[INFO] updating cached repository BurntSushi/rust-docs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/BurntSushi/rust-docs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/BurntSushi/rust-docs" "work/ex/beta-1.38-1/sources/1.37.0/gh/BurntSushi/rust-docs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/BurntSushi/rust-docs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/BurntSushi/rust-docs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/BurntSushi/rust-docs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/BurntSushi/rust-docs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 28852fea71fc24a0d53cc2573b255bf677597ac8
[INFO] sha for GitHub repo BurntSushi/rust-docs: 28852fea71fc24a0d53cc2573b255bf677597ac8
[INFO] validating manifest of BurntSushi/rust-docs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of BurntSushi/rust-docs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing BurntSushi/rust-docs
[INFO] finished frobbing BurntSushi/rust-docs
[INFO] frobbed toml for BurntSushi/rust-docs written to work/ex/beta-1.38-1/sources/1.37.0/gh/BurntSushi/rust-docs/Cargo.toml
[INFO] started frobbing BurntSushi/rust-docs
[INFO] finished frobbing BurntSushi/rust-docs
[INFO] frobbed toml for BurntSushi/rust-docs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/BurntSushi/rust-docs/Cargo.toml
[INFO] crate BurntSushi/rust-docs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/BurntSushi/rust-docs/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing BurntSushi/rust-docs against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/BurntSushi/rust-docs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 416c2a9ee952b04efbd36aca0c3339ac0cd3c488d868b442aa759004e2aa6ea6
[INFO] running `"docker" "start" "-a" "416c2a9ee952b04efbd36aca0c3339ac0cd3c488d868b442aa759004e2aa6ea6"`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling suffix v1.1.0
[INFO] [stderr]    Compiling cbor v0.4.1
[INFO] [stderr]    Compiling tabwriter v1.1.0
[INFO] [stderr]    Compiling regex-automata v0.1.8
[INFO] [stderr]    Compiling streaming-stats v0.2.2
[INFO] [stderr]    Compiling fst v0.3.5
[INFO] [stderr]    Compiling chan v0.1.23
[INFO] [stderr]    Compiling chan-signal v0.3.3
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling csv-core v0.1.6
[INFO] [stderr]    Compiling bstr v0.2.7
[INFO] [stderr]    Compiling csv v1.1.1
[INFO] [stderr]    Compiling regex v1.2.1
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling docs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.12s
[INFO] running `"docker" "inspect" "416c2a9ee952b04efbd36aca0c3339ac0cd3c488d868b442aa759004e2aa6ea6"`
[INFO] running `"docker" "rm" "-f" "416c2a9ee952b04efbd36aca0c3339ac0cd3c488d868b442aa759004e2aa6ea6"`
[INFO] [stdout] 416c2a9ee952b04efbd36aca0c3339ac0cd3c488d868b442aa759004e2aa6ea6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/BurntSushi/rust-docs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5f267f843d728912a6f64417f446c8ee25f07509d9451365ebb607ef63e98a28
[INFO] running `"docker" "start" "-a" "5f267f843d728912a6f64417f446c8ee25f07509d9451365ebb607ef63e98a28"`
[INFO] [stderr]    Compiling docs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "5f267f843d728912a6f64417f446c8ee25f07509d9451365ebb607ef63e98a28"`
[INFO] running `"docker" "rm" "-f" "5f267f843d728912a6f64417f446c8ee25f07509d9451365ebb607ef63e98a28"`
[INFO] [stdout] 5f267f843d728912a6f64417f446c8ee25f07509d9451365ebb607ef63e98a28
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/BurntSushi/rust-docs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] a2b3254136604b82ce79661daa272fb4d746e605dea4368cb3669659c7cb5c3b
[INFO] running `"docker" "start" "-a" "a2b3254136604b82ce79661daa272fb4d746e605dea4368cb3669659c7cb5c3b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/docs-6ef627c3cf30b092
[INFO] [stderr]    Doc-tests docs
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "a2b3254136604b82ce79661daa272fb4d746e605dea4368cb3669659c7cb5c3b"`
[INFO] running `"docker" "rm" "-f" "a2b3254136604b82ce79661daa272fb4d746e605dea4368cb3669659c7cb5c3b"`
[INFO] [stdout] a2b3254136604b82ce79661daa272fb4d746e605dea4368cb3669659c7cb5c3b