[INFO] cloning repository https://github.com/solfonte/TP1-concurrentes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/solfonte/TP1-concurrentes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsolfonte%2FTP1-concurrentes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsolfonte%2FTP1-concurrentes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1aa74ea02766e2e9f438d70f71d1daca24a9278a
[INFO] checking solfonte/TP1-concurrentes against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsolfonte%2FTP1-concurrentes" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/solfonte/TP1-concurrentes
[INFO] finished tweaking git repo https://github.com/solfonte/TP1-concurrentes
[INFO] tweaked toml for git repo https://github.com/solfonte/TP1-concurrentes written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/solfonte/TP1-concurrentes on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/solfonte/TP1-concurrentes 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f613389d56a0751944faedc6626d3d62ccc0b84a851e5d2e8d0ea3d13d201cf2
[INFO] running `Command { std: "docker" "start" "-a" "f613389d56a0751944faedc6626d3d62ccc0b84a851e5d2e8d0ea3d13d201cf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f613389d56a0751944faedc6626d3d62ccc0b84a851e5d2e8d0ea3d13d201cf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f613389d56a0751944faedc6626d3d62ccc0b84a851e5d2e8d0ea3d13d201cf2", kill_on_drop: false }`
[INFO] [stdout] f613389d56a0751944faedc6626d3d62ccc0b84a851e5d2e8d0ea3d13d201cf2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5760d07a447b1e6a6c3a8dcdacc72d06d591d27c9960a9c7365eaaa98b6921bd
[INFO] running `Command { std: "docker" "start" "-a" "5760d07a447b1e6a6c3a8dcdacc72d06d591d27c9960a9c7365eaaa98b6921bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]     Checking regex-syntax v0.7.1
[INFO] [stderr]     Checking predicates-core v1.0.6
[INFO] [stderr]     Checking termtree v0.4.1
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking downcast v0.11.0
[INFO] [stderr]     Checking fragile v2.0.0
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking predicates-tree v1.0.9
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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] [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" "5760d07a447b1e6a6c3a8dcdacc72d06d591d27c9960a9c7365eaaa98b6921bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5760d07a447b1e6a6c3a8dcdacc72d06d591d27c9960a9c7365eaaa98b6921bd", kill_on_drop: false }`
[INFO] [stdout] 5760d07a447b1e6a6c3a8dcdacc72d06d591d27c9960a9c7365eaaa98b6921bd