[INFO] cloning repository https://github.com/jianlexia/rustlesson4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jianlexia/rustlesson4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjianlexia%2Frustlesson4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjianlexia%2Frustlesson4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 57df6374e26b47b3ec4ce8ec7c45357ab4bc09a8
[INFO] testing jianlexia/rustlesson4 against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjianlexia%2Frustlesson4" "/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/jianlexia/rustlesson4 on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jianlexia/rustlesson4
[INFO] finished tweaking git repo https://github.com/jianlexia/rustlesson4
[INFO] tweaked toml for git repo https://github.com/jianlexia/rustlesson4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/jianlexia/rustlesson4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "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" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d986d04b689b5f1f7cc4246fcf1f374e0766d418e70e6f52a968338850a8ed1c
[INFO] running `Command { std: "docker" "start" "-a" "d986d04b689b5f1f7cc4246fcf1f374e0766d418e70e6f52a968338850a8ed1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d986d04b689b5f1f7cc4246fcf1f374e0766d418e70e6f52a968338850a8ed1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d986d04b689b5f1f7cc4246fcf1f374e0766d418e70e6f52a968338850a8ed1c", kill_on_drop: false }`
[INFO] [stdout] d986d04b689b5f1f7cc4246fcf1f374e0766d418e70e6f52a968338850a8ed1c
[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" "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" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 22fc2fd20e0061de49816a8daf18163e4c24b23308919df58a0a76cf4a78e9f7
[INFO] running `Command { std: "docker" "start" "-a" "22fc2fd20e0061de49816a8daf18163e4c24b23308919df58a0a76cf4a78e9f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling chrono v0.4.18
[INFO] [stderr]    Compiling mycat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufRead`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{Read, BufRead};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `param`
[INFO] [stdout]   --> src/main.rs:71:23
[INFO] [stdout]    |
[INFO] [stdout] 71 |         ("time", Some(param)) => {
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_param`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |             let mut f = File::open(filePath).expect("[mycat Error] File not found.");
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let mut buf = io::BufReader::new(f);
[INFO] [stdout]    |                 ----^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 73 |             let mut dt = Local::now();
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `filePath` should have a snake case name
[INFO] [stdout]   --> src/main.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let filePath = Path::new(&file);
[INFO] [stdout]    |                 ^^^^^^^^ help: convert the identifier to snake case: `file_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `printLine` should have a snake case name
[INFO] [stdout]   --> src/main.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn printLine(line: String) {
[INFO] [stdout]    |    ^^^^^^^^^ help: convert the identifier to snake case: `print_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.36s
[INFO] running `Command { std: "docker" "inspect" "22fc2fd20e0061de49816a8daf18163e4c24b23308919df58a0a76cf4a78e9f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22fc2fd20e0061de49816a8daf18163e4c24b23308919df58a0a76cf4a78e9f7", kill_on_drop: false }`
[INFO] [stdout] 22fc2fd20e0061de49816a8daf18163e4c24b23308919df58a0a76cf4a78e9f7
[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" "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" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1a0c7025f0f8a2f10f85ff91bbbf5daf90339ef00709195bf17d16cd3dbbcca
[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" "f1a0c7025f0f8a2f10f85ff91bbbf5daf90339ef00709195bf17d16cd3dbbcca", kill_on_drop: false }`
[INFO] [stderr]    Compiling mycat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufRead`
[INFO] [stdout]  --> src/main.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{Read, BufRead};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `param`
[INFO] [stdout]   --> src/main.rs:71:23
[INFO] [stdout]    |
[INFO] [stdout] 71 |         ("time", Some(param)) => {
[INFO] [stdout]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_param`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |             let mut f = File::open(filePath).expect("[mycat Error] File not found.");
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let mut buf = io::BufReader::new(f);
[INFO] [stdout]    |                 ----^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 73 |             let mut dt = Local::now();
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `filePath` should have a snake case name
[INFO] [stdout]   --> src/main.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |             let filePath = Path::new(&file);
[INFO] [stdout]    |                 ^^^^^^^^ help: convert the identifier to snake case: `file_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `printLine` should have a snake case name
[INFO] [stdout]   --> src/main.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn printLine(line: String) {
[INFO] [stdout]    |    ^^^^^^^^^ help: convert the identifier to snake case: `print_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "f1a0c7025f0f8a2f10f85ff91bbbf5daf90339ef00709195bf17d16cd3dbbcca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1a0c7025f0f8a2f10f85ff91bbbf5daf90339ef00709195bf17d16cd3dbbcca", kill_on_drop: false }`
[INFO] [stdout] f1a0c7025f0f8a2f10f85ff91bbbf5daf90339ef00709195bf17d16cd3dbbcca
[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" "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" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 625fb02e733981dcdbb6fc7c200c01934aba87dc4b57258548f415573c682cf2
[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" "625fb02e733981dcdbb6fc7c200c01934aba87dc4b57258548f415573c682cf2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `BufRead`
[INFO] [stderr]  --> src/main.rs:7:21
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{Read, BufRead};
[INFO] [stderr]   |                     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `param`
[INFO] [stderr]   --> src/main.rs:71:23
[INFO] [stderr]    |
[INFO] [stderr] 71 |         ("time", Some(param)) => {
[INFO] [stderr]    |                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_param`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |             let mut f = File::open(filePath).expect("[mycat Error] File not found.");
[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/main.rs:62:17
[INFO] [stderr]    |
[INFO] [stderr] 62 |             let mut buf = io::BufReader::new(f);
[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/main.rs:73:17
[INFO] [stderr]    |
[INFO] [stderr] 73 |             let mut dt = Local::now();
[INFO] [stderr]    |                 ----^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `filePath` should have a snake case name
[INFO] [stderr]   --> src/main.rs:60:17
[INFO] [stderr]    |
[INFO] [stderr] 60 |             let filePath = Path::new(&file);
[INFO] [stderr]    |                 ^^^^^^^^ help: convert the identifier to snake case: `file_path`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `printLine` should have a snake case name
[INFO] [stderr]   --> src/main.rs:82:4
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn printLine(line: String) {
[INFO] [stderr]    |    ^^^^^^^^^ help: convert the identifier to snake case: `print_line`
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.42s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mycat-8f2226880101a7e2
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "625fb02e733981dcdbb6fc7c200c01934aba87dc4b57258548f415573c682cf2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "625fb02e733981dcdbb6fc7c200c01934aba87dc4b57258548f415573c682cf2", kill_on_drop: false }`
[INFO] [stdout] 625fb02e733981dcdbb6fc7c200c01934aba87dc4b57258548f415573c682cf2