[INFO] fetching crate extract-frontmatter 2.0.3...
[INFO] testing extract-frontmatter-2.0.3 against 1.49.0 for beta-1.50-1
[INFO] extracting crate extract-frontmatter 2.0.3 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate extract-frontmatter 2.0.3 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5258ecdc5084da8abda1b8742993ce97ddf98d11875cbe3cc5bdb59a7d8305c
[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" "b5258ecdc5084da8abda1b8742993ce97ddf98d11875cbe3cc5bdb59a7d8305c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5258ecdc5084da8abda1b8742993ce97ddf98d11875cbe3cc5bdb59a7d8305c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5258ecdc5084da8abda1b8742993ce97ddf98d11875cbe3cc5bdb59a7d8305c", kill_on_drop: false }`
[INFO] [stdout] b5258ecdc5084da8abda1b8742993ce97ddf98d11875cbe3cc5bdb59a7d8305c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--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] bec918b8fa9a43a1d7dc321ec1c9f7b173634b6f2b92ff7cfe447d2b2ca1d495
[INFO] running `Command { std: "docker" "start" "-a" "bec918b8fa9a43a1d7dc321ec1c9f7b173634b6f2b92ff7cfe447d2b2ca1d495", kill_on_drop: false }`
[INFO] [stderr]    Compiling extract-frontmatter v2.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "bec918b8fa9a43a1d7dc321ec1c9f7b173634b6f2b92ff7cfe447d2b2ca1d495", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bec918b8fa9a43a1d7dc321ec1c9f7b173634b6f2b92ff7cfe447d2b2ca1d495", kill_on_drop: false }`
[INFO] [stdout] bec918b8fa9a43a1d7dc321ec1c9f7b173634b6f2b92ff7cfe447d2b2ca1d495
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--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] 42463168ec154971e9a708c53878d9142cda922372457a788eccb6374c53d490
[INFO] running `Command { std: "docker" "start" "-a" "42463168ec154971e9a708c53878d9142cda922372457a788eccb6374c53d490", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling version-sync v0.9.1
[INFO] [stderr]    Compiling extract-frontmatter v2.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 22.22s
[INFO] running `Command { std: "docker" "inspect" "42463168ec154971e9a708c53878d9142cda922372457a788eccb6374c53d490", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42463168ec154971e9a708c53878d9142cda922372457a788eccb6374c53d490", kill_on_drop: false }`
[INFO] [stdout] 42463168ec154971e9a708c53878d9142cda922372457a788eccb6374c53d490
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d679b406f75fd5bc0d7de724297fd2dfdec6620739a28aa9c87df32f5692a6af
[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" "d679b406f75fd5bc0d7de724297fd2dfdec6620739a28aa9c87df32f5692a6af", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/extract_frontmatter-09783f4b3222efa3
[INFO] [stdout] test modifier::tests::ordering ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/modifier-130fb59978b81ad0
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test discard_first_and_last_lines ... ok
[INFO] [stdout] test strip_prefix_and_whitespace ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/selector-524f007a2ef8f784
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test select_all ... ok
[INFO] [stdout] test select_by_line_count ... ok
[INFO] [stdout] test select_by_prefix ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/version-326e0c0ed8c181a7
[INFO] [stdout] test select_by_terminator ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test html_root_url ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests extract-frontmatter
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 39) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d679b406f75fd5bc0d7de724297fd2dfdec6620739a28aa9c87df32f5692a6af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d679b406f75fd5bc0d7de724297fd2dfdec6620739a28aa9c87df32f5692a6af", kill_on_drop: false }`
[INFO] [stdout] d679b406f75fd5bc0d7de724297fd2dfdec6620739a28aa9c87df32f5692a6af