[INFO] cloning repository https://github.com/colobas/rust-vocab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/colobas/rust-vocab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolobas%2Frust-vocab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolobas%2Frust-vocab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5a88ff38ef77ea37d84554e664b51f6c0cc5f40
[INFO] checking colobas/rust-vocab 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%2Fcolobas%2Frust-vocab" "/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/colobas/rust-vocab
[INFO] finished tweaking git repo https://github.com/colobas/rust-vocab
[INFO] tweaked toml for git repo https://github.com/colobas/rust-vocab written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/colobas/rust-vocab 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/colobas/rust-vocab 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] 7a55c7bac27185d897c5bb8d9a1ec862944c4def87a5c05c6837870e172dd730
[INFO] running `Command { std: "docker" "start" "-a" "7a55c7bac27185d897c5bb8d9a1ec862944c4def87a5c05c6837870e172dd730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a55c7bac27185d897c5bb8d9a1ec862944c4def87a5c05c6837870e172dd730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a55c7bac27185d897c5bb8d9a1ec862944c4def87a5c05c6837870e172dd730", kill_on_drop: false }`
[INFO] [stdout] 7a55c7bac27185d897c5bb8d9a1ec862944c4def87a5c05c6837870e172dd730
[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] 055be87e90cd2bcbafbd5d705789e849bc130603158e0034ebf05c8c5d683836
[INFO] running `Command { std: "docker" "start" "-a" "055be87e90cd2bcbafbd5d705789e849bc130603158e0034ebf05c8c5d683836", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling once_cell v1.20.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling unicode-ident v1.0.17
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling indoc v2.0.5
[INFO] [stderr]     Checking unindent v0.2.3
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling pyo3-build-config v0.23.4
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling pyo3-ffi v0.23.4
[INFO] [stderr]    Compiling pyo3-macros-backend v0.23.4
[INFO] [stderr]    Compiling pyo3 v0.23.4
[INFO] [stderr]    Compiling pyo3-macros v0.23.4
[INFO] [stderr]     Checking rust-vocab v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `rust-vocab` (lib test) due to 4 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<(String, i32)>, Infallible>
[INFO] [stdout]   --> src/lib.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn items(&self) -> Vec<(String, i32)> {
[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<i32, Infallible>
[INFO] [stdout]   --> src/lib.rs:55:36
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn get_default_index(&self) -> i32 {
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<String>, Infallible>
[INFO] [stdout]   --> src/lib.rs:59:23
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn keys(&self) -> Vec<String> {
[INFO] [stdout]    |                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<i32>, Infallible>
[INFO] [stdout]   --> src/lib.rs:64:25
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn values(&self) -> Vec<i32> {
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<(String, i32)>, Infallible>
[INFO] [stdout]   --> src/lib.rs:46:24
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn items(&self) -> Vec<(String, i32)> {
[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<i32, Infallible>
[INFO] [stdout]   --> src/lib.rs:55:36
[INFO] [stdout]    |
[INFO] [stdout] 55 |     fn get_default_index(&self) -> i32 {
[INFO] [stdout]    |                                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<String>, Infallible>
[INFO] [stdout]   --> src/lib.rs:59:23
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn keys(&self) -> Vec<String> {
[INFO] [stdout]    |                       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<i32>, Infallible>
[INFO] [stdout]   --> src/lib.rs:64:25
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn values(&self) -> Vec<i32> {
[INFO] [stdout]    |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-vocab` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "055be87e90cd2bcbafbd5d705789e849bc130603158e0034ebf05c8c5d683836", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "055be87e90cd2bcbafbd5d705789e849bc130603158e0034ebf05c8c5d683836", kill_on_drop: false }`
[INFO] [stdout] 055be87e90cd2bcbafbd5d705789e849bc130603158e0034ebf05c8c5d683836