[INFO] fetching crate lumen-python 0.5.0...
[INFO] checking lumen-python-0.5.0 against 1.95.0 for pr-155915
[INFO] extracting crate lumen-python 0.5.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate lumen-python 0.5.0
[INFO] finished tweaking crates.io crate lumen-python 0.5.0
[INFO] tweaked toml for crates.io crate lumen-python 0.5.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lumen-python 0.5.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate lumen-python 0.5.0 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" "+1.95.0" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libz-rs-sys v0.5.5
[INFO] [stderr]   Downloaded thiserrorctx v1.0.0
[INFO] [stderr]   Downloaded lumen-core v0.5.0
[INFO] [stderr]   Downloaded lumen-macros v0.5.0
[INFO] [stderr]   Downloaded lumen-nn v0.5.0
[INFO] [stderr]   Downloaded lumen-io v0.5.0
[INFO] [stderr]   Downloaded thiserrorctx-impl v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cfff84ff0f3eae6ee8c3365c9f9cbcde8e7544b28b2bcd7d90ce9aac856ffcd
[INFO] running `Command { std: "docker" "start" "-a" "6cfff84ff0f3eae6ee8c3365c9f9cbcde8e7544b28b2bcd7d90ce9aac856ffcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cfff84ff0f3eae6ee8c3365c9f9cbcde8e7544b28b2bcd7d90ce9aac856ffcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cfff84ff0f3eae6ee8c3365c9f9cbcde8e7544b28b2bcd7d90ce9aac856ffcd", kill_on_drop: false }`
[INFO] [stdout] 6cfff84ff0f3eae6ee8c3365c9f9cbcde8e7544b28b2bcd7d90ce9aac856ffcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ad5fb75648a03247cb37c8aa89cc99a054ba5c5750260ece766c0a2705ed0a9
[INFO] running `Command { std: "docker" "start" "-a" "0ad5fb75648a03247cb37c8aa89cc99a054ba5c5750260ece766c0a2705ed0a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.13.4
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling indexmap v2.12.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling zmij v1.0.6
[INFO] [stderr]     Checking zlib-rs v0.5.5
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking bitflags v2.9.3
[INFO] [stderr]     Checking bumpalo v3.19.1
[INFO] [stderr]     Checking libbz2-rs-sys v0.2.2
[INFO] [stderr]     Checking simd-adler32 v0.3.8
[INFO] [stderr]     Checking time v0.3.47
[INFO] [stderr]     Checking sha1 v0.10.6
[INFO] [stderr]     Checking aes v0.8.4
[INFO] [stderr]     Checking ppmd-rust v1.4.0
[INFO] [stderr]     Checking deflate64 v0.1.11
[INFO] [stderr]     Checking serde_json v1.0.148
[INFO] [stderr]     Checking memmap2 v0.9.9
[INFO] [stderr]     Checking bzip2 v0.6.1
[INFO] [stderr]     Checking unindent v0.2.4
[INFO] [stderr]     Checking zopfli v0.8.3
[INFO] [stderr]     Checking rustix v1.1.2
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling toml_edit v0.23.10+spec-1.0.0
[INFO] [stderr]     Checking rand_distr v0.5.1
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]    Compiling pyo3-build-config v0.27.2
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]     Checking libz-rs-sys v0.5.5
[INFO] [stderr]     Checking flate2 v1.1.5
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling cc v1.2.51
[INFO] [stderr]    Compiling proc-macro-crate v3.4.0
[INFO] [stderr]     Checking tempfile v3.23.0
[INFO] [stderr]    Compiling zstd-sys v2.0.16+zstd.1.5.7
[INFO] [stderr]    Compiling liblzma-sys v0.4.5
[INFO] [stderr]    Compiling pyo3-ffi v0.27.2
[INFO] [stderr]    Compiling pyo3-macros-backend v0.27.2
[INFO] [stderr]    Compiling pyo3 v0.27.2
[INFO] [stderr]     Checking liblzma v0.4.6
[INFO] [stderr]    Compiling zstd-safe v7.2.4
[INFO] [stderr]     Checking zstd v0.13.3
[INFO] [stderr]    Compiling thiserror-impl v2.0.16
[INFO] [stderr]    Compiling zeroize_derive v1.4.3
[INFO] [stderr]    Compiling thiserrorctx-impl v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling lumen-macros v0.5.0
[INFO] [stderr]    Compiling derive-new v0.7.0
[INFO] [stderr]     Checking zeroize v1.8.2
[INFO] [stderr]     Checking zip v4.6.1
[INFO] [stderr]     Checking thiserror v2.0.16
[INFO] [stderr]     Checking thiserrorctx v1.0.0
[INFO] [stderr]     Checking lumen-core v0.5.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/lumen-core-0.5.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(mapped_lock_guards)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pyo3-macros v0.27.2
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lumen-core` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0ad5fb75648a03247cb37c8aa89cc99a054ba5c5750260ece766c0a2705ed0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ad5fb75648a03247cb37c8aa89cc99a054ba5c5750260ece766c0a2705ed0a9", kill_on_drop: false }`
[INFO] [stdout] 0ad5fb75648a03247cb37c8aa89cc99a054ba5c5750260ece766c0a2705ed0a9