[INFO] cloning repository https://github.com/lmagitem-learning/greatest-common-divisor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lmagitem-learning/greatest-common-divisor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flmagitem-learning%2Fgreatest-common-divisor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flmagitem-learning%2Fgreatest-common-divisor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3eb4e936cac7a1795b9cc1cd4467679fa431da9f
[INFO] checking lmagitem-learning/greatest-common-divisor/3eb4e936cac7a1795b9cc1cd4467679fa431da9f against try#9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840 for pr-149518
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flmagitem-learning%2Fgreatest-common-divisor" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lmagitem-learning/greatest-common-divisor
[INFO] finished tweaking git repo https://github.com/lmagitem-learning/greatest-common-divisor
[INFO] tweaked toml for git repo https://github.com/lmagitem-learning/greatest-common-divisor written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lmagitem-learning/greatest-common-divisor on toolchain 9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lmagitem-learning/greatest-common-divisor 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" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking lmagitem-learning/greatest-common-divisor/3eb4e936cac7a1795b9cc1cd4467679fa431da9f against try#9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840 for pr-149518
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flmagitem-learning%2Fgreatest-common-divisor" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lmagitem-learning/greatest-common-divisor
[INFO] finished tweaking git repo https://github.com/lmagitem-learning/greatest-common-divisor
[INFO] tweaked toml for git repo https://github.com/lmagitem-learning/greatest-common-divisor written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lmagitem-learning/greatest-common-divisor on toolchain 9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lmagitem-learning/greatest-common-divisor 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" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "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 const-random v0.1.13
[INFO] [stderr]   Downloaded serde v1.0.145
[INFO] [stderr]   Downloaded actix-connect v0.2.5
[INFO] [stderr]   Downloaded enum-as-inner v0.2.1
[INFO] [stderr]   Downloaded serde_derive v1.0.145
[INFO] [stderr]   Downloaded actix-threadpool v0.1.2
[INFO] [stderr]   Downloaded actix-router v0.1.5
[INFO] [stderr]   Downloaded actix-server v0.6.1
[INFO] [stderr]   Downloaded tokio-signal v0.2.9
[INFO] [stderr]   Downloaded actix-rt v0.2.6
[INFO] [stderr]   Downloaded actix-utils v0.4.7
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.79
[INFO] [stderr]   Downloaded actix-service v0.4.2
[INFO] [stderr]   Downloaded cxx-build v1.0.79
[INFO] [stderr]   Downloaded trust-dns-resolver v0.11.1
[INFO] [stderr]   Downloaded http v0.1.21
[INFO] [stderr]   Downloaded h2 v0.1.26
[INFO] [stderr]   Downloaded cxx v1.0.79
[INFO] [stderr]   Downloaded awc v0.2.8
[INFO] [stderr]   Downloaded trust-dns-proto v0.7.4
[INFO] [stderr]   Downloaded syn v1.0.102
[INFO] [stderr]   Downloaded chrono v0.4.22
[INFO] [stderr]   Downloaded serde_json v1.0.86
[INFO] [stderr]   Downloaded iana-time-zone v0.1.51
[INFO] [stderr]   Downloaded tokio-current-thread v0.1.7
[INFO] [stderr]   Downloaded actix-web v1.0.9
[INFO] [stderr]   Downloaded actix-http v0.2.11
[INFO] [stderr]   Downloaded resolv-conf v0.6.3
[INFO] [stderr]   Downloaded scratch v1.0.2
[INFO] [stderr]   Downloaded hashbrown v0.6.3
[INFO] [stderr]   Downloaded actix-testing v0.1.0
[INFO] [stderr]   Downloaded actix-web-codegen v0.1.3
[INFO] [stderr]   Downloaded actix-server-config v0.1.2
[INFO] [stderr]   Downloaded link-cplusplus v1.0.7
[INFO] [stderr]   Downloaded string v0.2.1
[INFO] [stderr]   Downloaded const-random-macro v0.1.13
[INFO] [stderr]   Downloaded actix-codec v0.1.2
[INFO] [stderr]   Downloaded tokio-udp v0.1.6
[INFO] [stderr]   Downloaded libc v0.2.135
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.79
[INFO] [stderr]   Downloaded ahash v0.2.19
[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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 24b8b73a232a8e3cfcfe7b9083d72df6d8681e4dfed06309c60bf89209aaf653
[INFO] running `Command { std: "docker" "start" "-a" "24b8b73a232a8e3cfcfe7b9083d72df6d8681e4dfed06309c60bf89209aaf653", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24b8b73a232a8e3cfcfe7b9083d72df6d8681e4dfed06309c60bf89209aaf653", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24b8b73a232a8e3cfcfe7b9083d72df6d8681e4dfed06309c60bf89209aaf653", kill_on_drop: false }`
[INFO] [stdout] 24b8b73a232a8e3cfcfe7b9083d72df6d8681e4dfed06309c60bf89209aaf653
[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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4f487a625106cd0022e6358b6ee74ac0f5146aebabd806194c69902ff220d11
[INFO] running `Command { std: "docker" "start" "-a" "a4f487a625106cd0022e6358b6ee74ac0f5146aebabd806194c69902ff220d11", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[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 slab v0.4.7
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking tokio-sync v0.1.8
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling aho-corasick v0.7.19
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling failure_derive v0.1.8
[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]    Compiling rand v0.6.5
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[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" "a4f487a625106cd0022e6358b6ee74ac0f5146aebabd806194c69902ff220d11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4f487a625106cd0022e6358b6ee74ac0f5146aebabd806194c69902ff220d11", kill_on_drop: false }`
[INFO] [stdout] a4f487a625106cd0022e6358b6ee74ac0f5146aebabd806194c69902ff220d11