[INFO] fetching crate extract-frontmatter 2.0.3...
[INFO] checking extract-frontmatter-2.0.3 against try#bb9dbf1d07454a99066eabaabd5819851281494b for pr-80920
[INFO] extracting crate extract-frontmatter 2.0.3 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate extract-frontmatter 2.0.3 on toolchain bb9dbf1d07454a99066eabaabd5819851281494b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate extract-frontmatter 2.0.3
[INFO] finished tweaking crates.io crate extract-frontmatter 2.0.3
[INFO] tweaked toml for crates.io crate extract-frontmatter 2.0.3 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c7455bf098a312e220d1279b914610137ff3be9e5e5bded9c075c181e341cf4
[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" "0c7455bf098a312e220d1279b914610137ff3be9e5e5bded9c075c181e341cf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c7455bf098a312e220d1279b914610137ff3be9e5e5bded9c075c181e341cf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c7455bf098a312e220d1279b914610137ff3be9e5e5bded9c075c181e341cf4", kill_on_drop: false }`
[INFO] [stdout] 0c7455bf098a312e220d1279b914610137ff3be9e5e5bded9c075c181e341cf4
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e8f06fbeab4235a8405f600d8a2833f538f96f6dd8d18d753d11faa8bbd9853
[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" "6e8f06fbeab4235a8405f600d8a2833f538f96f6dd8d18d753d11faa8bbd9853", kill_on_drop: false }`
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking extract-frontmatter v2.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking form_urlencoded v1.0.0
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking tinyvec v1.1.0
[INFO] [stderr]     Checking pulldown-cmark v0.7.2
[INFO] [stderr]     Checking quote v1.0.8
[INFO] [stderr]     Checking unicode-normalization v0.1.16
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking version-sync v0.9.1
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.98s
[INFO] running `Command { std: "docker" "inspect" "6e8f06fbeab4235a8405f600d8a2833f538f96f6dd8d18d753d11faa8bbd9853", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e8f06fbeab4235a8405f600d8a2833f538f96f6dd8d18d753d11faa8bbd9853", kill_on_drop: false }`
[INFO] [stdout] 6e8f06fbeab4235a8405f600d8a2833f538f96f6dd8d18d753d11faa8bbd9853