[INFO] cloning repository https://github.com/DogeCN/Lexi-DB
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DogeCN/Lexi-DB" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDogeCN%2FLexi-DB", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDogeCN%2FLexi-DB'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 62b0586e3c6d51d4d1950e7224bbe22a390fae25
[INFO] checking DogeCN/Lexi-DB against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDogeCN%2FLexi-DB" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/DogeCN/Lexi-DB
[INFO] finished tweaking git repo https://github.com/DogeCN/Lexi-DB
[INFO] tweaked toml for git repo https://github.com/DogeCN/Lexi-DB written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/DogeCN/Lexi-DB 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 git repo https://github.com/DogeCN/Lexi-DB 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ab0584be96fc04e2417f87be044835cb8786e0e758b909c1be87ed6834553aac
[INFO] running `Command { std: "docker" "start" "-a" "ab0584be96fc04e2417f87be044835cb8786e0e758b909c1be87ed6834553aac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab0584be96fc04e2417f87be044835cb8786e0e758b909c1be87ed6834553aac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab0584be96fc04e2417f87be044835cb8786e0e758b909c1be87ed6834553aac", kill_on_drop: false }`
[INFO] [stdout] ab0584be96fc04e2417f87be044835cb8786e0e758b909c1be87ed6834553aac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 12e57c0f395fe1c188665fedef512a64b622aaa468114e6fc83e1178cc4cb92b
[INFO] running `Command { std: "docker" "start" "-a" "12e57c0f395fe1c188665fedef512a64b622aaa468114e6fc83e1178cc4cb92b", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.13.2
[INFO] [stderr]     Checking serialization v0.3.0 (/opt/rustwide/workdir/serialization)
[INFO] [stderr]    Compiling indoc v2.0.6
[INFO] [stderr]     Checking unindent v0.2.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling cc v1.2.26
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling pyo3-build-config v0.25.0
[INFO] [stderr]    Compiling lzma-sys v0.1.20
[INFO] [stderr]     Checking xz2 v0.1.7
[INFO] [stderr]     Checking db v0.2.0 (/opt/rustwide/workdir/db)
[INFO] [stderr]    Compiling pyo3-macros-backend v0.25.0
[INFO] [stderr]    Compiling pyo3-ffi v0.25.0
[INFO] [stderr]    Compiling pyo3 v0.25.0
[INFO] [stderr]    Compiling pyo3-macros v0.25.0
[INFO] [stderr]     Checking entry v0.1.0 (/opt/rustwide/workdir/entry)
[INFO] [stderr]     Checking reader v0.3.1 (/opt/rustwide/workdir/reader)
[INFO] [stderr]     Checking creator v0.1.0 (/opt/rustwide/workdir/creator)
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> reader/src/lib.rs:44:49
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn find(&self, py: Python, target: &str) -> Option<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<Vec<String>, Infallible>
[INFO] [stdout]   --> reader/src/lib.rs:61:66
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn filter(&self, py: Python, word: &str, seps: Vec<char>) -> Vec<String> {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> reader/src/lib.rs:88:25
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn random(&self) -> Option<String> {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Infallible>
[INFO] [stdout]   --> reader/src/lib.rs:44:49
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn find(&self, py: Python, target: &str) -> Option<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 `reader` (lib test) due to 3 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<String>, Infallible>
[INFO] [stdout]   --> reader/src/lib.rs:61:66
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn filter(&self, py: Python, word: &str, seps: Vec<char>) -> 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<Option<String>, Infallible>
[INFO] [stdout]   --> reader/src/lib.rs:88:25
[INFO] [stdout]    |
[INFO] [stdout] 88 |     fn random(&self) -> Option<String> {
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `reader` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "12e57c0f395fe1c188665fedef512a64b622aaa468114e6fc83e1178cc4cb92b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12e57c0f395fe1c188665fedef512a64b622aaa468114e6fc83e1178cc4cb92b", kill_on_drop: false }`
[INFO] [stdout] 12e57c0f395fe1c188665fedef512a64b622aaa468114e6fc83e1178cc4cb92b