[INFO] crate mqf 1.0.0 is already in cache
[INFO] checking mqf-1.0.0 against try#d27c6c6a469a28343396a8f3ac1c9d403aabda69 for pr-66037
[INFO] extracting crate mqf 1.0.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mqf 1.0.0 on toolchain d27c6c6a469a28343396a8f3ac1c9d403aabda69
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mqf 1.0.0
[INFO] finished tweaking crates.io crate mqf 1.0.0
[INFO] tweaked toml for crates.io crate mqf 1.0.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "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] 124335be159415767049adc3def208076a7cc42c1d9bf5fc10ba79270bf6d1f2
[INFO] running `"docker" "start" "-a" "124335be159415767049adc3def208076a7cc42c1d9bf5fc10ba79270bf6d1f2"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling bindgen v0.51.1
[INFO] [stderr]    Compiling mqf v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `maximum_count`
[INFO] [stderr]   --> src/raw.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let maximum_count = (1u64 << counter_size) - 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_maximum_count`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `count` is never read
[INFO] [stderr]   --> src/raw.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 |         let mut count = 0;
[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 `count` is never read
[INFO] [stderr]    --> src/lib.rs:158:17
[INFO] [stderr]     |
[INFO] [stderr] 158 |         let mut count = 0;
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:159:13
[INFO] [stderr]     |
[INFO] [stderr] 159 |         let mut fixed_counter = 0;
[INFO] [stderr]     |             ----^^^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:189:13
[INFO] [stderr]     |
[INFO] [stderr] 189 |         let mut count = qf.count_key(100);
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:216:13
[INFO] [stderr]     |
[INFO] [stderr] 216 |         let mut file = tempfile::NamedTempFile::new().unwrap();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/raw.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let mut fixed_counter = 0;
[INFO] [stderr]    |             ----^^^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 17s
[INFO] running `"docker" "inspect" "124335be159415767049adc3def208076a7cc42c1d9bf5fc10ba79270bf6d1f2"`
[INFO] running `"docker" "rm" "-f" "124335be159415767049adc3def208076a7cc42c1d9bf5fc10ba79270bf6d1f2"`
[INFO] [stdout] 124335be159415767049adc3def208076a7cc42c1d9bf5fc10ba79270bf6d1f2