[INFO] fetching crate polyhorn 0.4.1...
[INFO] building polyhorn-0.4.1 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate polyhorn 0.4.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate polyhorn 0.4.1
[INFO] finished tweaking crates.io crate polyhorn 0.4.1
[INFO] tweaked toml for crates.io crate polyhorn 0.4.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate polyhorn 0.4.1 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate polyhorn 0.4.1 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--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]  Downloading crates ...
[INFO] [stderr]   Downloaded polyhorn-macros v0.4.0
[INFO] [stderr]   Downloaded ordered-float v1.1.0
[INFO] [stderr]   Downloaded polyhorn-build-android v0.4.0
[INFO] [stderr]   Downloaded polyhorn-ui-macros v0.4.0
[INFO] [stderr]   Downloaded strum v0.19.5
[INFO] [stderr]   Downloaded polyhorn-ui v0.4.0
[INFO] [stderr]   Downloaded polyhorn-build-ios v0.4.0
[INFO] [stderr]   Downloaded semver-parser v0.10.1
[INFO] [stderr]   Downloaded polyhorn-ios v0.4.0
[INFO] [stderr]   Downloaded cargo-lock v6.0.0
[INFO] [stderr]   Downloaded addr2line v0.14.0
[INFO] [stderr]   Downloaded strum_macros v0.19.4
[INFO] [stderr]   Downloaded palette_derive v0.5.0
[INFO] [stderr]   Downloaded as-any v0.2.0
[INFO] [stderr]   Downloaded combine v4.4.0
[INFO] [stderr]   Downloaded palette v0.5.0
[INFO] [stderr]   Downloaded casco v0.4.0
[INFO] [stderr]   Downloaded polyhorn-ios-sys v0.4.0
[INFO] [stderr]   Downloaded bindgen v0.55.1
[INFO] [stderr]   Downloaded paste v1.0.3
[INFO] [stderr]   Downloaded libloading v0.6.5
[INFO] [stderr]   Downloaded polyhorn-core v0.4.0
[INFO] [stderr]   Downloaded polyhorn-android-sys v0.4.0
[INFO] [stderr]   Downloaded polyhorn-android v0.4.0
[INFO] [stderr]   Downloaded polyhorn-build v0.4.0
[INFO] [stderr]   Downloaded ucd-trie v0.1.3
[INFO] [stderr]   Downloaded fsize v0.1.0
[INFO] [stderr]   Downloaded polyhorn-yoga v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c324722e5775ea6a64e5eab04beca6942a33166aeaf5b90e8311a0ded6f9e21e
[INFO] running `Command { std: "docker" "start" "-a" "c324722e5775ea6a64e5eab04beca6942a33166aeaf5b90e8311a0ded6f9e21e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c324722e5775ea6a64e5eab04beca6942a33166aeaf5b90e8311a0ded6f9e21e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c324722e5775ea6a64e5eab04beca6942a33166aeaf5b90e8311a0ded6f9e21e", kill_on_drop: false }`
[INFO] [stdout] c324722e5775ea6a64e5eab04beca6942a33166aeaf5b90e8311a0ded6f9e21e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f373491633b6ed61ec3c8580c18fc986f1cb241be1e8f87bc911277656c2dc77
[INFO] running `Command { std: "docker" "start" "-a" "f373491633b6ed61ec3c8580c18fc986f1cb241be1e8f87bc911277656c2dc77", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling futures-sink v0.3.8
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]    Compiling futures-core v0.3.8
[INFO] [stderr]    Compiling futures-io v0.3.8
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling tinyvec v1.1.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling futures-channel v0.3.8
[INFO] [stderr]    Compiling futures-task v0.3.8
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling form_urlencoded v1.0.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling semver-parser v0.10.1
[INFO] [stdout] error[E0658]: custom inner attributes are unstable
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/semver-parser-0.10.1/src/generated.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![rustfmt::skip]
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #54726 <https://github.com/rust-lang/rust/issues/54726> for more information
[INFO] [stdout]   = help: add `#![feature(custom_inner_attributes)]` to the crate attributes to enable
[INFO] [stdout]   = note: this compiler was built on 2025-09-28; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling polyhorn-macros v0.4.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `semver-parser` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f373491633b6ed61ec3c8580c18fc986f1cb241be1e8f87bc911277656c2dc77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f373491633b6ed61ec3c8580c18fc986f1cb241be1e8f87bc911277656c2dc77", kill_on_drop: false }`
[INFO] [stdout] f373491633b6ed61ec3c8580c18fc986f1cb241be1e8f87bc911277656c2dc77