[INFO] fetching crate langram_train 0.11.1...
[INFO] checking langram_train-0.11.1 against 1.95.0 for pr-155915
[INFO] extracting crate langram_train 0.11.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate langram_train 0.11.1
[INFO] finished tweaking crates.io crate langram_train 0.11.1
[INFO] tweaked toml for crates.io crate langram_train 0.11.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate langram_train 0.11.1 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 langram_train 0.11.1 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded array_buf v0.1.1
[INFO] [stderr]   Downloaded alphabet_detector_macros v0.12.1
[INFO] [stderr]   Downloaded concat_const v0.2.0
[INFO] [stderr]   Downloaded cap v0.1.2
[INFO] [stderr]   Downloaded langram v0.11.1
[INFO] [stderr]   Downloaded serde_map v0.2.0
[INFO] [stderr]   Downloaded arraystring v0.3.0
[INFO] [stderr]   Downloaded clap v4.5.57
[INFO] [stderr]   Downloaded atoi_simd v0.18.1
[INFO] [stderr]   Downloaded alphabet_detector v0.12.1
[INFO] [stderr]   Downloaded serde_encom v0.4.0
[INFO] [stderr]   Downloaded clap_builder v4.5.57
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c505e75ac13c3c7797165fe5ed11c742ab5fa8b336c8c330bac5dba965cfd062
[INFO] running `Command { std: "docker" "start" "-a" "c505e75ac13c3c7797165fe5ed11c742ab5fa8b336c8c330bac5dba965cfd062", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c505e75ac13c3c7797165fe5ed11c742ab5fa8b336c8c330bac5dba965cfd062", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c505e75ac13c3c7797165fe5ed11c742ab5fa8b336c8c330bac5dba965cfd062", kill_on_drop: false }`
[INFO] [stdout] c505e75ac13c3c7797165fe5ed11c742ab5fa8b336c8c330bac5dba965cfd062
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38110c8d27e0c516d68f9451ce35fa85cbd20b02f8526e671569d8155246d1db
[INFO] running `Command { std: "docker" "start" "-a" "38110c8d27e0c516d68f9451ce35fa85cbd20b02f8526e671569d8155246d1db", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.180
[INFO] [stderr]     Checking arraystring v0.3.0
[INFO] [stderr]    Compiling ptr_meta_derive v0.3.1
[INFO] [stderr]     Checking tinystr v0.8.2
[INFO] [stderr]     Checking zerotrie v0.2.3
[INFO] [stderr]    Compiling bytecheck_derive v0.8.2
[INFO] [stderr]    Compiling zerocopy v0.8.39
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]     Checking simdutf8 v0.1.5
[INFO] [stderr]     Checking icu_locale_core v2.1.1
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking tinyvec v1.10.0
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking ptr_meta v0.3.1
[INFO] [stderr]     Checking rancor v0.1.1
[INFO] [stderr]    Compiling munge_macro v0.4.7
[INFO] [stderr]     Checking bytecheck v0.8.2
[INFO] [stderr]     Checking anstyle v1.0.13
[INFO] [stderr]     Checking anstream v0.6.21
[INFO] [stderr]     Checking rend v0.5.3
[INFO] [stderr]     Checking ahash v0.8.12
[INFO] [stderr]     Checking icu_provider v2.1.1
[INFO] [stderr]     Checking munge v0.4.7
[INFO] [stderr]     Checking unicode-normalization v0.1.25
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking icu_normalizer v2.1.1
[INFO] [stderr]    Compiling strum_macros v0.27.2
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]    Compiling rkyv_derive v0.8.14
[INFO] [stderr]     Checking strum v0.27.2
[INFO] [stderr]     Checking concat_const v0.2.0
[INFO] [stderr]     Checking clap_lex v0.7.7
[INFO] [stderr]     Checking array_buf v0.1.1
[INFO] [stderr]     Checking clap_builder v4.5.57
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]    Compiling clap_derive v4.5.55
[INFO] [stderr]     Checking regex v1.12.3
[INFO] [stderr]     Checking memmap2 v0.9.9
[INFO] [stderr]     Checking num_cpus v1.17.0
[INFO] [stderr]     Checking debug_unsafe v0.1.4
[INFO] [stderr]     Checking atoi_simd v0.16.1
[INFO] [stderr]     Checking fraction v0.15.3
[INFO] [stderr]     Checking serde_encom v0.4.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking atoi_simd v0.18.1
[INFO] [stderr]     Checking serde_map v0.2.0
[INFO] [stderr]     Checking cap v0.1.2
[INFO] [stderr]     Checking clap v4.5.57
[INFO] [stderr]    Compiling alphabet_detector_macros v0.12.1
[INFO] [stderr]     Checking rkyv v0.8.14
[INFO] [stderr]     Checking alphabet_detector v0.12.1
[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/alphabet_detector-0.12.1/src/lib.rs:37:37
[INFO] [stdout]    |
[INFO] [stdout] 37 | #![cfg_attr(feature = "files_read", feature(string_into_chars))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `alphabet_detector` (lib) due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "38110c8d27e0c516d68f9451ce35fa85cbd20b02f8526e671569d8155246d1db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38110c8d27e0c516d68f9451ce35fa85cbd20b02f8526e671569d8155246d1db", kill_on_drop: false }`
[INFO] [stdout] 38110c8d27e0c516d68f9451ce35fa85cbd20b02f8526e671569d8155246d1db