[INFO] fetching crate keramics-python 0.0.0...
[INFO] checking keramics-python-0.0.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate keramics-python 0.0.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate keramics-python 0.0.0
[INFO] finished tweaking crates.io crate keramics-python 0.0.0
[INFO] tweaked toml for crates.io crate keramics-python 0.0.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate keramics-python 0.0.0 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 keramics-python 0.0.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 9b82a4b7343453c42c9db3e597435362221addb713f96aec343a50ea4aaa78a4
[INFO] running `Command { std: "docker" "start" "-a" "9b82a4b7343453c42c9db3e597435362221addb713f96aec343a50ea4aaa78a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b82a4b7343453c42c9db3e597435362221addb713f96aec343a50ea4aaa78a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b82a4b7343453c42c9db3e597435362221addb713f96aec343a50ea4aaa78a4", kill_on_drop: false }`
[INFO] [stdout] 9b82a4b7343453c42c9db3e597435362221addb713f96aec343a50ea4aaa78a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] facf21cac13bfdebcb594b1ab70c55280039140351b2e675559b784eb5194a47
[INFO] running `Command { std: "docker" "start" "-a" "facf21cac13bfdebcb594b1ab70c55280039140351b2e675559b784eb5194a47", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.13.3
[INFO] [stderr]     Checking keramics-core v0.0.0
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]     Checking keramics-checksums v0.0.0
[INFO] [stderr]     Checking unindent v0.2.4
[INFO] [stderr]    Compiling thiserror-impl v2.0.16
[INFO] [stderr]    Compiling darling_core v0.21.3
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]     Checking keramics-types v0.0.0
[INFO] [stderr]     Checking keramics-sigscan v0.0.0
[INFO] [stderr]     Checking keramics-encodings v0.0.0
[INFO] [stderr]     Checking keramics-datetime v0.0.0
[INFO] [stderr]    Compiling pyo3-build-config v0.26.0
[INFO] [stderr]    Compiling thiserror v2.0.16
[INFO] [stderr]     Checking pest v2.8.2
[INFO] [stderr]    Compiling pyo3-macros-backend v0.26.0
[INFO] [stderr]    Compiling pyo3-ffi v0.26.0
[INFO] [stderr]    Compiling pyo3 v0.26.0
[INFO] [stderr]    Compiling pest_meta v2.8.2
[INFO] [stderr]    Compiling darling_macro v0.21.3
[INFO] [stderr]    Compiling darling v0.21.3
[INFO] [stderr]    Compiling keramics-layout-map v0.0.0
[INFO] [stderr]    Compiling pest_generator v2.8.2
[INFO] [stderr]     Checking keramics-compression v0.0.0
[INFO] [stderr]    Compiling pest_derive v2.8.2
[INFO] [stderr]     Checking keramics-formats v0.0.0
[INFO] [stderr]    Compiling pyo3-macros v0.26.0
[INFO] [stderr]     Checking keramics-vfs v0.0.0
[INFO] [stderr]     Checking keramics-python v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `pyo3::exceptions::PyRuntimeError`
[INFO] [stdout]   --> src/datetime.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use pyo3::exceptions::PyRuntimeError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VfsFileType`
[INFO] [stdout]   --> src/vfs.rs:20:43
[INFO] [stdout]    |
[INFO] [stdout] 20 |     VfsFileEntry, VfsFileSystemReference, VfsFileType, VfsLocation, VfsPath, VfsResolver,
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `pyo3::exceptions::PyRuntimeError`
[INFO] [stdout]   --> src/datetime.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use pyo3::exceptions::PyRuntimeError;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VfsFileType`
[INFO] [stdout]   --> src/vfs.rs:20:43
[INFO] [stdout]    |
[INFO] [stdout] 20 |     VfsFileEntry, VfsFileSystemReference, VfsFileType, VfsLocation, VfsPath, VfsResolver,
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `file_system` is never read
[INFO] [stdout]   --> src/vfs.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | struct PyVfsFileSystem {
[INFO] [stdout]    |        --------------- field in this struct
[INFO] [stdout] 82 |     file_system: VfsFileSystemReference,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PyVfsFileSystem` 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<std::string::String, Infallible>
[INFO] [stdout]    --> src/vfs.rs:224:32
[INFO] [stdout]     |
[INFO] [stdout] 224 |     pub fn to_string(&self) -> 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 `keramics-python` (lib) due to 1 previous error; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field `file_system` is never read
[INFO] [stdout]   --> src/vfs.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | struct PyVfsFileSystem {
[INFO] [stdout]    |        --------------- field in this struct
[INFO] [stdout] 82 |     file_system: VfsFileSystemReference,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PyVfsFileSystem` 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<std::string::String, Infallible>
[INFO] [stdout]    --> src/vfs.rs:224:32
[INFO] [stdout]     |
[INFO] [stdout] 224 |     pub fn to_string(&self) -> 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 `keramics-python` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "facf21cac13bfdebcb594b1ab70c55280039140351b2e675559b784eb5194a47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "facf21cac13bfdebcb594b1ab70c55280039140351b2e675559b784eb5194a47", kill_on_drop: false }`
[INFO] [stdout] facf21cac13bfdebcb594b1ab70c55280039140351b2e675559b784eb5194a47