[INFO] fetching crate neu 0.0.0...
[INFO] checking neu-0.0.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate neu 0.0.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate neu 0.0.0
[INFO] finished tweaking crates.io crate neu 0.0.0
[INFO] tweaked toml for crates.io crate neu 0.0.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate neu 0.0.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate neu 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 301bc9e53f9a6849e189d7c440596156f8918a4068de4daf79255cb1d1bf662d
[INFO] running `Command { std: "docker" "start" "-a" "301bc9e53f9a6849e189d7c440596156f8918a4068de4daf79255cb1d1bf662d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "301bc9e53f9a6849e189d7c440596156f8918a4068de4daf79255cb1d1bf662d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "301bc9e53f9a6849e189d7c440596156f8918a4068de4daf79255cb1d1bf662d", kill_on_drop: false }`
[INFO] [stdout] 301bc9e53f9a6849e189d7c440596156f8918a4068de4daf79255cb1d1bf662d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] edb3b13ff84b0443c2be41493dbdb48ef635c71837eb92b57a9cc7b34fd73216
[INFO] running `Command { std: "docker" "start" "-a" "edb3b13ff84b0443c2be41493dbdb48ef635c71837eb92b57a9cc7b34fd73216", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking fastrand v1.4.1
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling signal-hook v0.3.8
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking spinning_top v0.2.4
[INFO] [stderr]     Checking spinny v0.2.2
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]     Checking spin v0.7.1
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking barrage v0.2.1
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking unicode-segmentation v1.7.1
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking pollster v0.2.4
[INFO] [stderr]     Checking os_str_bytes v2.4.0
[INFO] [stderr]     Checking bytecount v0.5.1
[INFO] [stderr]     Checking catty v0.1.4
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]     Checking bitvec v0.19.5
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking async-process v1.1.0
[INFO] [stderr]     Checking async-net v1.6.0
[INFO] [stderr]     Checking xi-rope v0.3.0
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking flume v0.10.5
[INFO] [stderr]     Checking xtra v0.5.1
[INFO] [stderr]     Checking neu v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `count` is never read
[INFO] [stdout]  --> src/selection.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub(crate) struct Selection {
[INFO] [stdout]   |                   --------- field in this struct
[INFO] [stdout] 7 |     pub(crate) count: usize,
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Line` is never constructed
[INFO] [stdout]   --> src/selection.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) enum SelectionKind {
[INFO] [stdout]    |                 ------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 19 |     Line,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     filename: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffer.rs:135:51
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub(crate) fn slice_as_str<I: IntervalBounds>(&self, range: I) -> Cow<str> {
[INFO] [stdout]     |                                                   ^^^^^               ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                                   |
[INFO] [stdout]     |                                                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub(crate) fn slice_as_str<I: IntervalBounds>(&self, range: I) -> Cow<'_, str> {
[INFO] [stdout]     |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffer.rs:139:26
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub(crate) fn as_str(&self) -> Cow<str> {
[INFO] [stdout]     |                          ^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub(crate) fn as_str(&self) -> Cow<'_, str> {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `count` is never read
[INFO] [stdout]  --> src/selection.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub(crate) struct Selection {
[INFO] [stdout]   |                   --------- field in this struct
[INFO] [stdout] 7 |     pub(crate) count: usize,
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Line` is never constructed
[INFO] [stdout]   --> src/selection.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) enum SelectionKind {
[INFO] [stdout]    |                 ------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 19 |     Line,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `neu` (bin "neu") due to 1 previous error; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     filename: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffer.rs:135:51
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub(crate) fn slice_as_str<I: IntervalBounds>(&self, range: I) -> Cow<str> {
[INFO] [stdout]     |                                                   ^^^^^               ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                                   |
[INFO] [stdout]     |                                                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 135 |     pub(crate) fn slice_as_str<I: IntervalBounds>(&self, range: I) -> Cow<'_, str> {
[INFO] [stdout]     |                                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/buffer.rs:139:26
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub(crate) fn as_str(&self) -> Cow<str> {
[INFO] [stdout]     |                          ^^^^^     ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub(crate) fn as_str(&self) -> Cow<'_, str> {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `neu` (bin "neu" test) due to 1 previous error; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "edb3b13ff84b0443c2be41493dbdb48ef635c71837eb92b57a9cc7b34fd73216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edb3b13ff84b0443c2be41493dbdb48ef635c71837eb92b57a9cc7b34fd73216", kill_on_drop: false }`
[INFO] [stdout] edb3b13ff84b0443c2be41493dbdb48ef635c71837eb92b57a9cc7b34fd73216
