[INFO] cloning repository https://github.com/miyayamaM/clean_fizz_buzz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/miyayamaM/clean_fizz_buzz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmiyayamaM%2Fclean_fizz_buzz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmiyayamaM%2Fclean_fizz_buzz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e22a4ad75225cc074b5fd3b2b7b378e8adff65c
[INFO] testing miyayamaM/clean_fizz_buzz against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmiyayamaM%2Fclean_fizz_buzz" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/miyayamaM/clean_fizz_buzz
[INFO] finished tweaking git repo https://github.com/miyayamaM/clean_fizz_buzz
[INFO] tweaked toml for git repo https://github.com/miyayamaM/clean_fizz_buzz written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/miyayamaM/clean_fizz_buzz on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/miyayamaM/clean_fizz_buzz 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded predicates v2.1.5
[INFO] [stderr]   Downloaded mockall_derive v0.11.3
[INFO] [stderr]   Downloaded mockall v0.11.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ba90cd87da5349aa51487baaab77934a81ac93e09e3745a7f64d36d301cf2af
[INFO] running `Command { std: "docker" "start" "-a" "9ba90cd87da5349aa51487baaab77934a81ac93e09e3745a7f64d36d301cf2af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ba90cd87da5349aa51487baaab77934a81ac93e09e3745a7f64d36d301cf2af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ba90cd87da5349aa51487baaab77934a81ac93e09e3745a7f64d36d301cf2af", kill_on_drop: false }`
[INFO] [stdout] 9ba90cd87da5349aa51487baaab77934a81ac93e09e3745a7f64d36d301cf2af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 45efd79a036e96ee4ae8c9f10d3b260bcaea62a9c9388c28e36f004bc204cc64
[INFO] running `Command { std: "docker" "start" "-a" "45efd79a036e96ee4ae8c9f10d3b260bcaea62a9c9388c28e36f004bc204cc64", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling predicates-core v1.0.5
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling termtree v0.4.0
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling fragile v2.0.0
[INFO] [stderr]    Compiling predicates-tree v1.0.7
[INFO] [stderr]    Compiling downcast v0.11.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.50/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" "45efd79a036e96ee4ae8c9f10d3b260bcaea62a9c9388c28e36f004bc204cc64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45efd79a036e96ee4ae8c9f10d3b260bcaea62a9c9388c28e36f004bc204cc64", kill_on_drop: false }`
[INFO] [stdout] 45efd79a036e96ee4ae8c9f10d3b260bcaea62a9c9388c28e36f004bc204cc64