[INFO] updating cached repository https://github.com/suhanyujie/rust-cookbook-note
[INFO] running `"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"`
[INFO] [stderr] From https://github.com/suhanyujie/rust-cookbook-note
[INFO] [stderr]    f266548..e53e76a  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e53e76ad02992a3c92718bc0fa9542473f8ab648
[INFO] checking suhanyujie/rust-cookbook-note against master#914adf04af1c1a984707f778da3d04590c03d144 for pr-72331
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Frust-cookbook-note" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/suhanyujie/rust-cookbook-note on toolchain 914adf04af1c1a984707f778da3d04590c03d144
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/suhanyujie/rust-cookbook-note
[INFO] finished tweaking git repo https://github.com/suhanyujie/rust-cookbook-note
[INFO] tweaked toml for git repo https://github.com/suhanyujie/rust-cookbook-note written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/suhanyujie/rust-cookbook-note already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+914adf04af1c1a984707f778da3d04590c03d144" "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-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" "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" "+914adf04af1c1a984707f778da3d04590c03d144" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] abaf01b813feab789660f33db1da5ce57a07d776c59ace56a7ea8fae6a1d1ed7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "abaf01b813feab789660f33db1da5ce57a07d776c59ace56a7ea8fae6a1d1ed7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking cookbook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/notes/alpha.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/notes/copy_trait.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `notes::alpha`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use notes::alpha;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     process::exit(-1);
[INFO] [stderr]    |     ----------------- any code following this expression is unreachable
[INFO] [stderr] 17 | 
[INFO] [stderr] 18 |     copy_trait::sort_for_struct();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]  --> src/notes/alpha.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::mem;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]  --> src/notes/copy_trait.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `notes::alpha`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use notes::alpha;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `status`
[INFO] [stderr]   --> src/command.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             status,
[INFO] [stderr]    |             ^^^^^^ help: try ignoring the field: `status: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stderr`
[INFO] [stderr]   --> src/command.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |             stderr,
[INFO] [stderr]    |             ^^^^^^ help: try ignoring the field: `stderr: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p_duck`
[INFO] [stderr]   --> src/notes/alpha.rs:24:22
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn print_traitobject(p_duck: &dyn Bird) {
[INFO] [stderr]    |                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_p_duck`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d3`
[INFO] [stderr]   --> src/notes/alpha.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let d3 = d2 as &dyn Bird;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_d3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v2`
[INFO] [stderr]   --> src/notes/copy_trait.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let v2 = v1;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algorithm.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let mut rng = rand::thread_rng();
[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: function is never used: `gen_a_u8_num`
[INFO] [stderr]   --> src/algorithm.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn gen_a_u8_num() -> u8 {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_a_i32_num`
[INFO] [stderr]   --> src/algorithm.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn gen_a_i32_num() -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_random_within_range`
[INFO] [stderr]   --> src/algorithm.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | pub fn gen_random_within_range(min: isize, max: isize) -> isize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_random_string`
[INFO] [stderr]   --> src/algorithm.rs:92:8
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub fn get_random_string(length: u8) -> String {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_random_string_from_customer_str`
[INFO] [stderr]    --> src/algorithm.rs:111:8
[INFO] [stderr]     |
[INFO] [stderr] 111 | pub fn get_random_string_from_customer_str(length: u8) -> String {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_traitobject`
[INFO] [stderr]   --> src/notes/alpha.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn print_traitobject(p_duck: &dyn Bird) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/notes/alpha.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/notes/alpha.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(dyn_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/notes/alpha.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(dyn_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     process::exit(-1);
[INFO] [stderr]    |     ----------------- any code following this expression is unreachable
[INFO] [stderr] 17 | 
[INFO] [stderr] 18 |     copy_trait::sort_for_struct();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `status`
[INFO] [stderr]   --> src/command.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             status,
[INFO] [stderr]    |             ^^^^^^ help: try ignoring the field: `status: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stderr`
[INFO] [stderr]   --> src/command.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |             stderr,
[INFO] [stderr]    |             ^^^^^^ help: try ignoring the field: `stderr: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p_duck`
[INFO] [stderr]   --> src/notes/alpha.rs:24:22
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn print_traitobject(p_duck: &dyn Bird) {
[INFO] [stderr]    |                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_p_duck`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d3`
[INFO] [stderr]   --> src/notes/alpha.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let d3 = d2 as &dyn Bird;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_d3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v2`
[INFO] [stderr]   --> src/notes/copy_trait.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let v2 = v1;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/algorithm.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let mut rng = rand::thread_rng();
[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: function is never used: `gen_a_u8_num`
[INFO] [stderr]   --> src/algorithm.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn gen_a_u8_num() -> u8 {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_a_i32_num`
[INFO] [stderr]   --> src/algorithm.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn gen_a_i32_num() -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gen_random_within_range`
[INFO] [stderr]   --> src/algorithm.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | pub fn gen_random_within_range(min: isize, max: isize) -> isize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_traitobject`
[INFO] [stderr]   --> src/notes/alpha.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn print_traitobject(p_duck: &dyn Bird) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/notes/alpha.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/notes/alpha.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(dyn_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/notes/alpha.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(dyn_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 17 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.91s
[INFO] running `"docker" "inspect" "abaf01b813feab789660f33db1da5ce57a07d776c59ace56a7ea8fae6a1d1ed7"`
[INFO] running `"docker" "rm" "-f" "abaf01b813feab789660f33db1da5ce57a07d776c59ace56a7ea8fae6a1d1ed7"`
[INFO] [stdout] abaf01b813feab789660f33db1da5ce57a07d776c59ace56a7ea8fae6a1d1ed7