[INFO] fetching crate wavelet-matrix 0.4.7...
[INFO] checking wavelet-matrix-0.4.7 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate wavelet-matrix 0.4.7 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate wavelet-matrix 0.4.7 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wavelet-matrix 0.4.7
[INFO] finished tweaking crates.io crate wavelet-matrix 0.4.7
[INFO] tweaked toml for crates.io crate wavelet-matrix 0.4.7 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded easybench v0.1.4
[INFO] [stderr]   Downloaded succinct v0.4.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0aaaae84525b4e26e5edeb7ea808a087ef05a30e426c512c19e931019bc72dac
[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" "0aaaae84525b4e26e5edeb7ea808a087ef05a30e426c512c19e931019bc72dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0aaaae84525b4e26e5edeb7ea808a087ef05a30e426c512c19e931019bc72dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0aaaae84525b4e26e5edeb7ea808a087ef05a30e426c512c19e931019bc72dac", kill_on_drop: false }`
[INFO] [stdout] 0aaaae84525b4e26e5edeb7ea808a087ef05a30e426c512c19e931019bc72dac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc87c0db6a6b025379eba0ae628994be6c5014f1e99fbe2f8fac3f34c8a160df
[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" "fc87c0db6a6b025379eba0ae628994be6c5014f1e99fbe2f8fac3f34c8a160df", kill_on_drop: false }`
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking easybench v0.1.4
[INFO] [stderr]     Checking succinct v0.4.4
[INFO] [stderr]     Checking wavelet-matrix v0.4.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `limit_secs`
[INFO] [stdout]   --> benches/easybench.rs:57:55
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn overall_helper(num: usize, desc: &str, upper: u64, limit_secs: u64) {
[INFO] [stdout]    |                                                       ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_limit_secs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `errorpct` is never read
[INFO] [stdout]    --> benches/easybench.rs:332:9
[INFO] [stdout]     |
[INFO] [stdout] 332 |     let mut errorpct = 0.0;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> benches/easybench.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let mut rng = rand::weak_rng();
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `statstical_helper`
[INFO] [stdout]    --> benches/easybench.rs:264:4
[INFO] [stdout]     |
[INFO] [stdout] 264 | fn statstical_helper(num: usize, lower: u64, upper: u64, k: usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sum_uniform_find_sufficient_k`
[INFO] [stdout]    --> benches/easybench.rs:330:4
[INFO] [stdout]     |
[INFO] [stdout] 330 | fn sum_uniform_find_sufficient_k(num: usize, lower: u64, upper: u64, accuracy_pct: f64) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `average`
[INFO] [stdout]    --> benches/easybench.rs:373:4
[INFO] [stdout]     |
[INFO] [stdout] 373 | fn average(r: &std::ops::Range<u64>) -> u64 {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `error_pct`
[INFO] [stdout]    --> benches/easybench.rs:377:4
[INFO] [stdout]     |
[INFO] [stdout] 377 | fn error_pct(computed: u64, actual: u64) -> f64 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `statistical_performance`
[INFO] [stdout]    --> benches/easybench.rs:392:4
[INFO] [stdout]     |
[INFO] [stdout] 392 | fn statistical_performance() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `statistical_sufficient_k`
[INFO] [stdout]    --> benches/easybench.rs:421:4
[INFO] [stdout]     |
[INFO] [stdout] 421 | fn statistical_sufficient_k() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.58s
[INFO] running `Command { std: "docker" "inspect" "fc87c0db6a6b025379eba0ae628994be6c5014f1e99fbe2f8fac3f34c8a160df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc87c0db6a6b025379eba0ae628994be6c5014f1e99fbe2f8fac3f34c8a160df", kill_on_drop: false }`
[INFO] [stdout] fc87c0db6a6b025379eba0ae628994be6c5014f1e99fbe2f8fac3f34c8a160df