[INFO] crate rust-base58 0.0.4 is already in cache
[INFO] extracting crate rust-base58 0.0.4 into work/ex/beta-1.37-6/sources/1.36.0/reg/rust-base58/0.0.4
[INFO] extracting crate rust-base58 0.0.4 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rust-base58/0.0.4
[INFO] validating manifest of rust-base58-0.0.4 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust-base58-0.0.4 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/reg/rust-base58/0.0.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rust-base58-0.0.4 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] d32269c807481b1b7e7d8314c4e06e822deb4f08b384a3874cef99c61ffc1460
[INFO] running `"docker" "start" "-a" "d32269c807481b1b7e7d8314c4e06e822deb4f08b384a3874cef99c61ffc1460"`
[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 0.99s
[INFO] running `"docker" "inspect" "d32269c807481b1b7e7d8314c4e06e822deb4f08b384a3874cef99c61ffc1460"`
[INFO] running `"docker" "rm" "-f" "d32269c807481b1b7e7d8314c4e06e822deb4f08b384a3874cef99c61ffc1460"`
[INFO] [stdout] d32269c807481b1b7e7d8314c4e06e822deb4f08b384a3874cef99c61ffc1460
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0d9a7a3e5a749165f442e48c8afd20fe57e3da904c7f4265d2b5790cdb785cf7
[INFO] running `"docker" "start" "-a" "0d9a7a3e5a749165f442e48c8afd20fe57e3da904c7f4265d2b5790cdb785cf7"`
[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" "0d9a7a3e5a749165f442e48c8afd20fe57e3da904c7f4265d2b5790cdb785cf7"`
[INFO] running `"docker" "rm" "-f" "0d9a7a3e5a749165f442e48c8afd20fe57e3da904c7f4265d2b5790cdb785cf7"`
[INFO] [stdout] 0d9a7a3e5a749165f442e48c8afd20fe57e3da904c7f4265d2b5790cdb785cf7