[INFO] fetching crate file_endec 1.0.1...
[INFO] testing file_endec-1.0.1 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate file_endec 1.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate file_endec 1.0.1
[INFO] finished tweaking crates.io crate file_endec 1.0.1
[INFO] tweaked toml for crates.io crate file_endec 1.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate file_endec 1.0.1 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate file_endec 1.0.1 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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3631508fe226b9598b0fcb4f34ec0f36e57ac3c149983af011b3440309782bf
[INFO] running `Command { std: "docker" "start" "-a" "a3631508fe226b9598b0fcb4f34ec0f36e57ac3c149983af011b3440309782bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3631508fe226b9598b0fcb4f34ec0f36e57ac3c149983af011b3440309782bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3631508fe226b9598b0fcb4f34ec0f36e57ac3c149983af011b3440309782bf", kill_on_drop: false }`
[INFO] [stdout] a3631508fe226b9598b0fcb4f34ec0f36e57ac3c149983af011b3440309782bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73d37cb15e96a9ac109a2c52ae81625b65c34f024f7e0ff99cdcd23d32fe3225
[INFO] running `Command { std: "docker" "start" "-a" "73d37cb15e96a9ac109a2c52ae81625b65c34f024f7e0ff99cdcd23d32fe3225", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.50
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling terminal_size v0.1.15
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling unicode-segmentation v1.7.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]    Compiling cipher v0.2.5
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.1
[INFO] [stderr]    Compiling cc v1.0.65
[INFO] [stderr]    Compiling number_prefix v0.3.0
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling alloc-stdlib v0.2.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling ring v0.16.16
[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 2025-08-13; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling blake2-rfc v0.2.18
[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" "73d37cb15e96a9ac109a2c52ae81625b65c34f024f7e0ff99cdcd23d32fe3225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73d37cb15e96a9ac109a2c52ae81625b65c34f024f7e0ff99cdcd23d32fe3225", kill_on_drop: false }`
[INFO] [stdout] 73d37cb15e96a9ac109a2c52ae81625b65c34f024f7e0ff99cdcd23d32fe3225