[INFO] updating cached repository https://github.com/samdemorest/rsa_keygen
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7e3894cc9568c39a6276d0626e8eb4b280ea8134
[INFO] testing samdemorest/rsa_keygen against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamdemorest%2Frsa_keygen" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samdemorest/rsa_keygen on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/samdemorest/rsa_keygen
[INFO] finished tweaking git repo https://github.com/samdemorest/rsa_keygen
[INFO] tweaked toml for git repo https://github.com/samdemorest/rsa_keygen written to work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/samdemorest/rsa_keygen already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /big/crater/work/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] ba857296d6f0dde28ece0ff00863b32cb024811ce5fc50e5192466a1544926ad
[INFO] running `"docker" "start" "-a" "ba857296d6f0dde28ece0ff00863b32cb024811ce5fc50e5192466a1544926ad"`
[INFO] [stderr]    Compiling rsa_keygen v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `num::bigint::RandBigInt`
[INFO] [stderr]  --> src/prime.rs:8:28
[INFO] [stderr]   |
[INFO] [stderr] 8 | use num::bigint::{BigUint, RandBigInt};
[INFO] [stderr]   |                            ^^^^^^^^^^ no `RandBigInt` in `bigint`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `OsRng` in `rand`
[INFO] [stderr]   --> src/prime.rs:15:29
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let mut rnjesus = rand::OsRng::new().unwrap();
[INFO] [stderr]    |                             ^^^^^ could not find `OsRng` in `rand`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `OsRng` in `rand`
[INFO] [stderr]   --> src/prime.rs:43:29
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let mut rnjesus = rand::OsRng::new().unwrap();
[INFO] [stderr]    |                             ^^^^^ could not find `OsRng` in `rand`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/prime.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(core)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0433, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `rsa_keygen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ba857296d6f0dde28ece0ff00863b32cb024811ce5fc50e5192466a1544926ad"`
[INFO] running `"docker" "rm" "-f" "ba857296d6f0dde28ece0ff00863b32cb024811ce5fc50e5192466a1544926ad"`
[INFO] [stdout] ba857296d6f0dde28ece0ff00863b32cb024811ce5fc50e5192466a1544926ad