[INFO] fetching crate number_prefix 0.4.0...
[INFO] checking number_prefix-0.4.0 against try#82acd1d76add2232e19c1f0feb250d2a19ec6efe for pr-81213
[INFO] extracting crate number_prefix 0.4.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate number_prefix 0.4.0 on toolchain 82acd1d76add2232e19c1f0feb250d2a19ec6efe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate number_prefix 0.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate number_prefix 0.4.0
[INFO] tweaked toml for crates.io crate number_prefix 0.4.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate number_prefix 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0d799f66e2438d767fdabeea9ef08689708af96d28cf42575ee22a3fbe2a69f
[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" "a0d799f66e2438d767fdabeea9ef08689708af96d28cf42575ee22a3fbe2a69f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0d799f66e2438d767fdabeea9ef08689708af96d28cf42575ee22a3fbe2a69f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0d799f66e2438d767fdabeea9ef08689708af96d28cf42575ee22a3fbe2a69f", kill_on_drop: false }`
[INFO] [stdout] a0d799f66e2438d767fdabeea9ef08689708af96d28cf42575ee22a3fbe2a69f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7fae0255b203bceb823c187bcc8fde3f4934912ce5f118ac52888f66ee4b7431
[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" "7fae0255b203bceb823c187bcc8fde3f4934912ce5f118ac52888f66ee4b7431", kill_on_drop: false }`
[INFO] [stderr]     Checking number_prefix v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "7fae0255b203bceb823c187bcc8fde3f4934912ce5f118ac52888f66ee4b7431", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fae0255b203bceb823c187bcc8fde3f4934912ce5f118ac52888f66ee4b7431", kill_on_drop: false }`
[INFO] [stdout] 7fae0255b203bceb823c187bcc8fde3f4934912ce5f118ac52888f66ee4b7431