[INFO] updating cached repository https://github.com/jeffrey-xiao/hash-rings-rs
[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] 59ee8bef06dfca66875176af00ddc7a3bce05256
[INFO] testing jeffrey-xiao/hash-rings-rs against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffrey-xiao%2Fhash-rings-rs" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeffrey-xiao/hash-rings-rs on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jeffrey-xiao/hash-rings-rs
[INFO] finished tweaking git repo https://github.com/jeffrey-xiao/hash-rings-rs
[INFO] tweaked toml for git repo https://github.com/jeffrey-xiao/hash-rings-rs written to work/builds/worker-5/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 627fecc069eda6c074fb6977fea73cb319b7af2d1e2c06681cca3c59f5f7c826
[INFO] running `"docker" "start" "-a" "627fecc069eda6c074fb6977fea73cb319b7af2d1e2c06681cca3c59f5f7c826"`
[INFO] [stderr]    Compiling primal-estimate v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling primal-bit v0.2.4
[INFO] [stderr]    Compiling primal-sieve v0.2.9
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling primal-check v0.2.3
[INFO] [stderr]    Compiling primal v0.2.3
[INFO] [stderr]    Compiling hash-rings v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::boxed::Box<std::iter::Map<std::collections::hash_map::Iter<'_, &T, std::collections::HashSet<&U>>, [closure@src/weighted_rendezvous.rs:483:40: 486:10]>>: std::iter::Iterator`
[INFO] [stderr]    --> src/weighted_rendezvous.rs:482:30
[INFO] [stderr]     |
[INFO] [stderr] 482 |     pub fn iter(&'a self) -> impl Iterator<Item = (&'a T, Vec<&'a U>)> {
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: the return type of a function must have a statically known size
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0283`.
[INFO] [stderr] error: Could not compile `hash-rings`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "627fecc069eda6c074fb6977fea73cb319b7af2d1e2c06681cca3c59f5f7c826"`
[INFO] running `"docker" "rm" "-f" "627fecc069eda6c074fb6977fea73cb319b7af2d1e2c06681cca3c59f5f7c826"`
[INFO] [stdout] 627fecc069eda6c074fb6977fea73cb319b7af2d1e2c06681cca3c59f5f7c826