[INFO] fetching crate four-char-code-macros-impl 0.0.2...
[INFO] checking four-char-code-macros-impl-0.0.2 against beta for pr-78714
[INFO] extracting crate four-char-code-macros-impl 0.0.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate four-char-code-macros-impl 0.0.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate four-char-code-macros-impl 0.0.2
[INFO] finished tweaking crates.io crate four-char-code-macros-impl 0.0.2
[INFO] tweaked toml for crates.io crate four-char-code-macros-impl 0.0.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ea33bf02470e944cc5620114c88b9784483dfa23a837b3077c2788bbde3805d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5ea33bf02470e944cc5620114c88b9784483dfa23a837b3077c2788bbde3805d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ea33bf02470e944cc5620114c88b9784483dfa23a837b3077c2788bbde3805d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ea33bf02470e944cc5620114c88b9784483dfa23a837b3077c2788bbde3805d", kill_on_drop: false }`
[INFO] [stdout] 5ea33bf02470e944cc5620114c88b9784483dfa23a837b3077c2788bbde3805d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f45cc9a532702fa40eadf4c509a59d62a2e9f52ba1f8b8815141cf666a5c0ef
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5f45cc9a532702fa40eadf4c509a59d62a2e9f52ba1f8b8815141cf666a5c0ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking four-char-code-macros-impl v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.99s
[INFO] running `Command { std: "docker" "inspect" "5f45cc9a532702fa40eadf4c509a59d62a2e9f52ba1f8b8815141cf666a5c0ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f45cc9a532702fa40eadf4c509a59d62a2e9f52ba1f8b8815141cf666a5c0ef", kill_on_drop: false }`
[INFO] [stdout] 5f45cc9a532702fa40eadf4c509a59d62a2e9f52ba1f8b8815141cf666a5c0ef