[INFO] fetching crate neural-network-rs 0.1.4...
[INFO] checking neural-network-rs-0.1.4 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate neural-network-rs 0.1.4 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate neural-network-rs 0.1.4
[INFO] finished tweaking crates.io crate neural-network-rs 0.1.4
[INFO] tweaked toml for crates.io crate neural-network-rs 0.1.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate neural-network-rs 0.1.4 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate neural-network-rs 0.1.4 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: file `/workspace/builds/worker-7-tc1/source/src/main.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `lib` target `neural_network_rs`
[INFO] [stderr]   * `bin` target `neural-network-rs`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded iana-time-zone-haiku v0.1.0
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.78
[INFO] [stderr]   Downloaded iana-time-zone v0.1.51
[INFO] [stderr]   Downloaded ndarray-rand v0.14.0
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.78
[INFO] [stderr]   Downloaded png v0.17.6
[INFO] [stderr]   Downloaded cxx-build v1.0.78
[INFO] [stderr]   Downloaded cxx v1.0.78
[INFO] [stderr]   Downloaded image v0.24.4
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1cea175fb93ab95b53b01c5f4cdce7543441b68c4aa94f170d81a892eb78d83e
[INFO] running `Command { std: "docker" "start" "-a" "1cea175fb93ab95b53b01c5f4cdce7543441b68c4aa94f170d81a892eb78d83e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cea175fb93ab95b53b01c5f4cdce7543441b68c4aa94f170d81a892eb78d83e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cea175fb93ab95b53b01c5f4cdce7543441b68c4aa94f170d81a892eb78d83e", kill_on_drop: false }`
[INFO] [stdout] 1cea175fb93ab95b53b01c5f4cdce7543441b68c4aa94f170d81a892eb78d83e
[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=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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9fb1a65c74f50ab0aebf24651e265b3a9d626e9b98ba67bea0ca98dc263c974
[INFO] running `Command { std: "docker" "start" "-a" "e9fb1a65c74f50ab0aebf24651e265b3a9d626e9b98ba67bea0ca98dc263c974", kill_on_drop: false }`
[INFO] [stderr] warning: file `/opt/rustwide/workdir/src/main.rs` found to be present in multiple build targets:
[INFO] [stderr]   * `lib` target `neural_network_rs`
[INFO] [stderr]   * `bin` target `neural-network-rs`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling libm v0.2.5
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking libloading v0.7.3
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking dlib v0.5.0
[INFO] [stderr]     Checking bytemuck v1.12.1
[INFO] [stderr]     Checking jpeg-decoder v0.2.6
[INFO] [stderr]    Compiling font-kit v0.11.0
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]     Checking weezl v0.1.7
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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 lazy_static v1.4.0
[INFO] [stderr]     Checking gif v0.11.4
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking iana-time-zone v0.1.51
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]    Compiling cmake v0.1.48
[INFO] [stderr]     Checking plotters-svg v0.3.3
[INFO] [stderr]     Checking ttf-parser v0.15.2
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]    Compiling yeslogic-fontconfig-sys v3.2.0
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling freetype-sys v0.13.1
[INFO] [stderr]     Checking png v0.17.6
[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" "e9fb1a65c74f50ab0aebf24651e265b3a9d626e9b98ba67bea0ca98dc263c974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9fb1a65c74f50ab0aebf24651e265b3a9d626e9b98ba67bea0ca98dc263c974", kill_on_drop: false }`
[INFO] [stdout] e9fb1a65c74f50ab0aebf24651e265b3a9d626e9b98ba67bea0ca98dc263c974