[INFO] cloning repository https://github.com/ultimate-research/prc-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ultimate-research/prc-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fultimate-research%2Fprc-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fultimate-research%2Fprc-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b13fdedb56f7f228f2dfeb5739339d3807349b0
[INFO] checking ultimate-research/prc-rs against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fultimate-research%2Fprc-rs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ultimate-research/prc-rs on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ultimate-research/prc-rs
[INFO] removed workspace from git repo https://github.com/ultimate-research/prc-rs
[INFO] finished tweaking git repo https://github.com/ultimate-research/prc-rs
[INFO] tweaked toml for git repo https://github.com/ultimate-research/prc-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6ed31928c529b7df652eb0d493b724cfb1d96570c7bbf43d42e3bd56d34f581
[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" "a6ed31928c529b7df652eb0d493b724cfb1d96570c7bbf43d42e3bd56d34f581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6ed31928c529b7df652eb0d493b724cfb1d96570c7bbf43d42e3bd56d34f581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6ed31928c529b7df652eb0d493b724cfb1d96570c7bbf43d42e3bd56d34f581", kill_on_drop: false }`
[INFO] [stdout] a6ed31928c529b7df652eb0d493b724cfb1d96570c7bbf43d42e3bd56d34f581
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f87d09bc7b3264771ed9448d71ac227632829d05b075e9a2e131e80cdfa2e730
[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" "f87d09bc7b3264771ed9448d71ac227632829d05b075e9a2e131e80cdfa2e730", kill_on_drop: false }`
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]     Checking bimap v0.4.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling compile-time-crc32-impl v0.1.0
[INFO] [stderr]    Compiling diff_derive v0.1.1
[INFO] [stderr]     Checking compile-time-crc32 v0.1.2
[INFO] [stderr]     Checking diff-struct v0.2.1
[INFO] [stderr]     Checking hash40 v0.4.3
[INFO] [stderr]     Checking prc-rs v1.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.69s
[INFO] running `Command { std: "docker" "inspect" "f87d09bc7b3264771ed9448d71ac227632829d05b075e9a2e131e80cdfa2e730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f87d09bc7b3264771ed9448d71ac227632829d05b075e9a2e131e80cdfa2e730", kill_on_drop: false }`
[INFO] [stdout] f87d09bc7b3264771ed9448d71ac227632829d05b075e9a2e131e80cdfa2e730