[INFO] fetching crate png 0.17.5...
[INFO] documenting png-0.17.5 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate png 0.17.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate png 0.17.5 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate png 0.17.5
[INFO] finished tweaking crates.io crate png 0.17.5
[INFO] tweaked toml for crates.io crate png 0.17.5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate png 0.17.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c0fc7910a8b1551dd2125919a472acaed6c6fb9aed853b3bbc260a44f29f0209
[INFO] running `Command { std: "docker" "start" "-a" "c0fc7910a8b1551dd2125919a472acaed6c6fb9aed853b3bbc260a44f29f0209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0fc7910a8b1551dd2125919a472acaed6c6fb9aed853b3bbc260a44f29f0209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0fc7910a8b1551dd2125919a472acaed6c6fb9aed853b3bbc260a44f29f0209", kill_on_drop: false }`
[INFO] [stdout] c0fc7910a8b1551dd2125919a472acaed6c6fb9aed853b3bbc260a44f29f0209
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8923ed17f56fc73069b4b2ac9c90e73d0718637987f6f9f264ec5a39e9daf01f
[INFO] running `Command { std: "docker" "start" "-a" "8923ed17f56fc73069b4b2ac9c90e73d0718637987f6f9f264ec5a39e9daf01f", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]     Checking crc32fast v1.3.2
[INFO] [stderr]  Documenting png v0.17.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "8923ed17f56fc73069b4b2ac9c90e73d0718637987f6f9f264ec5a39e9daf01f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8923ed17f56fc73069b4b2ac9c90e73d0718637987f6f9f264ec5a39e9daf01f", kill_on_drop: false }`
[INFO] [stdout] 8923ed17f56fc73069b4b2ac9c90e73d0718637987f6f9f264ec5a39e9daf01f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 6cfad6dffaea3cafa344257f5ae226bf789d261bb0343c6fbfc9fb264077411d
[INFO] running `Command { std: "docker" "start" "-a" "6cfad6dffaea3cafa344257f5ae226bf789d261bb0343c6fbfc9fb264077411d", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]  Documenting png v0.17.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.47s
[INFO] running `Command { std: "docker" "inspect" "6cfad6dffaea3cafa344257f5ae226bf789d261bb0343c6fbfc9fb264077411d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cfad6dffaea3cafa344257f5ae226bf789d261bb0343c6fbfc9fb264077411d", kill_on_drop: false }`
[INFO] [stdout] 6cfad6dffaea3cafa344257f5ae226bf789d261bb0343c6fbfc9fb264077411d