[INFO] fetching crate ranged_integers 0.10.1...
[INFO] testing ranged_integers-0.10.1 against 1.91.0 for beta-1.92-2
[INFO] extracting crate ranged_integers 0.10.1 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate ranged_integers 0.10.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ranged_integers 0.10.1
[INFO] tweaked toml for crates.io crate ranged_integers 0.10.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ranged_integers 0.10.1 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ranged_integers 0.10.1 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad11fe3d683358bd61e279ab8b0e3772909427bda4c69778fbf2e6bf1ef5c36c
[INFO] running `Command { std: "docker" "start" "-a" "ad11fe3d683358bd61e279ab8b0e3772909427bda4c69778fbf2e6bf1ef5c36c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad11fe3d683358bd61e279ab8b0e3772909427bda4c69778fbf2e6bf1ef5c36c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad11fe3d683358bd61e279ab8b0e3772909427bda4c69778fbf2e6bf1ef5c36c", kill_on_drop: false }`
[INFO] [stdout] ad11fe3d683358bd61e279ab8b0e3772909427bda4c69778fbf2e6bf1ef5c36c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ea389a63e95f2a3a9c5660a27a946aa5b24f54345dca8ea6b5b84e258e39c56
[INFO] running `Command { std: "docker" "start" "-a" "0ea389a63e95f2a3a9c5660a27a946aa5b24f54345dca8ea6b5b84e258e39c56", kill_on_drop: false }`
[INFO] [stderr]    Compiling ranged_integers v0.10.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:389:1
[INFO] [stdout]     |
[INFO] [stdout] 389 | #![feature(generic_const_exprs)]  // The whole idea is based on this
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:390:1
[INFO] [stdout]     |
[INFO] [stdout] 390 | #![feature(adt_const_params)]  // This is mostly for OperationPossibility
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:391:1
[INFO] [stdout]     |
[INFO] [stdout] 391 | #![feature(specialization)]  // It allows to decrease a number of constraints in Ranged
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:392:1
[INFO] [stdout]     |
[INFO] [stdout] 392 | #![feature(freeze)]  // If it is enabled in user crate, the Ranged should implement Freeze trait
[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 `ranged_integers` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "0ea389a63e95f2a3a9c5660a27a946aa5b24f54345dca8ea6b5b84e258e39c56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ea389a63e95f2a3a9c5660a27a946aa5b24f54345dca8ea6b5b84e258e39c56", kill_on_drop: false }`
[INFO] [stdout] 0ea389a63e95f2a3a9c5660a27a946aa5b24f54345dca8ea6b5b84e258e39c56