[INFO] updating cached repository https://github.com/gavrielrh/recursion-benchmarking
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f644eff389f2be894220286d15a11328cf141b6
[INFO] checking gavrielrh/recursion-benchmarking against master#1557fb031b272b4c5bfcc7de5df7eddc7b36a584 for pr-73166
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgavrielrh%2Frecursion-benchmarking" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gavrielrh/recursion-benchmarking on toolchain 1557fb031b272b4c5bfcc7de5df7eddc7b36a584
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gavrielrh/recursion-benchmarking
[INFO] finished tweaking git repo https://github.com/gavrielrh/recursion-benchmarking
[INFO] tweaked toml for git repo https://github.com/gavrielrh/recursion-benchmarking written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/gavrielrh/recursion-benchmarking already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5998158a5bd674b6f15d2b11871d270eb90ef6379e25a5d44e72566ceb351664
[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" "5998158a5bd674b6f15d2b11871d270eb90ef6379e25a5d44e72566ceb351664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5998158a5bd674b6f15d2b11871d270eb90ef6379e25a5d44e72566ceb351664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5998158a5bd674b6f15d2b11871d270eb90ef6379e25a5d44e72566ceb351664", kill_on_drop: false }`
[INFO] [stdout] 5998158a5bd674b6f15d2b11871d270eb90ef6379e25a5d44e72566ceb351664
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1557fb031b272b4c5bfcc7de5df7eddc7b36a584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 751a4c15137302eaf8e38d28459b74f50f23b99d15dad4a02b186cccd9ac22a7
[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" "751a4c15137302eaf8e38d28459b74f50f23b99d15dad4a02b186cccd9ac22a7", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking recursion v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use rand::Rng;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use rand::Rng;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:181:32
[INFO] [stdout]     |
[INFO] [stdout] 181 | ...                   why.description()),
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:189:52
[INFO] [stdout]     |
[INFO] [stdout] 189 | ...                   why.description())
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:203:49
[INFO] [stdout]     |
[INFO] [stdout] 203 | ...                   why.description()),
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:210:49
[INFO] [stdout]     |
[INFO] [stdout] 210 | ...                   why.description()),
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:181:32
[INFO] [stdout]     |
[INFO] [stdout] 181 | ...                   why.description()),
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 3..(n+1) {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/main.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     let mut v: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |     for i in 0..len {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]    --> src/main.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     let mut data: Vec<i32> = Vec::new();
[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: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:230:17
[INFO] [stdout]     |
[INFO] [stdout] 230 |             let n = a.len() as i32;
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:241:17
[INFO] [stdout]     |
[INFO] [stdout] 241 |             let n = a.len() as i32;
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:189:52
[INFO] [stdout]     |
[INFO] [stdout] 189 | ...                   why.description())
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:203:49
[INFO] [stdout]     |
[INFO] [stdout] 203 | ...                   why.description()),
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stdout]    --> src/main.rs:210:49
[INFO] [stdout]     |
[INFO] [stdout] 210 | ...                   why.description()),
[INFO] [stdout]     |                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 3..(n+1) {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/main.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     let mut v: Vec<i32> = Vec::new();
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |     for i in 0..len {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `data` is never read
[INFO] [stdout]    --> src/main.rs:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     let mut data: Vec<i32> = Vec::new();
[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]    --> src/main.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     let mut v: Vec<i32> = Vec::new();
[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: `get_sort_time`
[INFO] [stdout]   --> src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn get_sort_time(mut v: Vec<i32>, f: fn(&mut Vec<i32>)) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_fibo_time`
[INFO] [stdout]   --> src/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn get_fibo_time(n: u64, f: fn(u64) -> u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_test_vec_files`
[INFO] [stdout]    --> src/main.rs:139:4
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn make_test_vec_files(start: i32, end: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `pick`
[INFO] [stdout]    --> src/main.rs:155:4
[INFO] [stdout]     |
[INFO] [stdout] 155 | fn pick(a: i32, b: i32) -> i32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_rand_vector`
[INFO] [stdout]    --> src/main.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn get_rand_vector(len: usize) -> Vec<i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |     let mut v: Vec<i32> = Vec::new();
[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: `save_vec_to_file`
[INFO] [stdout]    --> src/main.rs:171:4
[INFO] [stdout]     |
[INFO] [stdout] 171 | fn save_vec_to_file(v: Vec<i32>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_sort_time`
[INFO] [stdout]   --> src/main.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn get_sort_time(mut v: Vec<i32>, f: fn(&mut Vec<i32>)) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_fibo_time`
[INFO] [stdout]   --> src/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn get_fibo_time(n: u64, f: fn(u64) -> u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_test_vec_files`
[INFO] [stdout]    --> src/main.rs:139:4
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn make_test_vec_files(start: i32, end: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `pick`
[INFO] [stdout]    --> src/main.rs:155:4
[INFO] [stdout]     |
[INFO] [stdout] 155 | fn pick(a: i32, b: i32) -> i32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_rand_vector`
[INFO] [stdout]    --> src/main.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn get_rand_vector(len: usize) -> Vec<i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `save_vec_to_file`
[INFO] [stdout]    --> src/main.rs:171:4
[INFO] [stdout]     |
[INFO] [stdout] 171 | fn save_vec_to_file(v: Vec<i32>) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_vector_from_file`
[INFO] [stdout]    --> src/main.rs:196:4
[INFO] [stdout]     |
[INFO] [stdout] 196 | fn read_vector_from_file(p: &str) -> Vec<i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.71s
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "751a4c15137302eaf8e38d28459b74f50f23b99d15dad4a02b186cccd9ac22a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "751a4c15137302eaf8e38d28459b74f50f23b99d15dad4a02b186cccd9ac22a7", kill_on_drop: false }`
[INFO] [stdout] 751a4c15137302eaf8e38d28459b74f50f23b99d15dad4a02b186cccd9ac22a7