[INFO] crate rust-base58 0.0.4 is already in cache
[INFO] extracting crate rust-base58 0.0.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/rust-base58/0.0.4
[INFO] extracting crate rust-base58 0.0.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-base58/0.0.4
[INFO] validating manifest of rust-base58-0.0.4 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 rust-base58-0.0.4 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 rust-base58-0.0.4
[INFO] finished frobbing rust-base58-0.0.4
[INFO] frobbed toml for rust-base58-0.0.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rust-base58/0.0.4/Cargo.toml
[INFO] started frobbing rust-base58-0.0.4
[INFO] finished frobbing rust-base58-0.0.4
[INFO] frobbed toml for rust-base58-0.0.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-base58/0.0.4/Cargo.toml
[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 rust-base58-0.0.4 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-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-base58/0.0.4:/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] 5736fac4b6157017c344921d3f318f0a645b30efa27ce16506849f315abd58f5
[INFO] running `"docker" "start" "-a" "5736fac4b6157017c344921d3f318f0a645b30efa27ce16506849f315abd58f5"`
[INFO] [stderr]    Compiling rust-base58 v0.0.4 (/opt/crater/workdir)
[INFO] [stderr] warning: static item is never used: `FLICKR_ALPHA`
[INFO] [stderr]   --> src/base58.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | / static FLICKR_ALPHA: &'static[u8] = b"123456789\
[INFO] [stderr] 13 | |                                       abcdefghijkmnopqrstuvwxyz\
[INFO] [stderr] 14 | |                                       ABCDEFGHJKLMNPQRSTUVWXYZ";
[INFO] [stderr]    | |________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "5736fac4b6157017c344921d3f318f0a645b30efa27ce16506849f315abd58f5"`
[INFO] running `"docker" "rm" "-f" "5736fac4b6157017c344921d3f318f0a645b30efa27ce16506849f315abd58f5"`
[INFO] [stdout] 5736fac4b6157017c344921d3f318f0a645b30efa27ce16506849f315abd58f5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust-base58/0.0.4:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8883f6a5b0138438177972a6311cfe210b0d7b7669eec15a19581e296753757f
[INFO] running `"docker" "start" "-a" "8883f6a5b0138438177972a6311cfe210b0d7b7669eec15a19581e296753757f"`
[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 rust-base58 v0.0.4 (/opt/crater/workdir)
[INFO] [stderr] error[E0599]: no method named `gen_iter` found for type `rand::prelude::ThreadRng` in the current scope
[INFO] [stderr]    --> src/base58.rs:201:34
[INFO] [stderr]     |
[INFO] [stderr] 201 |             let v = thread_rng().gen_iter::<u8>().take(times)
[INFO] [stderr]     |                                  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `rust-base58`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8883f6a5b0138438177972a6311cfe210b0d7b7669eec15a19581e296753757f"`
[INFO] running `"docker" "rm" "-f" "8883f6a5b0138438177972a6311cfe210b0d7b7669eec15a19581e296753757f"`
[INFO] [stdout] 8883f6a5b0138438177972a6311cfe210b0d7b7669eec15a19581e296753757f