[INFO] fetching crate smol_buf 0.1.2...
[INFO] checking smol_buf-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate smol_buf 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate smol_buf 0.1.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate smol_buf 0.1.2
[INFO] tweaked toml for crates.io crate smol_buf 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate smol_buf 0.1.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 47 packages to latest compatible versions
[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] warning: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition
[INFO] [stderr] (in the `serde` dependency)
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 10e0c709699cad686c20fc4f5833f27539693ebc9a86eca5cbc5ff21837b68a9
[INFO] running `Command { std: "docker" "start" "-a" "10e0c709699cad686c20fc4f5833f27539693ebc9a86eca5cbc5ff21837b68a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "10e0c709699cad686c20fc4f5833f27539693ebc9a86eca5cbc5ff21837b68a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10e0c709699cad686c20fc4f5833f27539693ebc9a86eca5cbc5ff21837b68a9", kill_on_drop: false }`
[INFO] [stdout] 10e0c709699cad686c20fc4f5833f27539693ebc9a86eca5cbc5ff21837b68a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 90fb49dbf5f9d8d05206c3f404639a79bcddce013047a0e5cf6fdff53a7ed5c6
[INFO] running `Command { std: "docker" "start" "-a" "90fb49dbf5f9d8d05206c3f404639a79bcddce013047a0e5cf6fdff53a7ed5c6", kill_on_drop: false }`
[INFO] [stderr] warning: `default_features` is deprecated in favor of `default-features` and will not work in the 2024 edition
[INFO] [stderr] (in the `serde` dependency)
[INFO] [stderr]     Checking bit-vec v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking rustix v1.1.2
[INFO] [stderr]     Checking wait-timeout v0.2.1
[INFO] [stderr]     Checking smol_buf v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stdout] error: this type will no longer be must used: Result<Str16, Infallible>
[INFO] [stdout]    --> src/str16.rs:335:54
[INFO] [stdout]     |
[INFO] [stdout] 335 |       fn from_str(s: &str) -> Result<Str16, Self::Err> {
[INFO] [stdout]     |  ______________________________________________________^
[INFO] [stdout] 336 | |         Ok(Str16::from(s))
[INFO] [stdout] 337 | |     }
[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<Str16, Infallible>
[INFO] [stdout]    --> src/str16.rs:336:9
[INFO] [stdout]     |
[INFO] [stdout] 336 |         Ok(Str16::from(s))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Str24, Infallible>
[INFO] [stdout]    --> src/str24.rs:336:54
[INFO] [stdout]     |
[INFO] [stdout] 336 |       fn from_str(s: &str) -> Result<Str24, Self::Err> {
[INFO] [stdout]     |  ______________________________________________________^
[INFO] [stdout] 337 | |         Ok(Str24::from(s))
[INFO] [stdout] 338 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Str24, Infallible>
[INFO] [stdout]    --> src/str24.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 337 |         Ok(Str24::from(s))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `smol_buf` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "90fb49dbf5f9d8d05206c3f404639a79bcddce013047a0e5cf6fdff53a7ed5c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90fb49dbf5f9d8d05206c3f404639a79bcddce013047a0e5cf6fdff53a7ed5c6", kill_on_drop: false }`
[INFO] [stdout] 90fb49dbf5f9d8d05206c3f404639a79bcddce013047a0e5cf6fdff53a7ed5c6