[INFO] fetching crate libc_tools 0.1.3...
[INFO] checking libc_tools-0.1.3 against 1.55.0 for beta-1.56-3
[INFO] extracting crate libc_tools 0.1.3 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate libc_tools 0.1.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libc_tools 0.1.3
[INFO] finished tweaking crates.io crate libc_tools 0.1.3
[INFO] tweaked toml for crates.io crate libc_tools 0.1.3 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac149030d43d274446c3faadcd6caee27b74a893489c3dd2b45b536efd9c2fb4
[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" "ac149030d43d274446c3faadcd6caee27b74a893489c3dd2b45b536efd9c2fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac149030d43d274446c3faadcd6caee27b74a893489c3dd2b45b536efd9c2fb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac149030d43d274446c3faadcd6caee27b74a893489c3dd2b45b536efd9c2fb4", kill_on_drop: false }`
[INFO] [stdout] ac149030d43d274446c3faadcd6caee27b74a893489c3dd2b45b536efd9c2fb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f6ff25e82dc76ecb2cf3246d342bee5fff3709d33bf434df0db547f083a3c82
[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" "7f6ff25e82dc76ecb2cf3246d342bee5fff3709d33bf434df0db547f083a3c82", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc_tools v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Close`, `PipeSide`
[INFO] [stdout]   --> src/close.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |     use crate::{Close, Pipe, PipeSide};
[INFO] [stdout]    |                 ^^^^^        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Close`
[INFO] [stdout]  --> src/dup.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::Close;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `libc::execl`
[INFO] [stdout]    --> src/pipe.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 |     use libc::execl;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `c_void`, `pipe`, `read`
[INFO] [stdout]  --> src/popen.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 |     __errno_location, _exit, c_int, c_void, execl, fclose, fdopen, pipe, pipe2, read, socketpair,
[INFO] [stdout]   |                                     ^^^^^^                         ^^^^         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `FILE`, `SOCK_CLOEXEC`, `__errno_location`, `fclose`, `perror`
[INFO] [stdout]    --> src/popen.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |         __errno_location, fclose, fgets, perror, socketpair, strlen, FILE, PF_UNIX, SOCK_CLOEXEC,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^  ^^^^^^         ^^^^^^                      ^^^^           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Wait`, `popen::popen`
[INFO] [stdout]    --> src/popen.rs:192:17
[INFO] [stdout]     |
[INFO] [stdout] 192 |     use crate::{popen::popen, Close, Popen, Wait};
[INFO] [stdout]     |                 ^^^^^^^^^^^^                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error::Error`, `null_mut`
[INFO] [stdout]  --> src/pty.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 3 |     ptr::{null, null_mut},
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `stdin`
[INFO] [stdout]  --> src/run.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{stdin, Read};
[INFO] [stdout]   |               ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Close`
[INFO] [stdout]  --> src/dup.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::Close;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `c_void`, `pipe`, `read`
[INFO] [stdout]  --> src/popen.rs:2:37
[INFO] [stdout]   |
[INFO] [stdout] 2 |     __errno_location, _exit, c_int, c_void, execl, fclose, fdopen, pipe, pipe2, read, socketpair,
[INFO] [stdout]   |                                     ^^^^^^                         ^^^^         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error::Error`, `null_mut`
[INFO] [stdout]  --> src/pty.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 3 |     ptr::{null, null_mut},
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `stdin`
[INFO] [stdout]  --> src/run.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{stdin, Read};
[INFO] [stdout]   |               ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `popen::Popen::arg`: do not use!
[INFO] [stdout]    --> src/popen.rs:223:16
[INFO] [stdout]     |
[INFO] [stdout] 223 |         Popen::arg("date").exec().unwrap();
[INFO] [stdout]     |                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `popen::Popen::exec`: do not use!
[INFO] [stdout]    --> src/popen.rs:223:28
[INFO] [stdout]     |
[INFO] [stdout] 223 |         Popen::arg("date").exec().unwrap();
[INFO] [stdout]     |                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `popen::Popen::arg`: do not use!
[INFO] [stdout]    --> src/popen.rs:238:32
[INFO] [stdout]     |
[INFO] [stdout] 238 |             let popen = Popen::arg("time").exec().unwrap();
[INFO] [stdout]     |                                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `popen::Popen::exec`: do not use!
[INFO] [stdout]    --> src/popen.rs:238:44
[INFO] [stdout]     |
[INFO] [stdout] 238 |             let popen = Popen::arg("time").exec().unwrap();
[INFO] [stdout]     |                                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `popen::Popen::arg`: do not use!
[INFO] [stdout]    --> src/popen.rs:252:24
[INFO] [stdout]     |
[INFO] [stdout] 252 |         let o = Popen::arg(
[INFO] [stdout]     |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `popen::Popen::exec`: do not use!
[INFO] [stdout]    --> src/popen.rs:261:10
[INFO] [stdout]     |
[INFO] [stdout] 261 |         .exec()
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]    --> src/pipe.rs:142:13
[INFO] [stdout]     |
[INFO] [stdout] 142 |         let path = CString::new("/bin/sh")?;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sh`
[INFO] [stdout]    --> src/pipe.rs:143:13
[INFO] [stdout]     |
[INFO] [stdout] 143 |         let sh = CString::new("sh")?;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_sh`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exec`
[INFO] [stdout]    --> src/pipe.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let exec = CString::new("-c")?;
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_exec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]    --> src/pipe.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let arg = CString::new("ls")?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]  --> src/run.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut buf = [0 as u8; 4096];
[INFO] [stdout]   |             ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/run.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut buf = [0 as u8; 4096];
[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: associated function is never used: `to_string`
[INFO] [stdout]   --> src/popen.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn to_string(&self) -> 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: `socket_pipe`
[INFO] [stdout]   --> src/popen.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn socket_pipe() -> Result<[[c_int; 2]; 2], PopenError> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/run.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create`
[INFO] [stdout]   --> src/socket_pair.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn create(
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]  --> src/run.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut buf = [0 as u8; 4096];
[INFO] [stdout]   |             ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/run.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut buf = [0 as u8; 4096];
[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: associated function is never used: `to_string`
[INFO] [stdout]   --> src/popen.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn to_string(&self) -> 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: `socket_pipe`
[INFO] [stdout]   --> src/popen.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn socket_pipe() -> Result<[[c_int; 2]; 2], PopenError> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/run.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create`
[INFO] [stdout]   --> src/socket_pair.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn create(
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "7f6ff25e82dc76ecb2cf3246d342bee5fff3709d33bf434df0db547f083a3c82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f6ff25e82dc76ecb2cf3246d342bee5fff3709d33bf434df0db547f083a3c82", kill_on_drop: false }`
[INFO] [stdout] 7f6ff25e82dc76ecb2cf3246d342bee5fff3709d33bf434df0db547f083a3c82
