[INFO] fetching crate hors 0.8.2...
[INFO] checking hors-0.8.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate hors 0.8.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate hors 0.8.2
[INFO] finished tweaking crates.io crate hors 0.8.2
[INFO] tweaked toml for crates.io crate hors 0.8.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate hors 0.8.2 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 hors 0.8.2 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 7833913b54d5fd1a3c7dccdaa0a84a333ccb93c7ae2f00b6f392cdb7058f8e1d
[INFO] running `Command { std: "docker" "start" "-a" "7833913b54d5fd1a3c7dccdaa0a84a333ccb93c7ae2f00b6f392cdb7058f8e1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7833913b54d5fd1a3c7dccdaa0a84a333ccb93c7ae2f00b6f392cdb7058f8e1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7833913b54d5fd1a3c7dccdaa0a84a333ccb93c7ae2f00b6f392cdb7058f8e1d", kill_on_drop: false }`
[INFO] [stdout] 7833913b54d5fd1a3c7dccdaa0a84a333ccb93c7ae2f00b6f392cdb7058f8e1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 75e81cfb97ca30d2ca454fadbbfdfeaa70a7d6d63bd4385e71b2c970d6023c19
[INFO] running `Command { std: "docker" "start" "-a" "75e81cfb97ca30d2ca454fadbbfdfeaa70a7d6d63bd4385e71b2c970d6023c19", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling libc v0.2.89
[INFO] [stderr]    Compiling unicode-xid v0.2.1
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[INFO] [stderr]     Checking bytes v1.0.1
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[INFO] [stderr]     Checking pin-project-lite v0.2.6
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[INFO] [stderr]    Compiling pkg-config v0.3.19
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[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking unicode-normalization v0.1.17
[INFO] [stderr]    Compiling cookie v0.14.4
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking time v0.1.43
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[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking tracing v0.1.25
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[INFO] [stderr]    Compiling phf_generator v0.8.0
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[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.13
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.5
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
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[INFO] [stderr]     Checking time-macros v0.1.1
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[INFO] [stderr]     Checking tokio-util v0.6.4
[INFO] [stderr]     Checking tokio-rustls v0.22.0
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[INFO] [stderr]     Checking tokio-socks v0.5.1
[INFO] [stderr]     Checking h2 v0.3.1
[INFO] [stderr]     Checking hyper v0.14.4
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking serde_json v1.0.64
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[INFO] [stderr]     Checking bincode v1.3.2
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking cookie_store v0.12.0
[INFO] [stderr]     Checking syntect v4.5.0
[INFO] [stderr]     Checking hyper-rustls v0.22.1
[INFO] [stderr]     Checking reqwest v0.11.2
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking xml5ever v0.16.1
[INFO] [stderr]     Checking markup5ever_rcdom v0.1.0
[INFO] [stderr]     Checking select v0.5.0
[INFO] [stderr]     Checking hors v0.8.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `quota_max` and `quota_remaining` are never read
[INFO] [stdout]   --> src/engine/stackoverflow.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Questions {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 37 |     items: Vec<QuestionItem>,
[INFO] [stdout] 38 |     quota_max: u16,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 39 |     quota_remaining: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Questions` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/answer/precious.rs:153:23
[INFO] [stdout]     |
[INFO] [stdout] 153 | fn select_answer(doc: &Document) -> Option<Node> {
[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] 153 | fn select_answer(doc: &Document) -> Option<Node<'_>> {
[INFO] [stdout]     |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/hors.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     #[clap(
[INFO] [stdout] 24 | |         short,
[INFO] [stdout] 25 | |         long,
[INFO] [stdout] 26 | |         default_value = "auto",
[INFO] [stdout] 27 | |         about("specify how to page output, can be `auto`, `never`")
[INFO] [stdout] 28 | |     )]
[INFO] [stdout] 29 | |     paging: 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] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/hors.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | /     #[clap(
[INFO] [stdout] 38 | |         short,
[INFO] [stdout] 39 | |         long,
[INFO] [stdout] 40 | |         default_value = "duckduckgo",
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |     )]
[INFO] [stdout] 44 | |     engine: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/hors.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     query: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `quota_max` and `quota_remaining` are never read
[INFO] [stdout]   --> src/engine/stackoverflow.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Questions {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 37 |     items: Vec<QuestionItem>,
[INFO] [stdout] 38 |     quota_max: u16,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 39 |     quota_remaining: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Questions` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/answer/precious.rs:153:23
[INFO] [stdout]     |
[INFO] [stdout] 153 | fn select_answer(doc: &Document) -> Option<Node> {
[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] 153 | fn select_answer(doc: &Document) -> Option<Node<'_>> {
[INFO] [stdout]     |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hors` (bin "hors" test) due to 3 previous errors
[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/bin/hors.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     #[clap(
[INFO] [stdout] 24 | |         short,
[INFO] [stdout] 25 | |         long,
[INFO] [stdout] 26 | |         default_value = "auto",
[INFO] [stdout] 27 | |         about("specify how to page output, can be `auto`, `never`")
[INFO] [stdout] 28 | |     )]
[INFO] [stdout] 29 | |     paging: 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] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/hors.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | /     #[clap(
[INFO] [stdout] 38 | |         short,
[INFO] [stdout] 39 | |         long,
[INFO] [stdout] 40 | |         default_value = "duckduckgo",
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |     )]
[INFO] [stdout] 44 | |     engine: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/hors.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     query: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hors` (bin "hors") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "75e81cfb97ca30d2ca454fadbbfdfeaa70a7d6d63bd4385e71b2c970d6023c19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75e81cfb97ca30d2ca454fadbbfdfeaa70a7d6d63bd4385e71b2c970d6023c19", kill_on_drop: false }`
[INFO] [stdout] 75e81cfb97ca30d2ca454fadbbfdfeaa70a7d6d63bd4385e71b2c970d6023c19
