[INFO] fetching crate instadoc 0.5.5...
[INFO] checking instadoc-0.5.5 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate instadoc 0.5.5 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate instadoc 0.5.5
[INFO] finished tweaking crates.io crate instadoc 0.5.5
[INFO] tweaked toml for crates.io crate instadoc 0.5.5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate instadoc 0.5.5 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 instadoc 0.5.5 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 279182e3785ac795ad4ab9a9f801ff71717971b4fee3c2366c29373a31fb358e
[INFO] running `Command { std: "docker" "start" "-a" "279182e3785ac795ad4ab9a9f801ff71717971b4fee3c2366c29373a31fb358e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "279182e3785ac795ad4ab9a9f801ff71717971b4fee3c2366c29373a31fb358e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "279182e3785ac795ad4ab9a9f801ff71717971b4fee3c2366c29373a31fb358e", kill_on_drop: false }`
[INFO] [stdout] 279182e3785ac795ad4ab9a9f801ff71717971b4fee3c2366c29373a31fb358e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b7669d9e04e9668c052b1f04677ca108cd7339c912b166ed4029dc56883adf80
[INFO] running `Command { std: "docker" "start" "-a" "b7669d9e04e9668c052b1f04677ca108cd7339c912b166ed4029dc56883adf80", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking base64 v0.13.0
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[INFO] [stderr]     Checking miniz_oxide v0.5.3
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[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking textwrap v0.11.0
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[INFO] [stderr]    Compiling heck v0.4.0
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[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling onig_sys v69.7.1
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking xdg v2.4.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking onig v6.3.1
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking clap v3.1.18
[INFO] [stderr]     Checking plist v1.3.1
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[INFO] [stderr]     Checking handlebars v4.3.1
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[INFO] [stderr]     Checking instadoc v0.5.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Header` is never constructed
[INFO] [stdout]   --> src/model/mod.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub struct Header {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:37:3
[INFO] [stdout]    |
[INFO] [stdout] 37 | /   #[clap(long, short='T', help="The title of this documentation suite")]
[INFO] [stdout] 38 | |   title: 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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:39:3
[INFO] [stdout]    |
[INFO] [stdout] 39 | /   #[clap(long, short='t', help="The template document to use for rendering suites")]
[INFO] [stdout] 40 | |   template: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:41:3
[INFO] [stdout]    |
[INFO] [stdout] 41 | /   #[clap(long, short='o', help="The output document root to write files under")]
[INFO] [stdout] 42 | |   output: Option<String>,
[INFO] [stdout]    | |________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:43:3
[INFO] [stdout]    |
[INFO] [stdout] 43 | /   #[clap(long, short='x', help="The template document to use for rendering an index; if omitted, no index is generated")]
[INFO] [stdout] 44 | |   index: Option<String>,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:45:3
[INFO] [stdout]    |
[INFO] [stdout] 45 | /   #[clap(help="Documents to process")]
[INFO] [stdout] 46 | |   docs: Vec<String>,
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `instadoc` (bin "instadoc" test) due to 5 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct `Header` is never constructed
[INFO] [stdout]   --> src/model/mod.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub struct Header {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:37:3
[INFO] [stdout]    |
[INFO] [stdout] 37 | /   #[clap(long, short='T', help="The title of this documentation suite")]
[INFO] [stdout] 38 | |   title: 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<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:39:3
[INFO] [stdout]    |
[INFO] [stdout] 39 | /   #[clap(long, short='t', help="The template document to use for rendering suites")]
[INFO] [stdout] 40 | |   template: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:41:3
[INFO] [stdout]    |
[INFO] [stdout] 41 | /   #[clap(long, short='o', help="The output document root to write files under")]
[INFO] [stdout] 42 | |   output: Option<String>,
[INFO] [stdout]    | |________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:43:3
[INFO] [stdout]    |
[INFO] [stdout] 43 | /   #[clap(long, short='x', help="The template document to use for rendering an index; if omitted, no index is generated")]
[INFO] [stdout] 44 | |   index: Option<String>,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:45:3
[INFO] [stdout]    |
[INFO] [stdout] 45 | /   #[clap(help="Documents to process")]
[INFO] [stdout] 46 | |   docs: Vec<String>,
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `instadoc` (bin "instadoc") due to 5 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "b7669d9e04e9668c052b1f04677ca108cd7339c912b166ed4029dc56883adf80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7669d9e04e9668c052b1f04677ca108cd7339c912b166ed4029dc56883adf80", kill_on_drop: false }`
[INFO] [stdout] b7669d9e04e9668c052b1f04677ca108cd7339c912b166ed4029dc56883adf80