a7bf1a9fdbead33de231a4
[INFO] running `Command { std: "docker" "start" "-a" "a9c8f7abddf7689439ee4b965da1e8c77d62236f49a7bf1a9fdbead33de231a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9c8f7abddf7689439ee4b965da1e8c77d62236f49a7bf1a9fdbead33de231a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9c8f7abddf7689439ee4b965da1e8c77d62236f49a7bf1a9fdbead33de231a4", kill_on_drop: false }`
[INFO] [stdout] a9c8f7abddf7689439ee4b965da1e8c77d62236f49a7bf1a9fdbead33de231a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+826b673412d2f579e7865b6f26bc9771c6d3b097" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab26647f8fd3838830762e0c680beb853fe1ec7224f8c3d8bbe0fa6d7d86e4a1
[INFO] running `Command { std: "docker" "start" "-a" "ab26647f8fd3838830762e0c680beb853fe1ec7224f8c3d8bbe0fa6d7d86e4a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling libm v0.2.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling proc-macro2 v1.0.53
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]    Compiling ahash v0.8.3
[INFO] [stderr]    Compiling semver v1.0.17
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]     Checking lexical-util v0.8.5
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling io-lifetimes v1.0.9
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]     Checking arrow-schema v36.0.0
[INFO] [stderr]     Checking iana-time-zone v0.1.55
[INFO] [stderr]    Compiling rustix v0.36.11
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.53/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]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking linux-raw-sys v0.1.4
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]     Checking lexical-write-integer v0.8.5
[INFO] [stderr]     Checking lexical-parse-integer v0.8.6
[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" "ab26647f8fd3838830762e0c680beb853fe1ec7224f8c3d8bbe0fa6d7d86e4a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab26647f8fd3838830762e0c680beb853fe1ec7224f8c3d8bbe0fa6d7d86e4a1", kill_on_drop: false }`
[INFO] [stdout] ab26647f8fd3838830762e0c680beb853fe1ec7224f8c3d8bbe0fa6d7d86e4a1