[INFO] fetching crate v_jsonescape 0.5.0...
[INFO] checking v_jsonescape-0.5.0 against master#4fa76a4a7742bb9c1febe33019f5a9e7e4839a65 for pr-83744
[INFO] extracting crate v_jsonescape 0.5.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate v_jsonescape 0.5.0 on toolchain 4fa76a4a7742bb9c1febe33019f5a9e7e4839a65
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate v_jsonescape 0.5.0
[INFO] finished tweaking crates.io crate v_jsonescape 0.5.0
[INFO] tweaked toml for crates.io crate v_jsonescape 0.5.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "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" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3b459aca8944fe824d72b72a2d7281cd735cf7decd678918f6d6bd13547cee6
[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" "f3b459aca8944fe824d72b72a2d7281cd735cf7decd678918f6d6bd13547cee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3b459aca8944fe824d72b72a2d7281cd735cf7decd678918f6d6bd13547cee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3b459aca8944fe824d72b72a2d7281cd735cf7decd678918f6d6bd13547cee6", kill_on_drop: false }`
[INFO] [stdout] f3b459aca8944fe824d72b72a2d7281cd735cf7decd678918f6d6bd13547cee6
[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" "+4fa76a4a7742bb9c1febe33019f5a9e7e4839a65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 288f95b0ea0dfb07a39477d772f9edf7b61f92594b1f62c32d09f5313d3ef6d3
[INFO] running `Command { std: "docker" "start" "-a" "288f95b0ea0dfb07a39477d772f9edf7b61f92594b1f62c32d09f5313d3ef6d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling v_escape v0.16.0
[INFO] [stderr]    Compiling v_jsonescape v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking buf-min v0.5.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling v_escape_derive v0.8.4
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.86s
[INFO] running `Command { std: "docker" "inspect" "288f95b0ea0dfb07a39477d772f9edf7b61f92594b1f62c32d09f5313d3ef6d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "288f95b0ea0dfb07a39477d772f9edf7b61f92594b1f62c32d09f5313d3ef6d3", kill_on_drop: false }`
[INFO] [stdout] 288f95b0ea0dfb07a39477d772f9edf7b61f92594b1f62c32d09f5313d3ef6d3