[INFO] cloning repository https://github.com/lrlna/ramen-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lrlna/ramen-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flrlna%2Framen-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flrlna%2Framen-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d897faac2bc8568ccc3d8b31945223549a5f395
[INFO] testing lrlna/ramen-rs against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flrlna%2Framen-rs" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lrlna/ramen-rs on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lrlna/ramen-rs
[INFO] finished tweaking git repo https://github.com/lrlna/ramen-rs
[INFO] tweaked toml for git repo https://github.com/lrlna/ramen-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/lrlna/ramen-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbba4909b185cbfb52011dc10857ec5f3a040b8386374e2ebcd3b4e72859d243
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bbba4909b185cbfb52011dc10857ec5f3a040b8386374e2ebcd3b4e72859d243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbba4909b185cbfb52011dc10857ec5f3a040b8386374e2ebcd3b4e72859d243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbba4909b185cbfb52011dc10857ec5f3a040b8386374e2ebcd3b4e72859d243", kill_on_drop: false }`
[INFO] [stdout] bbba4909b185cbfb52011dc10857ec5f3a040b8386374e2ebcd3b4e72859d243
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6ea3650eee1bb3b48e4116a2b7e9499cad7dd51c570960703afaa53170a36f3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d6ea3650eee1bb3b48e4116a2b7e9499cad7dd51c570960703afaa53170a36f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling lazy_static v1.0.2
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling byteorder v1.2.3
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling dtoa v0.4.3
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]    Compiling try_from v0.2.2
[INFO] [stderr]    Compiling linked-hash-map v0.5.1
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling md5 v0.3.7
[INFO] [stderr]    Compiling separator v0.3.1
[INFO] [stderr]    Compiling data-encoding v2.1.1
[INFO] [stderr]    Compiling bufstream v0.1.3
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.8
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling semver v0.8.0
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling rand v0.5.4
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling aho-corasick v0.6.6
[INFO] [stderr]    Compiling syn v0.14.4
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling chrono v0.4.4
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]    Compiling scan_fmt v0.1.3
[INFO] [stderr]    Compiling serde_json v1.0.24
[INFO] [stderr]    Compiling bson v0.12.2
[INFO] [stderr]    Compiling textnonce v0.6.4
[INFO] [stderr]    Compiling mongodb v0.3.9
[INFO] [stderr]    Compiling rust-mongodb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::iter`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::iter;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `&Cities` is not an iterator
[INFO] [stdout]   --> src/main.rs:36:27
[INFO] [stdout]    |
[INFO] [stdout] 36 |         for (key, val) in city {
[INFO] [stdout]    |                           ^^^^ `&Cities` is not an iterator
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::iter::Iterator` is not implemented for `&Cities`
[INFO] [stdout]    = note: required by `std::iter::IntoIterator::into_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-mongodb`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d6ea3650eee1bb3b48e4116a2b7e9499cad7dd51c570960703afaa53170a36f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6ea3650eee1bb3b48e4116a2b7e9499cad7dd51c570960703afaa53170a36f3", kill_on_drop: false }`
[INFO] [stdout] d6ea3650eee1bb3b48e4116a2b7e9499cad7dd51c570960703afaa53170a36f3