[INFO] cloning repository https://github.com/Michaelsladkov/decision_tree_c45
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Michaelsladkov/decision_tree_c45" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichaelsladkov%2Fdecision_tree_c45", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichaelsladkov%2Fdecision_tree_c45'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9a00858f4395ea3fa41ca731c430dc55e47bf18f
[INFO] checking Michaelsladkov/decision_tree_c45 against try#173780a87744406b7489b28349c0176f14bb3881 for pr-135841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichaelsladkov%2Fdecision_tree_c45" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Michaelsladkov/decision_tree_c45 on toolchain 173780a87744406b7489b28349c0176f14bb3881
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Michaelsladkov/decision_tree_c45
[INFO] finished tweaking git repo https://github.com/Michaelsladkov/decision_tree_c45
[INFO] tweaked toml for git repo https://github.com/Michaelsladkov/decision_tree_c45 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Michaelsladkov/decision_tree_c45 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" "+173780a87744406b7489b28349c0176f14bb3881" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking Michaelsladkov/decision_tree_c45 against try#173780a87744406b7489b28349c0176f14bb3881 for pr-135841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichaelsladkov%2Fdecision_tree_c45" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Michaelsladkov/decision_tree_c45 on toolchain 173780a87744406b7489b28349c0176f14bb3881
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Michaelsladkov/decision_tree_c45
[INFO] finished tweaking git repo https://github.com/Michaelsladkov/decision_tree_c45
[INFO] tweaked toml for git repo https://github.com/Michaelsladkov/decision_tree_c45 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Michaelsladkov/decision_tree_c45 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" "+173780a87744406b7489b28349c0176f14bb3881" "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 plotters-bitmap v0.3.2
[INFO] [stderr]   Downloaded plotters-backend v0.3.4
[INFO] [stderr]   Downloaded plotters-svg v0.3.3
[INFO] [stderr]   Downloaded plotters v0.3.4
[INFO] [stderr]   Downloaded freetype v0.7.0
[INFO] [stderr]   Downloaded pathfinder_simd v0.5.1
[INFO] [stderr]   Downloaded pest v2.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ecf8678d24538a804a8017ae52a80959d20e18d26c3aa96ee4f54f174ff3c226
[INFO] running `Command { std: "docker" "start" "-a" "ecf8678d24538a804a8017ae52a80959d20e18d26c3aa96ee4f54f174ff3c226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ecf8678d24538a804a8017ae52a80959d20e18d26c3aa96ee4f54f174ff3c226", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecf8678d24538a804a8017ae52a80959d20e18d26c3aa96ee4f54f174ff3c226", kill_on_drop: false }`
[INFO] [stdout] ecf8678d24538a804a8017ae52a80959d20e18d26c3aa96ee4f54f174ff3c226
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 82b16abc09946535a2feab0ac11269c1916794060d087bf422099ad083dfb3b3
[INFO] running `Command { std: "docker" "start" "-a" "82b16abc09946535a2feab0ac11269c1916794060d087bf422099ad083dfb3b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling syn v1.0.103
[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 num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking libloading v0.7.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/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 color_quant v1.1.0
[INFO] [stderr]    Compiling yeslogic-fontconfig-sys v3.2.0
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]     Checking dlib v0.5.0
[INFO] [stderr]     Checking flate2 v1.0.24
[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" "82b16abc09946535a2feab0ac11269c1916794060d087bf422099ad083dfb3b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82b16abc09946535a2feab0ac11269c1916794060d087bf422099ad083dfb3b3", kill_on_drop: false }`
[INFO] [stdout] 82b16abc09946535a2feab0ac11269c1916794060d087bf422099ad083dfb3b3