[INFO] crate frank 0.1.3 is already in cache
[INFO] checking frank-0.1.3 against master#b61e69433951e31f7bd746e22f516a48ad41623b for prs-64470-and-65389
[INFO] extracting crate frank 0.1.3 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate frank 0.1.3 on toolchain b61e69433951e31f7bd746e22f516a48ad41623b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate frank 0.1.3
[INFO] finished tweaking crates.io crate frank 0.1.3
[INFO] tweaked toml for crates.io crate frank 0.1.3 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "/opt/rustwide/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9a2a5ba5882d95cf660454e02f53ecad41aca6113bce4b039d83fabe3e631764
[INFO] running `"docker" "start" "-a" "9a2a5ba5882d95cf660454e02f53ecad41aca6113bce4b039d83fabe3e631764"`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking frank v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `remains` is never read
[INFO] [stderr]    --> src/lib.rs:415:13
[INFO] [stderr]     |
[INFO] [stderr] 415 |     let mut remains: i128 = 0; //code works as intended despite "never used" warning here for Rust 2018 v 1.33-nightly.  Play that fiddle.  Keep this line.  Dancing in an iffy lifetime.
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `remains` is never read
[INFO] [stderr]    --> src/lib.rs:415:13
[INFO] [stderr]     |
[INFO] [stderr] 415 |     let mut remains: i128 = 0; //code works as intended despite "never used" warning here for Rust 2018 v 1.33-nightly.  Play that fiddle.  Keep this line.  Dancing in an iffy lifetime.
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `remains` is never read
[INFO] [stderr]    --> src/main.rs:415:13
[INFO] [stderr]     |
[INFO] [stderr] 415 |     let mut remains: i128 = 0; //code works as intended despite "never used" warning here for Rust 2018 v 1.33-nightly.  Play that fiddle.  Keep this line.  Dancing in an iffy lifetime.
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rcl`
[INFO] [stderr]    --> src/main.rs:489:9
[INFO] [stderr]     |
[INFO] [stderr] 489 |     let rcl = rank_count_lesser(&spinning);
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_rcl`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `remains` is never read
[INFO] [stderr]    --> src/main.rs:415:13
[INFO] [stderr]     |
[INFO] [stderr] 415 |     let mut remains: i128 = 0; //code works as intended despite "never used" warning here for Rust 2018 v 1.33-nightly.  Play that fiddle.  Keep this line.  Dancing in an iffy lifetime.
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rcl`
[INFO] [stderr]    --> src/main.rs:489:9
[INFO] [stderr]     |
[INFO] [stderr] 489 |     let rcl = rank_count_lesser(&spinning);
[INFO] [stderr]     |         ^^^ help: consider prefixing with an underscore: `_rcl`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 6.43s
[INFO] running `"docker" "inspect" "9a2a5ba5882d95cf660454e02f53ecad41aca6113bce4b039d83fabe3e631764"`
[INFO] running `"docker" "rm" "-f" "9a2a5ba5882d95cf660454e02f53ecad41aca6113bce4b039d83fabe3e631764"`
[INFO] [stdout] 9a2a5ba5882d95cf660454e02f53ecad41aca6113bce4b039d83fabe3e631764