[INFO] fetching crate cova 0.2.2...
[INFO] checking cova-0.2.2 against 1.95.0 for pr-155915
[INFO] extracting crate cova 0.2.2 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate cova 0.2.2
[INFO] finished tweaking crates.io crate cova 0.2.2
[INFO] tweaked toml for crates.io crate cova 0.2.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate cova 0.2.2 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 cova 0.2.2 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" "+1.95.0" "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]  Downloading crates ...
[INFO] [stderr]   Downloaded darling_macro v0.14.4
[INFO] [stderr]   Downloaded ident_case v1.0.1
[INFO] [stderr]   Downloaded web-time v0.2.4
[INFO] [stderr]   Downloaded derive_builder_macro v0.11.2
[INFO] [stderr]   Downloaded cova-solver v0.1.2
[INFO] [stderr]   Downloaded strsim v0.10.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.113
[INFO] [stderr]   Downloaded serde-big-array v0.5.1
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.113
[INFO] [stderr]   Downloaded cova-algebra v0.2.2
[INFO] [stderr]   Downloaded derive_builder_core v0.11.2
[INFO] [stderr]   Downloaded bitflags v2.11.0
[INFO] [stderr]   Downloaded amd v0.2.2
[INFO] [stderr]   Downloaded darling_core v0.14.4
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.113
[INFO] [stderr]   Downloaded js-sys v0.3.90
[INFO] [stderr]   Downloaded semver v1.0.27
[INFO] [stderr]   Downloaded itertools v0.11.0
[INFO] [stderr]   Downloaded itertools v0.14.0
[INFO] [stderr]   Downloaded cova-space v0.2.3
[INFO] [stderr]   Downloaded darling v0.14.4
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.113
[INFO] [stderr]   Downloaded bytemuck v1.25.0
[INFO] [stderr]   Downloaded getrandom v0.4.1
[INFO] [stderr]   Downloaded clarabel v0.11.1
[INFO] [stderr]   Downloaded tempfile v3.26.0
[INFO] [stderr]   Downloaded derive_builder v0.11.2
[INFO] [stderr]   Downloaded enum_dispatch v0.3.13
[INFO] [stderr]   Downloaded libc v0.2.182
[INFO] [stderr]   Downloaded glam v0.30.10
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7dae9562b6c0d8296c1027168bf359391067fe5e8a541639e5fa23062e89e2d
[INFO] running `Command { std: "docker" "start" "-a" "b7dae9562b6c0d8296c1027168bf359391067fe5e8a541639e5fa23062e89e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7dae9562b6c0d8296c1027168bf359391067fe5e8a541639e5fa23062e89e2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7dae9562b6c0d8296c1027168bf359391067fe5e8a541639e5fa23062e89e2d", kill_on_drop: false }`
[INFO] [stdout] b7dae9562b6c0d8296c1027168bf359391067fe5e8a541639e5fa23062e89e2d
[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=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] efaf17105fac409f4e5e7c6ec8378af85ff324616bddb08e1ccacceb29092475
[INFO] running `Command { std: "docker" "start" "-a" "efaf17105fac409f4e5e7c6ec8378af85ff324616bddb08e1ccacceb29092475", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.44
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]     Checking bytemuck v1.25.0
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]     Checking safe_arch v0.7.4
[INFO] [stderr]    Compiling zmij v1.0.21
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]     Checking wide v0.7.33
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]     Checking itoa v1.0.17
[INFO] [stderr]    Compiling clarabel v0.11.1
[INFO] [stderr]    Compiling libc v0.2.182
[INFO] [stderr]     Checking memchr v2.8.0
[INFO] [stderr]     Checking itertools v0.11.0
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking amd v0.2.2
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]    Compiling getrandom v0.4.1
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]     Checking itertools v0.14.0
[INFO] [stderr]     Checking simba v0.9.1
[INFO] [stderr]     Checking bitflags v2.11.0
[INFO] [stderr]     Checking linux-raw-sys v0.12.1
[INFO] [stderr]     Checking fastrand v2.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling enum_dispatch v0.3.13
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]     Checking tempfile v3.26.0
[INFO] [stderr]    Compiling darling_core v0.14.4
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]    Compiling darling v0.14.4
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]     Checking nalgebra v0.34.1
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]     Checking serde-big-array v0.5.1
[INFO] [stderr]     Checking cova-algebra v0.2.2
[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/cova-algebra-0.2.2/src/lib.rs:43:1
[INFO] [stdout]    |
[INFO] [stdout] 43 | #![feature(generic_const_exprs)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cova-algebra` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "efaf17105fac409f4e5e7c6ec8378af85ff324616bddb08e1ccacceb29092475", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efaf17105fac409f4e5e7c6ec8378af85ff324616bddb08e1ccacceb29092475", kill_on_drop: false }`
[INFO] [stdout] efaf17105fac409f4e5e7c6ec8378af85ff324616bddb08e1ccacceb29092475