[INFO] fetching crate learner 0.9.0...
[INFO] checking learner-0.9.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate learner 0.9.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate learner 0.9.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate learner 0.9.0
[INFO] tweaked toml for crates.io crate learner 0.9.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate learner 0.9.0 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 learner 0.9.0 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] 412696f2f76a4c93749f1c430271786d39ff5a2198c15d06456447a9e3c680f1
[INFO] running `Command { std: "docker" "start" "-a" "412696f2f76a4c93749f1c430271786d39ff5a2198c15d06456447a9e3c680f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "412696f2f76a4c93749f1c430271786d39ff5a2198c15d06456447a9e3c680f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "412696f2f76a4c93749f1c430271786d39ff5a2198c15d06456447a9e3c680f1", kill_on_drop: false }`
[INFO] [stdout] 412696f2f76a4c93749f1c430271786d39ff5a2198c15d06456447a9e3c680f1
[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] a52d8c536d8381e0a9bb264b155e3a5c892935cf88c9f1f67ac2af088933c6a3
[INFO] running `Command { std: "docker" "start" "-a" "a52d8c536d8381e0a9bb264b155e3a5c892935cf88c9f1f67ac2af088933c6a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.89
[INFO] [stderr]    Compiling libc v0.2.164
[INFO] [stderr]     Checking once_cell v1.20.2
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling shlex v1.3.0
[INFO] [stderr]    Compiling serde v1.0.215
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking bytes v1.8.0
[INFO] [stderr]     Checking itoa v1.0.13
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking litemap v0.7.4
[INFO] [stderr]     Checking writeable v0.5.5
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]     Checking icu_locid_transform_data v1.5.0
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]     Checking rustls-pki-types v1.10.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]     Checking icu_properties_data v1.5.0
[INFO] [stderr]    Compiling cc v1.2.1
[INFO] [stderr]    Compiling httparse v1.9.5
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking untrusted v0.9.0
[INFO] [stderr]     Checking utf8_iter v1.0.4
[INFO] [stderr]     Checking write16 v1.0.0
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling rustls v0.23.18
[INFO] [stderr]     Checking utf16_iter v1.0.5
[INFO] [stderr]     Checking icu_normalizer_data v1.5.0
[INFO] [stderr]     Checking http v1.1.0
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]    Compiling pkg-config v0.3.31
[INFO] [stderr]     Checking bitflags v2.6.0
[INFO] [stderr]     Checking iana-time-zone v0.1.61
[INFO] [stderr]     Checking equivalent v1.0.1
[INFO] [stderr]     Checking hashbrown v0.15.1
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]     Checking percent-encoding v2.3.1
[INFO] [stderr]     Checking zeroize v1.8.1
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking form_urlencoded v1.2.1
[INFO] [stderr]     Checking adler2 v2.0.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking ryu v1.0.18
[INFO] [stderr]     Checking socket2 v0.5.7
[INFO] [stderr]     Checking mio v1.0.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking indexmap v2.6.0
[INFO] [stderr]     Checking powerfmt v0.2.0
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]    Compiling serde_json v1.0.133
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking miniz_oxide v0.8.0
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking webpki-roots v0.26.7
[INFO] [stderr]     Checking crc32fast v1.4.2
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]     Checking http-body v1.0.1
[INFO] [stderr]     Checking time-core v0.1.2
[INFO] [stderr]    Compiling rustix v0.38.41
[INFO] [stderr]     Checking winnow v0.6.20
[INFO] [stderr]     Checking num-conv v0.1.0
[INFO] [stderr]     Checking fallible-iterator v0.3.0
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking option-ext v0.2.0
[INFO] [stderr]    Compiling thiserror v2.0.3
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking flate2 v1.0.35
[INFO] [stderr]     Checking hashlink v0.9.1
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking dirs-sys v0.4.1
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking crossbeam-channel v0.5.13
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking rustls-pemfile v2.2.0
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking sync_wrapper v1.0.2
[INFO] [stderr]     Checking encoding_rs v0.8.35
[INFO] [stderr]     Checking ipnet v2.10.1
[INFO] [stderr]    Compiling anyhow v1.0.93
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking time v0.3.36
[INFO] [stderr]     Checking linux-raw-sys v0.4.14
[INFO] [stderr]    Compiling ring v0.17.8
[INFO] [stderr]    Compiling libsqlite3-sys v0.30.1
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking rangemap v1.5.1
[INFO] [stderr]     Checking weezl v0.1.8
[INFO] [stderr]     Checking md-5 v0.10.6
[INFO] [stderr]     Checking dirs v5.0.1
[INFO] [stderr]     Checking fastrand v2.2.0
[INFO] [stderr]     Checking regex-automata v0.4.8
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking tempfile v3.14.0
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking rustls-webpki v0.102.8
[INFO] [stderr]    Compiling synstructure v0.13.1
[INFO] [stderr]    Compiling serde_derive v1.0.215
[INFO] [stderr]    Compiling zerovec-derive v0.10.3
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling icu_provider_macros v1.5.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling async-stream-impl v0.3.6
[INFO] [stderr]    Compiling thiserror-impl v2.0.3
[INFO] [stderr]    Compiling async-trait v0.1.83
[INFO] [stderr]    Compiling tracing-test-macro v0.2.5
[INFO] [stderr]    Compiling zerofrom-derive v0.1.5
[INFO] [stderr]    Compiling yoke-derive v0.7.5
[INFO] [stderr]     Checking async-stream v0.3.6
[INFO] [stderr]     Checking tokio v1.41.1
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking zerofrom v0.1.5
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking yoke v0.7.5
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking zerovec v0.10.4
[INFO] [stderr]     Checking tinystr v0.7.6
[INFO] [stderr]     Checking icu_collections v1.5.0
[INFO] [stderr]     Checking icu_locid v1.5.0
[INFO] [stderr]     Checking tracing-test v0.2.5
[INFO] [stderr]     Checking icu_provider v1.5.0
[INFO] [stderr]     Checking icu_locid_transform v1.5.0
[INFO] [stderr]     Checking icu_properties v1.5.1
[INFO] [stderr]     Checking http-body-util v0.1.2
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]     Checking toml_datetime v0.6.8
[INFO] [stderr]     Checking serde_spanned v0.6.8
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking quick-xml v0.37.1
[INFO] [stderr]     Checking hyper v1.5.1
[INFO] [stderr]     Checking tokio-rustls v0.26.0
[INFO] [stderr]     Checking tokio-stream v0.1.16
[INFO] [stderr]     Checking toml_edit v0.22.22
[INFO] [stderr]     Checking icu_normalizer v1.5.0
[INFO] [stderr]     Checking tokio-test v0.4.4
[INFO] [stderr]     Checking hyper-util v0.1.10
[INFO] [stderr]     Checking idna_adapter v1.2.0
[INFO] [stderr]     Checking idna v1.0.3
[INFO] [stderr]     Checking lopdf v0.34.0
[INFO] [stderr]     Checking url v2.5.4
[INFO] [stderr]     Checking rusqlite v0.32.1
[INFO] [stderr]     Checking hyper-rustls v0.27.3
[INFO] [stderr]     Checking toml v0.8.19
[INFO] [stderr]     Checking reqwest v0.12.9
[INFO] [stderr]     Checking tokio-rusqlite v0.6.0
[INFO] [stderr]     Checking learner v0.9.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::path::PathBuf, Infallible>
[INFO] [stdout]   --> tests/workflows/database_operations/mod.rs:57:31
[INFO] [stdout]    |
[INFO] [stdout] 57 |   assert!(paper.download_pdf(&PathBuf::from_str(".").unwrap()).await.is_err());
[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 `learner` (test "lib") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a52d8c536d8381e0a9bb264b155e3a5c892935cf88c9f1f67ac2af088933c6a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a52d8c536d8381e0a9bb264b155e3a5c892935cf88c9f1f67ac2af088933c6a3", kill_on_drop: false }`
[INFO] [stdout] a52d8c536d8381e0a9bb264b155e3a5c892935cf88c9f1f67ac2af088933c6a3