[INFO] fetching crate univstring 0.4.3...
[INFO] testing univstring-0.4.3 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate univstring 0.4.3 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate univstring 0.4.3
[INFO] finished tweaking crates.io crate univstring 0.4.3
[INFO] tweaked toml for crates.io crate univstring 0.4.3 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate univstring 0.4.3 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] [stderr]       Adding widestring v0.4.3 (available: v1.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d955be18cecf437f783d340d88db4e255ae9ad6316609e61f0cd65b957ae0445
[INFO] running `Command { std: "docker" "start" "-a" "d955be18cecf437f783d340d88db4e255ae9ad6316609e61f0cd65b957ae0445", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d955be18cecf437f783d340d88db4e255ae9ad6316609e61f0cd65b957ae0445", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d955be18cecf437f783d340d88db4e255ae9ad6316609e61f0cd65b957ae0445", kill_on_drop: false }`
[INFO] [stdout] d955be18cecf437f783d340d88db4e255ae9ad6316609e61f0cd65b957ae0445
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39c8fc64141b8daf226b7f9e526b8aa107db7e84af9413e919afda5df1a665a8
[INFO] running `Command { std: "docker" "start" "-a" "39c8fc64141b8daf226b7f9e526b8aa107db7e84af9413e919afda5df1a665a8", kill_on_drop: false }`
[INFO] [stderr]    Compiling widestring v0.4.3
[INFO] [stderr]    Compiling univstring v0.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:175:107
[INFO] [stdout]     |
[INFO] [stdout] 175 | ...<CNulError>> { CString::new(WideCStr::to_string(self)?).map(Cow::Owned).map_err(Into::into) }
[INFO] [stdout]     |                                ------------------- ^^^^ expected `&UCStr<u32>`, found `&UCString<u16>`
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&widestring::UCStr<u32>`
[INFO] [stdout]                found reference `&widestring::UCString<u16>`
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/widestring-0.4.3/src/ucstr.rs:489:12
[INFO] [stdout]     |
[INFO] [stdout] 489 |     pub fn to_string(&self) -> Result<String, crate::FromUtf32Error> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `univstring` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "39c8fc64141b8daf226b7f9e526b8aa107db7e84af9413e919afda5df1a665a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39c8fc64141b8daf226b7f9e526b8aa107db7e84af9413e919afda5df1a665a8", kill_on_drop: false }`
[INFO] [stdout] 39c8fc64141b8daf226b7f9e526b8aa107db7e84af9413e919afda5df1a665a8
