[INFO] cloning repository https://github.com/titoco3000/papete
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/titoco3000/papete" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftitoco3000%2Fpapete", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftitoco3000%2Fpapete'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5d6b4802699eb8d0ae593c6a2160aa72d439669b
[INFO] checking titoco3000/papete against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftitoco3000%2Fpapete" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/titoco3000/papete
[INFO] finished tweaking git repo https://github.com/titoco3000/papete
[INFO] tweaked toml for git repo https://github.com/titoco3000/papete written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/titoco3000/papete on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/titoco3000/papete 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linecount v0.1.0
[INFO] [stderr]   Downloaded crossbeam v0.2.12
[INFO] [stderr]   Downloaded serialport v4.2.1
[INFO] [stderr]   Downloaded rustlearn v0.5.0
[INFO] [stderr]   Downloaded torch-sys v0.4.1
[INFO] [stderr]   Downloaded ndarray v0.14.0
[INFO] [stderr]   Downloaded tch v0.4.1
[INFO] [stderr]   Downloaded curl-sys v0.4.63+curl-8.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4533e5c780b675c7e3055ce3a2fb7376d0b17ccdb617f52836f4818d9e2c414b
[INFO] running `Command { std: "docker" "start" "-a" "4533e5c780b675c7e3055ce3a2fb7376d0b17ccdb617f52836f4818d9e2c414b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4533e5c780b675c7e3055ce3a2fb7376d0b17ccdb617f52836f4818d9e2c414b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4533e5c780b675c7e3055ce3a2fb7376d0b17ccdb617f52836f4818d9e2c414b", kill_on_drop: false }`
[INFO] [stdout] 4533e5c780b675c7e3055ce3a2fb7376d0b17ccdb617f52836f4818d9e2c414b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e704a0f9b5a17a46a37b4d21fffd3572a491709a1bf96e2c5d66e94d4e39adee
[INFO] running `Command { std: "docker" "start" "-a" "e704a0f9b5a17a46a37b4d21fffd3572a491709a1bf96e2c5d66e94d4e39adee", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling curl v0.4.44
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling miniz_oxide v0.7.1
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling serde v1.0.164
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling ndarray v0.14.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.59/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 matrixmultiply v0.2.4
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling flate2 v1.0.26
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking bitflags v2.0.2
[INFO] [stderr]    Compiling rustlearn v0.5.0
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking scopeguard v1.1.0
[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" "e704a0f9b5a17a46a37b4d21fffd3572a491709a1bf96e2c5d66e94d4e39adee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e704a0f9b5a17a46a37b4d21fffd3572a491709a1bf96e2c5d66e94d4e39adee", kill_on_drop: false }`
[INFO] [stdout] e704a0f9b5a17a46a37b4d21fffd3572a491709a1bf96e2c5d66e94d4e39adee