[INFO] updating cached repository infinityb/gist-randbench
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/infinityb/gist-randbench
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/infinityb/gist-randbench" "work/ex/beta-1.38-1/sources/1.37.0/gh/infinityb/gist-randbench"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/infinityb/gist-randbench'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/infinityb/gist-randbench" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/infinityb/gist-randbench"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/infinityb/gist-randbench'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a729145bea00ac560cf2a64249605585cfacbc44
[INFO] sha for GitHub repo infinityb/gist-randbench: a729145bea00ac560cf2a64249605585cfacbc44
[INFO] validating manifest of infinityb/gist-randbench 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 infinityb/gist-randbench 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 infinityb/gist-randbench
[INFO] finished frobbing infinityb/gist-randbench
[INFO] frobbed toml for infinityb/gist-randbench written to work/ex/beta-1.38-1/sources/1.37.0/gh/infinityb/gist-randbench/Cargo.toml
[INFO] started frobbing infinityb/gist-randbench
[INFO] finished frobbing infinityb/gist-randbench
[INFO] frobbed toml for infinityb/gist-randbench written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/infinityb/gist-randbench/Cargo.toml
[INFO] crate infinityb/gist-randbench 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/infinityb/gist-randbench/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[INFO] the lockfile is outdated, regenerating it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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing infinityb/gist-randbench against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/infinityb/gist-randbench:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 7fe6e78b568488cbe21eee11dc7d7fd86066b0d60175ff5db822c237f8b7d4c4
[INFO] running `"docker" "start" "-a" "7fe6e78b568488cbe21eee11dc7d7fd86066b0d60175ff5db822c237f8b7d4c4"`
[INFO] [stderr]    Compiling getrandom v0.1.10
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling randbench v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `rand::XorShiftRng`
[INFO] [stderr]  --> src/main.rs:5:17
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rand::{Rng, XorShiftRng};
[INFO] [stderr]   |                 ^^^^^^^^^^^ no `XorShiftRng` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(std_misc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `span` found for type `std::time::Duration` in the current scope
[INFO] [stderr]   --> src/main.rs:19:50
[INFO] [stderr]    |
[INFO] [stderr] 19 |     println!("took {} to fill buffer", Duration::span(|| {
[INFO] [stderr]    |                                                  ^^^^ function or associated item not found in `std::time::Duration`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `randbench`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7fe6e78b568488cbe21eee11dc7d7fd86066b0d60175ff5db822c237f8b7d4c4"`
[INFO] running `"docker" "rm" "-f" "7fe6e78b568488cbe21eee11dc7d7fd86066b0d60175ff5db822c237f8b7d4c4"`
[INFO] [stdout] 7fe6e78b568488cbe21eee11dc7d7fd86066b0d60175ff5db822c237f8b7d4c4