[INFO] fetching crate semververfork 0.1.64...
[INFO] documenting semververfork-0.1.64 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate semververfork 0.1.64 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate semververfork 0.1.64 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate semververfork 0.1.64
[INFO] finished tweaking crates.io crate semververfork 0.1.64
[INFO] tweaked toml for crates.io crate semververfork 0.1.64 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate semververfork 0.1.64 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crates-io v0.32.0
[INFO] [stderr]   Downloaded cargo v0.45.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da395fbe18041b8b7ba745c6135a3eca5885f81ad915ba119b2cb5c57f75f6b8
[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" "da395fbe18041b8b7ba745c6135a3eca5885f81ad915ba119b2cb5c57f75f6b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da395fbe18041b8b7ba745c6135a3eca5885f81ad915ba119b2cb5c57f75f6b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da395fbe18041b8b7ba745c6135a3eca5885f81ad915ba119b2cb5c57f75f6b8", kill_on_drop: false }`
[INFO] [stdout] da395fbe18041b8b7ba745c6135a3eca5885f81ad915ba119b2cb5c57f75f6b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf67e5bb14e2599a74813336e1b419f7888f0824a56bd2915034b8c518c28025
[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" "bf67e5bb14e2599a74813336e1b419f7888f0824a56bd2915034b8c518c28025", kill_on_drop: false }`
[INFO] [stderr]    Compiling curl v0.4.30
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]    Compiling semververfork v0.1.64 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking home v0.5.3
[INFO] [stderr]     Checking shell-escape v0.1.5
[INFO] [stderr]     Checking opener v0.4.1
[INFO] [stderr]     Checking humantime v2.0.1
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]     Checking bytesize v1.0.1
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]     Checking semver v0.10.0
[INFO] [stderr]     Checking strip-ansi-escapes v0.1.0
[INFO] [stderr]     Checking filetime v0.2.10
[INFO] [stderr]     Checking jobserver v0.1.21
[INFO] [stderr]    Compiling cc v1.0.56
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking cargo-platform v0.1.1
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking serde_ignored v0.1.2
[INFO] [stderr]     Checking tar v0.4.29
[INFO] [stderr]     Checking ignore v0.4.16
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.4+1.41.0
[INFO] [stderr]    Compiling curl-sys v0.4.32+curl-7.70.0
[INFO] [stderr]    Compiling libssh2-sys v0.2.18
[INFO] [stderr]    Compiling libgit2-sys v0.12.7+1.0.0
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]     Checking rustfix v0.5.1
[INFO] [stderr]     Checking crypto-hash v0.3.4
[INFO] [stderr]     Checking crates-io v0.31.0
[INFO] [stderr]     Checking crates-io v0.32.0
[INFO] [stderr]     Checking git2 v0.13.6
[INFO] [stderr]     Checking git2-curl v0.14.0
[INFO] [stderr]     Checking cargo v0.45.1
[INFO] [stderr]  Documenting semververfork v0.1.64 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `rustc_ast`
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate rustc_ast;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `semververfork`.
[INFO] [stdout] error[E0463]: can't find crate for `rustc_ast`
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate rustc_ast;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name semververfork src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-70b362b0d3f6c020.rmeta --extern cargo=/opt/rustwide/target/debug/deps/libcargo-c3f1e1d1aa0e726b.rmeta --extern crates_io=/opt/rustwide/target/debug/deps/libcrates_io-3dec9592f03a8d51.rmeta --extern curl=/opt/rustwide/target/debug/deps/libcurl-c0f83946c5fd2ea1.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-c52ab2b35aa94c57.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-69d9a7f018cb28c7.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-576a095d0832a68a.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-c38880f5f03aa648.rmeta --extern semver=/opt/rustwide/target/debug/deps/libsemver-f5f24d68d1af3282.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-71f0b559cd912a2d.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-c6782078322b6754.rmeta --cap-lints=warn --crate-version 0.1.64` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bf67e5bb14e2599a74813336e1b419f7888f0824a56bd2915034b8c518c28025", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf67e5bb14e2599a74813336e1b419f7888f0824a56bd2915034b8c518c28025", kill_on_drop: false }`
[INFO] [stdout] bf67e5bb14e2599a74813336e1b419f7888f0824a56bd2915034b8c518c28025