[INFO] cloning repository https://github.com/fankane/rust_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fankane/rust_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffankane%2Frust_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffankane%2Frust_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 314c8de4131a6685f2dfa22864b79c68db04fa50
[INFO] checking fankane/rust_practice against master#c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3 for pr-141352
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffankane%2Frust_practice" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fankane/rust_practice on toolchain c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fankane/rust_practice
[INFO] finished tweaking git repo https://github.com/fankane/rust_practice
[INFO] tweaked toml for git repo https://github.com/fankane/rust_practice written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fankane/rust_practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4231e1a5a7c25c7890216552126cf4c1c3edafcc40ab42fe82ab77e2a82b60c
[INFO] running `Command { std: "docker" "start" "-a" "a4231e1a5a7c25c7890216552126cf4c1c3edafcc40ab42fe82ab77e2a82b60c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4231e1a5a7c25c7890216552126cf4c1c3edafcc40ab42fe82ab77e2a82b60c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4231e1a5a7c25c7890216552126cf4c1c3edafcc40ab42fe82ab77e2a82b60c", kill_on_drop: false }`
[INFO] [stdout] a4231e1a5a7c25c7890216552126cf4c1c3edafcc40ab42fe82ab77e2a82b60c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+c43786c9b7b8d8dcc3f9c604e0e3074c16ed69d3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 062ae80c515a3cc96049714548cd1e3352cd314d8dc8f6ed1a380cb533ee8ef7
[INFO] running `Command { std: "docker" "start" "-a" "062ae80c515a3cc96049714548cd1e3352cd314d8dc8f6ed1a380cb533ee8ef7", kill_on_drop: false }`
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/grep.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/p_sort.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for (i, j) in Iterator::enumerate(0..n) {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/p_sort.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 |         for (k, l) in Iterator::enumerate(i + 1..n) {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InputConfig` is never constructed
[INFO] [stdout]  --> src/grep.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct InputConfig {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `InputConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `build` is never used
[INFO] [stdout]   --> src/grep.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl InputConfig {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn build(mut args: impl Iterator<Item = String>) -> Result<InputConfig, &'static str> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_msg` is never used
[INFO] [stdout]   --> src/grep.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn read_msg(conf: InputConfig) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search` is never used
[INFO] [stdout]   --> src/grep.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn search<'a>(query:&'a str, content: &'a str) -> Vec<&'a str> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/p_sort.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn add(a: i32, b:i32) -> i32 {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/p_sort.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[warn(dead_code)]
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]  --> src/p_sort.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn bubble_sort(arr: &mut [i32]) {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sort_maopao` is never used
[INFO] [stdout]   --> src/p_sort.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn sort_maopao(a: &mut [i32]) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `testsHF` should have a snake case name
[INFO] [stdout]   --> src/grep.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | mod testsHF {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to snake case: `tests_hf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `aLen` should have a snake case name
[INFO] [stdout]   --> src/p_sort.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let aLen = a.len();
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `a_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]   --> src/p_sort.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for (i, j) in Iterator::enumerate(0..n) {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/p_sort.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 |         for (k, l) in Iterator::enumerate(i + 1..n) {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/p_sort.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let r = bubble_sort(br);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InputConfig` is never constructed
[INFO] [stdout]  --> src/grep.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct InputConfig {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `InputConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `build` is never used
[INFO] [stdout]   --> src/grep.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl InputConfig {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn build(mut args: impl Iterator<Item = String>) -> Result<InputConfig, &'static str> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_msg` is never used
[INFO] [stdout]   --> src/grep.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn read_msg(conf: InputConfig) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `testsHF` should have a snake case name
[INFO] [stdout]   --> src/grep.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | mod testsHF {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to snake case: `tests_hf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `aLen` should have a snake case name
[INFO] [stdout]   --> src/p_sort.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let aLen = a.len();
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `a_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `aLen` should have a snake case name
[INFO] [stdout]   --> src/p_sort.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let aLen = a.len();
[INFO] [stdout]    |             ^^^^ help: convert the identifier to snake case: `a_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/grep.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `testsHF` should have a snake case name
[INFO] [stdout]   --> src/grep.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | mod testsHF {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to snake case: `tests_hf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `testsHF` should have a snake case name
[INFO] [stdout]   --> src/grep.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | mod testsHF {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to snake case: `tests_hf`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "062ae80c515a3cc96049714548cd1e3352cd314d8dc8f6ed1a380cb533ee8ef7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "062ae80c515a3cc96049714548cd1e3352cd314d8dc8f6ed1a380cb533ee8ef7", kill_on_drop: false }`
[INFO] [stdout] 062ae80c515a3cc96049714548cd1e3352cd314d8dc8f6ed1a380cb533ee8ef7