[INFO] cloning repository https://github.com/JuanTorres93/hangman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JuanTorres93/hangman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJuanTorres93%2Fhangman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJuanTorres93%2Fhangman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 876cbb8fcc5f8c4d40f6d8042b5a091b24077fda
[INFO] checking JuanTorres93/hangman against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJuanTorres93%2Fhangman" "/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/JuanTorres93/hangman on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JuanTorres93/hangman
[INFO] finished tweaking git repo https://github.com/JuanTorres93/hangman
[INFO] tweaked toml for git repo https://github.com/JuanTorres93/hangman written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/JuanTorres93/hangman already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9156dddf1f31af99d3e0df8f33872456e8e03518e07d169e63701a59c0f42da5
[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" "9156dddf1f31af99d3e0df8f33872456e8e03518e07d169e63701a59c0f42da5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9156dddf1f31af99d3e0df8f33872456e8e03518e07d169e63701a59c0f42da5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9156dddf1f31af99d3e0df8f33872456e8e03518e07d169e63701a59c0f42da5", kill_on_drop: false }`
[INFO] [stdout] 9156dddf1f31af99d3e0df8f33872456e8e03518e07d169e63701a59c0f42da5
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ad0e50dbf82bb7b4a4657658a7c697eff3c91c10880838e033fc30f171202b68
[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" "ad0e50dbf82bb7b4a4657658a7c697eff3c91c10880838e033fc30f171202b68", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking home v0.5.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking hangman v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/hangman/file_system.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> src/hangman/file_system.rs:22:30
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn copy_file_to_location(origin: String, destination: String, overwrite: bool) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]   --> src/hangman/file_system.rs:22:46
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn copy_file_to_location(origin: String, destination: String, overwrite: bool) {
[INFO] [stdout]    |                                              ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/hangman/file_system.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file_to_string`
[INFO] [stdout]  --> src/hangman/file_system.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn read_file_to_string(filename: String) -> Result<(String, File), String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `copy_file_to_location`
[INFO] [stdout]   --> src/hangman/file_system.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn copy_file_to_location(origin: String, destination: String, overwrite: bool) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_directory`
[INFO] [stdout]   --> src/hangman/file_system.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn create_directory(dirname: &String){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `home_directory`
[INFO] [stdout]   --> src/hangman/file_system.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn home_directory() -> String{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `path_exists`
[INFO] [stdout]   --> src/hangman/file_system.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn path_exists(path: &String) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/hangman/file_system.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         create_dir_all(dirname);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> src/hangman/file_system.rs:22:30
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn copy_file_to_location(origin: String, destination: String, overwrite: bool) {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `destination`
[INFO] [stdout]   --> src/hangman/file_system.rs:22:46
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn copy_file_to_location(origin: String, destination: String, overwrite: bool) {
[INFO] [stdout]    |                                              ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_destination`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file_to_string`
[INFO] [stdout]  --> src/hangman/file_system.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn read_file_to_string(filename: String) -> Result<(String, File), String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `copy_file_to_location`
[INFO] [stdout]   --> src/hangman/file_system.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn copy_file_to_location(origin: String, destination: String, overwrite: bool) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_directory`
[INFO] [stdout]   --> src/hangman/file_system.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn create_directory(dirname: &String){
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `home_directory`
[INFO] [stdout]   --> src/hangman/file_system.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn home_directory() -> String{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `path_exists`
[INFO] [stdout]   --> src/hangman/file_system.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn path_exists(path: &String) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/hangman/file_system.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         create_dir_all(dirname);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.04s
[INFO] running `Command { std: "docker" "inspect" "ad0e50dbf82bb7b4a4657658a7c697eff3c91c10880838e033fc30f171202b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad0e50dbf82bb7b4a4657658a7c697eff3c91c10880838e033fc30f171202b68", kill_on_drop: false }`
[INFO] [stdout] ad0e50dbf82bb7b4a4657658a7c697eff3c91c10880838e033fc30f171202b68