[INFO] fetching crate json-ns 0.1.0...
[INFO] checking json-ns-0.1.0 against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] extracting crate json-ns 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate json-ns 0.1.0 on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate json-ns 0.1.0
[INFO] finished tweaking crates.io crate json-ns 0.1.0
[INFO] tweaked toml for crates.io crate json-ns 0.1.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2b1564271fad78c68cc348147678695acd03efc3c335077c5da32cf01a4fcfee
[INFO] running `Command { std: "docker" "start" "-a" "2b1564271fad78c68cc348147678695acd03efc3c335077c5da32cf01a4fcfee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b1564271fad78c68cc348147678695acd03efc3c335077c5da32cf01a4fcfee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1564271fad78c68cc348147678695acd03efc3c335077c5da32cf01a4fcfee", kill_on_drop: false }`
[INFO] [stdout] 2b1564271fad78c68cc348147678695acd03efc3c335077c5da32cf01a4fcfee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90fd1fc6043915fa02bbcc0c0e9cb5f51d9f0fe5c3c9fbd882e5956f7d7a82f5
[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" "90fd1fc6043915fa02bbcc0c0e9cb5f51d9f0fe5c3c9fbd882e5956f7d7a82f5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking json-ns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.72s
[INFO] running `Command { std: "docker" "inspect" "90fd1fc6043915fa02bbcc0c0e9cb5f51d9f0fe5c3c9fbd882e5956f7d7a82f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90fd1fc6043915fa02bbcc0c0e9cb5f51d9f0fe5c3c9fbd882e5956f7d7a82f5", kill_on_drop: false }`
[INFO] [stdout] 90fd1fc6043915fa02bbcc0c0e9cb5f51d9f0fe5c3c9fbd882e5956f7d7a82f5