[INFO] fetching crate mdbook-chapter-zero 0.1.0...
[INFO] checking mdbook-chapter-zero-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate mdbook-chapter-zero 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate mdbook-chapter-zero 0.1.0
[INFO] finished tweaking crates.io crate mdbook-chapter-zero 0.1.0
[INFO] tweaked toml for crates.io crate mdbook-chapter-zero 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdbook-chapter-zero 0.1.0 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 mdbook-chapter-zero 0.1.0 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-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] bfa683e26116f0d25a3ba04fcbe8b249650863b56a5c5b13850661314eb8ad86
[INFO] running `Command { std: "docker" "start" "-a" "bfa683e26116f0d25a3ba04fcbe8b249650863b56a5c5b13850661314eb8ad86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfa683e26116f0d25a3ba04fcbe8b249650863b56a5c5b13850661314eb8ad86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfa683e26116f0d25a3ba04fcbe8b249650863b56a5c5b13850661314eb8ad86", kill_on_drop: false }`
[INFO] [stdout] bfa683e26116f0d25a3ba04fcbe8b249650863b56a5c5b13850661314eb8ad86
[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] 5dd7b7223931e7b1064a604d1023d6389f70bf4adc68989071ee120799d5d7bf
[INFO] running `Command { std: "docker" "start" "-a" "5dd7b7223931e7b1064a604d1023d6389f70bf4adc68989071ee120799d5d7bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking memchr v2.7.1
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]    Compiling rustix v0.38.31
[INFO] [stderr]     Checking bitflags v2.5.0
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]     Checking utf8parse v0.2.1
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking anstyle-parse v0.2.3
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking anstyle-query v1.0.2
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]     Checking colorchoice v1.0.0
[INFO] [stderr]     Checking anstream v0.6.13
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling serde_json v1.0.114
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling unicase v2.7.0
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking strsim v0.11.0
[INFO] [stderr]    Compiling syn v2.0.53
[INFO] [stderr]     Checking clap_lex v0.7.0
[INFO] [stderr]     Checking ryu v1.0.17
[INFO] [stderr]     Checking itoa v1.0.10
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]    Compiling pulldown-cmark v0.10.0
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking pulldown-cmark-escape v0.10.0
[INFO] [stderr]     Checking topological-sort v0.2.2
[INFO] [stderr]     Checking shlex v1.3.0
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking chrono v0.4.35
[INFO] [stderr]     Checking terminal_size v0.3.0
[INFO] [stderr]     Checking tempfile v3.10.1
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling pest v2.7.8
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking env_filter v0.1.0
[INFO] [stderr]     Checking env_logger v0.11.3
[INFO] [stderr]     Checking clap v4.5.3
[INFO] [stderr]     Checking clap_complete v4.5.1
[INFO] [stderr]     Checking opener v0.6.1
[INFO] [stderr]    Compiling pest_meta v2.7.8
[INFO] [stderr]    Compiling pest_generator v2.7.8
[INFO] [stderr]    Compiling pest_derive v2.7.8
[INFO] [stderr]     Checking toml v0.5.11
[INFO] [stderr]     Checking handlebars v5.1.0
[INFO] [stderr]     Checking mdbook v0.4.37
[INFO] [stderr]     Checking mdbook-chapter-zero v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `mdbook-chapter-zero` (lib) due to 2 previous errors
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, Vec<usize>>
[INFO] [stdout]   --> src/lib.rs:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |             cfg.levels = levels.try_into()?;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[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<Vec<usize>, Infallible>
[INFO] [stdout]   --> src/lib.rs:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |             cfg.levels = levels.try_into()?;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, Infallible>, Vec<usize>>
[INFO] [stdout]   --> src/lib.rs:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |             cfg.levels = levels.try_into()?;
[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<Vec<usize>, Infallible>
[INFO] [stdout]   --> src/lib.rs:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |             cfg.levels = levels.try_into()?;
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mdbook-chapter-zero` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "5dd7b7223931e7b1064a604d1023d6389f70bf4adc68989071ee120799d5d7bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dd7b7223931e7b1064a604d1023d6389f70bf4adc68989071ee120799d5d7bf", kill_on_drop: false }`
[INFO] [stdout] 5dd7b7223931e7b1064a604d1023d6389f70bf4adc68989071ee120799d5d7bf
