[INFO] fetching crate kstring 2.0.2...
[INFO] checking kstring-2.0.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate kstring 2.0.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate kstring 2.0.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate kstring 2.0.2
[INFO] tweaked toml for crates.io crate kstring 2.0.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate kstring 2.0.2 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] crate crates.io crate kstring 2.0.2 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] 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] 7ac83442f70a9bc033bd916bc82cb868a4195e465787e1ca2e14a516830611c4
[INFO] running `Command { std: "docker" "start" "-a" "7ac83442f70a9bc033bd916bc82cb868a4195e465787e1ca2e14a516830611c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ac83442f70a9bc033bd916bc82cb868a4195e465787e1ca2e14a516830611c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ac83442f70a9bc033bd916bc82cb868a4195e465787e1ca2e14a516830611c4", kill_on_drop: false }`
[INFO] [stdout] 7ac83442f70a9bc033bd916bc82cb868a4195e465787e1ca2e14a516830611c4
[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] 481ac23941244d4dec38ebff41d4ca5db7b78ec7dcd7ffd2fb0dc980f86fc9a3
[INFO] running `Command { std: "docker" "start" "-a" "481ac23941244d4dec38ebff41d4ca5db7b78ec7dcd7ffd2fb0dc980f86fc9a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling syn v1.0.90
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling libm v0.2.7
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking anstyle v1.0.0
[INFO] [stderr]    Compiling quote v1.0.17
[INFO] [stderr]     Checking clap_lex v0.5.0
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]     Checking once_cell v1.17.2
[INFO] [stderr]     Checking kstring v2.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking clap_builder v4.3.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stdout] error: this type will no longer be must used: Result<string::KStringBase<B>, Infallible>
[INFO] [stdout]    --> src/string.rs:292:53
[INFO] [stdout]     |
[INFO] [stdout] 292 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  _____________________________________________________^
[INFO] [stdout] 293 | |         Ok(Self::from_ref(s))
[INFO] [stdout] 294 | |     }
[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<string::KStringBase<B>, Infallible>
[INFO] [stdout]    --> src/string.rs:293:9
[INFO] [stdout]     |
[INFO] [stdout] 293 |         Ok(Self::from_ref(s))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<string_cow::KStringCowBase<'_, B>, Infallible>
[INFO] [stdout]    --> src/string_cow.rs:349:53
[INFO] [stdout]     |
[INFO] [stdout] 349 |       fn from_str(s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  _____________________________________________________^
[INFO] [stdout] 350 | |         Ok(Self::from_string(s.into()))
[INFO] [stdout] 351 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<string_cow::KStringCowBase<'_, B>, Infallible>
[INFO] [stdout]    --> src/string_cow.rs:350:9
[INFO] [stdout]     |
[INFO] [stdout] 350 |         Ok(Self::from_string(s.into()))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kstring` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "481ac23941244d4dec38ebff41d4ca5db7b78ec7dcd7ffd2fb0dc980f86fc9a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "481ac23941244d4dec38ebff41d4ca5db7b78ec7dcd7ffd2fb0dc980f86fc9a3", kill_on_drop: false }`
[INFO] [stdout] 481ac23941244d4dec38ebff41d4ca5db7b78ec7dcd7ffd2fb0dc980f86fc9a3
