[INFO] updating cached repository https://github.com/benschau/rsh
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] feb64da09403747bbd897685930b5cdc33b4404b
[INFO] checking benschau/rsh against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbenschau%2Frsh" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/benschau/rsh on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/benschau/rsh
[INFO] finished tweaking git repo https://github.com/benschau/rsh
[INFO] tweaked toml for git repo https://github.com/benschau/rsh written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/benschau/rsh already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 266be2f7bc1a9974a9b033561d82f26ad6215559a3a5d129792545ea44c50ef4
[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" "266be2f7bc1a9974a9b033561d82f26ad6215559a3a5d129792545ea44c50ef4"`
[INFO] [stderr]    Compiling nix v0.11.0
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking encode_unicode v0.1.3
[INFO] [stderr]     Checking termion v1.5.3
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking rustyline v1.0.0
[INFO] [stderr]     Checking rsh v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/lib.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `FromRawFd`, `IntoRawFd`
[INFO] [stderr]   --> src/lib.rs:11:25
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::os::unix::io::{FromRawFd, IntoRawFd};
[INFO] [stderr]    |                         ^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdio`
[INFO] [stderr]   --> src/lib.rs:13:29
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::process::{Command, Stdio};
[INFO] [stderr]    |                             ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use std::collections::HashMap;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `nix::unistd::pipe`
[INFO] [stderr]   --> src/lib.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use nix::unistd::pipe;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rustyline::error::ReadlineError`
[INFO] [stderr]   --> src/lib.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use rustyline::error::ReadlineError;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:37:49
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn export(env: &[String]) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                 ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:44:34
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn unset() -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/builtin.rs:51:37
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |                                     ^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:51:48
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/builtin.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 52 |     Ok((0))
[INFO] [stderr]    |        ^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/builtin.rs:58:24
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn pwd() -> Result<(PathBuf), Box<Error>> {
[INFO] [stderr]    |                        ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:58:39
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn pwd() -> Result<(PathBuf), Box<Error>> {
[INFO] [stderr]    |                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/builtin.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 |     Ok((env::current_dir().unwrap()))
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:55:46
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn run(config: Config) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/lib.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `FromRawFd`, `IntoRawFd`
[INFO] [stderr]   --> src/lib.rs:11:25
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::os::unix::io::{FromRawFd, IntoRawFd};
[INFO] [stderr]    |                         ^^^^^^^^^  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Stdio`
[INFO] [stderr]   --> src/lib.rs:13:29
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::process::{Command, Stdio};
[INFO] [stderr]    |                             ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]   --> src/lib.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use std::collections::HashMap;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `nix::unistd::pipe`
[INFO] [stderr]   --> src/lib.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use nix::unistd::pipe;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rustyline::error::ReadlineError`
[INFO] [stderr]   --> src/lib.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use rustyline::error::ReadlineError;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:37:49
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn export(env: &[String]) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                 ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:44:34
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn unset() -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/builtin.rs:51:37
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |                                     ^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:51:48
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/builtin.rs:52:8
[INFO] [stderr]    |
[INFO] [stderr] 52 |     Ok((0))
[INFO] [stderr]    |        ^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/builtin.rs:58:24
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn pwd() -> Result<(PathBuf), Box<Error>> {
[INFO] [stderr]    |                        ^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/builtin.rs:58:39
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn pwd() -> Result<(PathBuf), Box<Error>> {
[INFO] [stderr]    |                                       ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/builtin.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 |     Ok((env::current_dir().unwrap()))
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:55:46
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn run(config: Config) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/lib.rs:209:9
[INFO] [stderr]     |
[INFO] [stderr] 209 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stdin`
[INFO] [stderr]   --> src/lib.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let stdin = io::stdin();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `pwd` is assigned to, but never used
[INFO] [stderr]   --> src/lib.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let mut pwd: PathBuf;
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_pwd` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `pwd` is never read
[INFO] [stderr]   --> src/lib.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         pwd = builtin::pwd()?;
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/lib.rs:113:25
[INFO] [stderr]     |
[INFO] [stderr] 113 |                     Err(e) => {
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:177:10
[INFO] [stderr]     |
[INFO] [stderr] 177 |     for (i, token) in tokens.iter().enumerate() {
[INFO] [stderr]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/builtin.rs:37:15
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn export(env: &[String]) -> Result<(), Box<Error>> {
[INFO] [stderr]    |               ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `string`
[INFO] [stderr]   --> src/builtin.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let mut running: bool = true;
[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: unused variable: `stdin`
[INFO] [stderr]   --> src/lib.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let stdin = io::stdin();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `pwd` is assigned to, but never used
[INFO] [stderr]   --> src/lib.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let mut pwd: PathBuf;
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_pwd` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `pwd` is never read
[INFO] [stderr]   --> src/lib.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         pwd = builtin::pwd()?;
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/lib.rs:113:25
[INFO] [stderr]     |
[INFO] [stderr] 113 |                     Err(e) => {
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:177:10
[INFO] [stderr]     |
[INFO] [stderr] 177 |     for (i, token) in tokens.iter().enumerate() {
[INFO] [stderr]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `env`
[INFO] [stderr]   --> src/builtin.rs:37:15
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn export(env: &[String]) -> Result<(), Box<Error>> {
[INFO] [stderr]    |               ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `string`
[INFO] [stderr]   --> src/builtin.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `filetype`
[INFO] [stderr]    --> src/lib.rs:213:13
[INFO] [stderr]     |
[INFO] [stderr] 213 |         let filetype = "startup";
[INFO] [stderr]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filetype`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `filename`
[INFO] [stderr]    --> src/lib.rs:214:13
[INFO] [stderr]     |
[INFO] [stderr] 214 |         let filename = "./rshrc";
[INFO] [stderr]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_filename`
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `HELP`
[INFO] [stderr]   --> src/builtin.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | / static HELP: &'static str = "
[INFO] [stderr] 10 | |     exit - exits the shell.     
[INFO] [stderr] 11 | | ";
[INFO] [stderr]    | |__^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `help`
[INFO] [stderr]   --> src/builtin.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn help() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cd`
[INFO] [stderr]   --> src/builtin.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn cd(path: PathBuf) {
[INFO] [stderr]    |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `export`
[INFO] [stderr]   --> src/builtin.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn export(env: &[String]) -> Result<(), Box<Error>> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `unset`
[INFO] [stderr]   --> src/builtin.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn unset() -> Result<(), Box<Error>> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hash`
[INFO] [stderr]   --> src/builtin.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `stdin_fd`
[INFO] [stderr]    --> src/lib.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 |     stdin_fd: c_int,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `stdout_fd`
[INFO] [stderr]    --> src/lib.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     stdout_fd: c_int,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `stderr_fd`
[INFO] [stderr]    --> src/lib.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     stderr_fd: c_int,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let mut running: bool = true;
[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: static item is never used: `HELP`
[INFO] [stderr]   --> src/builtin.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | / static HELP: &'static str = "
[INFO] [stderr] 10 | |     exit - exits the shell.     
[INFO] [stderr] 11 | | ";
[INFO] [stderr]    | |__^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `help`
[INFO] [stderr]   --> src/builtin.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn help() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cd`
[INFO] [stderr]   --> src/builtin.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub fn cd(path: PathBuf) {
[INFO] [stderr]    |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `export`
[INFO] [stderr]   --> src/builtin.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn export(env: &[String]) -> Result<(), Box<Error>> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `unset`
[INFO] [stderr]   --> src/builtin.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn unset() -> Result<(), Box<Error>> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hash`
[INFO] [stderr]   --> src/builtin.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn hash(string: &str) -> Result<(u32), Box<Error>> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `stdin_fd`
[INFO] [stderr]    --> src/lib.rs:127:5
[INFO] [stderr]     |
[INFO] [stderr] 127 |     stdin_fd: c_int,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `stdout_fd`
[INFO] [stderr]    --> src/lib.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     stdout_fd: c_int,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `stderr_fd`
[INFO] [stderr]    --> src/lib.rs:129:5
[INFO] [stderr]     |
[INFO] [stderr] 129 |     stderr_fd: c_int,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 32 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 35 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.29s
[INFO] running `"docker" "inspect" "266be2f7bc1a9974a9b033561d82f26ad6215559a3a5d129792545ea44c50ef4"`
[INFO] running `"docker" "rm" "-f" "266be2f7bc1a9974a9b033561d82f26ad6215559a3a5d129792545ea44c50ef4"`
[INFO] [stdout] 266be2f7bc1a9974a9b033561d82f26ad6215559a3a5d129792545ea44c50ef4