[INFO] cloning repository https://github.com/3541/shell
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/3541/shell" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3541%2Fshell", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3541%2Fshell'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 173aa3509cd1cccc8422ffee622efb2fb0661406
[INFO] checking 3541/shell against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F3541%2Fshell" "/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/3541/shell on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/3541/shell
[INFO] finished tweaking git repo https://github.com/3541/shell
[INFO] tweaked toml for git repo https://github.com/3541/shell written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/3541/shell already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7476950a373ff223f1f9093543e87c7323cd78292a0c0d914b13f9d8c6ddd822
[INFO] running `Command { std: "docker" "start" "-a" "7476950a373ff223f1f9093543e87c7323cd78292a0c0d914b13f9d8c6ddd822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7476950a373ff223f1f9093543e87c7323cd78292a0c0d914b13f9d8c6ddd822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7476950a373ff223f1f9093543e87c7323cd78292a0c0d914b13f9d8c6ddd822", kill_on_drop: false }`
[INFO] [stdout] 7476950a373ff223f1f9093543e87c7323cd78292a0c0d914b13f9d8c6ddd822
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c01693def399b6a0ec5f187829bdaffc17c97b3f9d8d6cde9f94a3eec54093e
[INFO] running `Command { std: "docker" "start" "-a" "7c01693def399b6a0ec5f187829bdaffc17c97b3f9d8d6cde9f94a3eec54093e", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking libc v0.2.18
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]     Checking shell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `c_line` is never read
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut c_line = String::new();
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `c_line` is never read
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let mut c_line = String::new();
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/builtin.rs:53:28
[INFO] [stdout]    |
[INFO] [stdout] 53 |         for bn in BUILTINS.into_iter() {
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 53 |         for bn in BUILTINS.iter() {
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 53 |         for bn in BUILTINS {
[INFO] [stdout]    |                          --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/builtin.rs:57:28
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for bn in BUILTINS.into_iter() {
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for bn in BUILTINS.iter() {
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for bn in BUILTINS {
[INFO] [stdout]    |                          --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/builtin.rs:53:28
[INFO] [stdout]    |
[INFO] [stdout] 53 |         for bn in BUILTINS.into_iter() {
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 53 |         for bn in BUILTINS.iter() {
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 53 |         for bn in BUILTINS {
[INFO] [stdout]    |                          --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/builtin.rs:57:28
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for bn in BUILTINS.into_iter() {
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for bn in BUILTINS.iter() {
[INFO] [stdout]    |                            ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 57 |         for bn in BUILTINS {
[INFO] [stdout]    |                          --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/main.rs:190:33
[INFO] [stdout]     |
[INFO] [stdout] 190 |     for bn in builtin::BUILTINS.into_iter() {
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 190 |     for bn in builtin::BUILTINS.iter() {
[INFO] [stdout]     |                                 ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 190 |     for bn in builtin::BUILTINS {
[INFO] [stdout]     |                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]    --> src/main.rs:190:33
[INFO] [stdout]     |
[INFO] [stdout] 190 |     for bn in builtin::BUILTINS.into_iter() {
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2021
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]     |
[INFO] [stdout] 190 |     for bn in builtin::BUILTINS.iter() {
[INFO] [stdout]     |                                 ^^^^
[INFO] [stdout] help: or remove `.into_iter()` to iterate by value
[INFO] [stdout]     |
[INFO] [stdout] 190 |     for bn in builtin::BUILTINS {
[INFO] [stdout]     |                               --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.90s
[INFO] running `Command { std: "docker" "inspect" "7c01693def399b6a0ec5f187829bdaffc17c97b3f9d8d6cde9f94a3eec54093e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c01693def399b6a0ec5f187829bdaffc17c97b3f9d8d6cde9f94a3eec54093e", kill_on_drop: false }`
[INFO] [stdout] 7c01693def399b6a0ec5f187829bdaffc17c97b3f9d8d6cde9f94a3eec54093e