[INFO] fetching crate ringboard 0.12.2...
[INFO] testing ringboard-0.12.2 against 1.90.0 for beta-1.91-3
[INFO] extracting crate ringboard 0.12.2 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate ringboard 0.12.2
[INFO] finished tweaking crates.io crate ringboard 0.12.2
[INFO] tweaked toml for crates.io crate ringboard 0.12.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ringboard 0.12.2 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ringboard 0.12.2 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v2.0.15
[INFO] [stderr]   Downloaded bitflags v2.9.2
[INFO] [stderr]   Downloaded rand_xoshiro v0.7.0
[INFO] [stderr]   Downloaded libredox v0.1.9
[INFO] [stderr]   Downloaded thiserror v2.0.15
[INFO] [stderr]   Downloaded ask-cli v0.3.0
[INFO] [stderr]   Downloaded clipboard-history-core v0.12.2
[INFO] [stderr]   Downloaded clipboard-history-client-sdk v0.12.2
[INFO] [stderr]   Downloaded darling v0.21.2
[INFO] [stderr]   Downloaded bon v3.7.1
[INFO] [stderr]   Downloaded error-stack v0.5.0
[INFO] [stderr]   Downloaded bon-macros v3.7.1
[INFO] [stderr]   Downloaded darling_core v0.21.2
[INFO] [stderr]   Downloaded rand_distr v0.5.1
[INFO] [stderr]   Downloaded quick-xml v0.38.2
[INFO] [stderr]   Downloaded smallvec v2.0.0-alpha.11
[INFO] [stderr]   Downloaded supercilex-tests v0.4.21
[INFO] [stderr]   Downloaded base64-serde v0.8.0
[INFO] [stderr]   Downloaded clap-num v1.2.0
[INFO] [stderr]   Downloaded darling_macro v0.21.2
[INFO] [stderr]   Downloaded fuc_engine v3.1.1
[INFO] [stderr]   Downloaded expect-test v1.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4821f8268e00d53c1e97ff219858558e9d264ab3c2c2eca6e4d75a2ce9bdca38
[INFO] running `Command { std: "docker" "start" "-a" "4821f8268e00d53c1e97ff219858558e9d264ab3c2c2eca6e4d75a2ce9bdca38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4821f8268e00d53c1e97ff219858558e9d264ab3c2c2eca6e4d75a2ce9bdca38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4821f8268e00d53c1e97ff219858558e9d264ab3c2c2eca6e4d75a2ce9bdca38", kill_on_drop: false }`
[INFO] [stdout] 4821f8268e00d53c1e97ff219858558e9d264ab3c2c2eca6e4d75a2ce9bdca38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec6744a823824617315acc44b155b4ffd63a14dff0e385247ff7698b4b7d2bc6
[INFO] running `Command { std: "docker" "start" "-a" "ec6744a823824617315acc44b155b4ffd63a14dff0e385247ff7698b4b7d2bc6", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v1.0.8
[INFO] [stderr]    Compiling bitflags v2.9.2
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling thiserror v2.0.15
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling libm v0.2.15
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling dirs-sys v0.5.0
[INFO] [stderr]    Compiling unicase v2.8.1
[INFO] [stderr]    Compiling smallvec v2.0.0-alpha.11
[INFO] [stderr]    Compiling toml_writer v1.0.2
[INFO] [stderr]    Compiling base64-serde v0.8.0
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling rand_xoshiro v0.7.0
[INFO] [stderr]    Compiling ask-cli v0.3.0
[INFO] [stderr]    Compiling dirs v6.0.0
[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/ask-cli-0.3.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(read_buf)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/ask-cli-0.3.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_io_borrowed_buf)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling error-stack v0.5.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ask-cli` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ec6744a823824617315acc44b155b4ffd63a14dff0e385247ff7698b4b7d2bc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec6744a823824617315acc44b155b4ffd63a14dff0e385247ff7698b4b7d2bc6", kill_on_drop: false }`
[INFO] [stdout] ec6744a823824617315acc44b155b4ffd63a14dff0e385247ff7698b4b7d2bc6