[INFO] cloning repository https://github.com/danilowhk/100_days_of_cryptography_and_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danilowhk/100_days_of_cryptography_and_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanilowhk%2F100_days_of_cryptography_and_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanilowhk%2F100_days_of_cryptography_and_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d7765a86903cb9fea90fbda1e10ef3d00bb86c9a
[INFO] checking danilowhk/100_days_of_cryptography_and_rust against master#023084804e5e8ea42877451c2b3030e7050281cc for pr-123909
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanilowhk%2F100_days_of_cryptography_and_rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust on toolchain 023084804e5e8ea42877451c2b3030e7050281cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+023084804e5e8ea42877451c2b3030e7050281cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust
[INFO] finished tweaking git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust
[INFO] tweaked toml for git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust 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" "+023084804e5e8ea42877451c2b3030e7050281cc" "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
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking danilowhk/100_days_of_cryptography_and_rust against try#3b6ef522ec6da5b39fa0cf004b820c15884319db for pr-123909
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanilowhk%2F100_days_of_cryptography_and_rust" "/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/danilowhk/100_days_of_cryptography_and_rust on toolchain 3b6ef522ec6da5b39fa0cf004b820c15884319db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3b6ef522ec6da5b39fa0cf004b820c15884319db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust
[INFO] finished tweaking git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust
[INFO] tweaked toml for git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/danilowhk/100_days_of_cryptography_and_rust 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" "+3b6ef522ec6da5b39fa0cf004b820c15884319db" "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 keccak v0.1.3
[INFO] [stderr]   Downloaded digest v0.10.6
[INFO] [stderr]   Downloaded serde v1.0.155
[INFO] [stderr]   Downloaded quote v1.0.25
[INFO] [stderr]   Downloaded serde_derive v1.0.155
[INFO] [stderr]   Downloaded sha3 v0.10.6
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+3b6ef522ec6da5b39fa0cf004b820c15884319db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6543846c406b30b5131586501be0612fe621a0b29a85c86f1069c4acce67208d
[INFO] running `Command { std: "docker" "start" "-a" "6543846c406b30b5131586501be0612fe621a0b29a85c86f1069c4acce67208d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6543846c406b30b5131586501be0612fe621a0b29a85c86f1069c4acce67208d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6543846c406b30b5131586501be0612fe621a0b29a85c86f1069c4acce67208d", kill_on_drop: false }`
[INFO] [stdout] 6543846c406b30b5131586501be0612fe621a0b29a85c86f1069c4acce67208d
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+3b6ef522ec6da5b39fa0cf004b820c15884319db" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d16adc37ae8311e001b5d4f7ee2e7171e7532f53a5d69126f2d8064ea546cc40
[INFO] running `Command { std: "docker" "start" "-a" "d16adc37ae8311e001b5d4f7ee2e7171e7532f53a5d69126f2d8064ea546cc40", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling quote v1.0.25
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling serde_derive v1.0.155
[INFO] [stderr]    Compiling serde v1.0.155
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling serde_json v1.0.94
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.52
[INFO] [stderr]     Checking keccak v0.1.3
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.52/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 itertools v0.10.5
[INFO] [stdout] error: aborting due to 1 previous error
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d16adc37ae8311e001b5d4f7ee2e7171e7532f53a5d69126f2d8064ea546cc40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d16adc37ae8311e001b5d4f7ee2e7171e7532f53a5d69126f2d8064ea546cc40", kill_on_drop: false }`
[INFO] [stdout] d16adc37ae8311e001b5d4f7ee2e7171e7532f53a5d69126f2d8064ea546cc40