[INFO] fetching crate exemplify 0.1.6...
[INFO] checking exemplify-0.1.6 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate exemplify 0.1.6 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate exemplify 0.1.6
[INFO] finished tweaking crates.io crate exemplify 0.1.6
[INFO] tweaked toml for crates.io crate exemplify 0.1.6 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate exemplify 0.1.6 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 exemplify 0.1.6 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 8c5e81f72ff299ef9bf54be8e4110afae9b4b8b03c67d0f9cbc762bc41873e7a
[INFO] running `Command { std: "docker" "start" "-a" "8c5e81f72ff299ef9bf54be8e4110afae9b4b8b03c67d0f9cbc762bc41873e7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c5e81f72ff299ef9bf54be8e4110afae9b4b8b03c67d0f9cbc762bc41873e7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c5e81f72ff299ef9bf54be8e4110afae9b4b8b03c67d0f9cbc762bc41873e7a", kill_on_drop: false }`
[INFO] [stdout] 8c5e81f72ff299ef9bf54be8e4110afae9b4b8b03c67d0f9cbc762bc41873e7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3a53bb672785c9ef3a13f091aa01ba23429b280fd1ddaa012c6c3c78b840cac4
[INFO] running `Command { std: "docker" "start" "-a" "3a53bb672785c9ef3a13f091aa01ba23429b280fd1ddaa012c6c3c78b840cac4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]     Checking memchr v2.3.3
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking hashbrown v0.9.0
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking os_str_bytes v2.3.2
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.1
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking clap v3.0.0-beta.1
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking exemplify-lib v0.1.6
[INFO] [stderr]     Checking exemplify v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `print` is never read
[INFO] [stdout]   --> src/layers/application/cli_params.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout]  4 | pub struct ExemplifyCliParams {
[INFO] [stdout]    |            ------------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub print: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ExemplifyCliParams` has a derived impl for the trait `Clone`, 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] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/layers/application/cli_params.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | /     #[clap(short)]
[INFO] [stdout] 6 | |     pub source_directory: String,
[INFO] [stdout]   | |________________________________^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exemplify` (bin "exemplify" test) due to 6 previous errors; 1 warning emitted
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/layers/application/cli_params.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | /     #[clap(short)]
[INFO] [stdout] 9 | |     pub extensions: Vec<String>,
[INFO] [stdout]   | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[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/layers/application/cli_params.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     #[clap(long, default_value="##exemplify-start##")]
[INFO] [stdout] 15 | |     pub start_token: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/layers/application/cli_params.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     #[clap(long, default_value="##exemplify-end##")]
[INFO] [stdout] 18 | |     pub end_token: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/layers/application/cli_params.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     #[clap(long, default_value="##exemplify-callout##")]
[INFO] [stdout] 21 | |     pub callout_token: String,
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/layers/application/cli_params.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     #[clap(short,about="Folder to generate example files into. If this parameter is not provided, examples are printed to stdout")]
[INFO] [stdout] 27 | |     pub output_folder: Option<String>,
[INFO] [stdout]    | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `print` is never read
[INFO] [stdout]   --> src/layers/application/cli_params.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout]  4 | pub struct ExemplifyCliParams {
[INFO] [stdout]    |            ------------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub print: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ExemplifyCliParams` has a derived impl for the trait `Clone`, 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] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]  --> src/layers/application/cli_params.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | /     #[clap(short)]
[INFO] [stdout] 6 | |     pub source_directory: 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/layers/application/cli_params.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | /     #[clap(short)]
[INFO] [stdout] 9 | |     pub extensions: Vec<String>,
[INFO] [stdout]   | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/layers/application/cli_params.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | /     #[clap(long, default_value="##exemplify-start##")]
[INFO] [stdout] 15 | |     pub start_token: String,
[INFO] [stdout]    | |___________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/layers/application/cli_params.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     #[clap(long, default_value="##exemplify-end##")]
[INFO] [stdout] 18 | |     pub end_token: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exemplify` (bin "exemplify") due to 6 previous errors; 1 warning emitted
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/layers/application/cli_params.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     #[clap(long, default_value="##exemplify-callout##")]
[INFO] [stdout] 21 | |     pub callout_token: String,
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/layers/application/cli_params.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     #[clap(short,about="Folder to generate example files into. If this parameter is not provided, examples are printed to stdout")]
[INFO] [stdout] 27 | |     pub output_folder: Option<String>,
[INFO] [stdout]    | |_____________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3a53bb672785c9ef3a13f091aa01ba23429b280fd1ddaa012c6c3c78b840cac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a53bb672785c9ef3a13f091aa01ba23429b280fd1ddaa012c6c3c78b840cac4", kill_on_drop: false }`
[INFO] [stdout] 3a53bb672785c9ef3a13f091aa01ba23429b280fd1ddaa012c6c3c78b840cac4
