[INFO] fetching crate r-graph 0.1.5...
[INFO] testing r-graph-0.1.5 against 1.90.0 for beta-1.91-3
[INFO] extracting crate r-graph 0.1.5 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate r-graph 0.1.5
[INFO] finished tweaking crates.io crate r-graph 0.1.5
[INFO] tweaked toml for crates.io crate r-graph 0.1.5 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate r-graph 0.1.5 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.8.2 (available: v0.14.0)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.9.2)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6e92fb58d26244a848a8e74b187dbfb6c19310e8ece30111f4663cf30bbff083
[INFO] running `Command { std: "docker" "start" "-a" "6e92fb58d26244a848a8e74b187dbfb6c19310e8ece30111f4663cf30bbff083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e92fb58d26244a848a8e74b187dbfb6c19310e8ece30111f4663cf30bbff083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e92fb58d26244a848a8e74b187dbfb6c19310e8ece30111f4663cf30bbff083", kill_on_drop: false }`
[INFO] [stdout] 6e92fb58d26244a848a8e74b187dbfb6c19310e8ece30111f4663cf30bbff083
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] d95c02ec11c216b64a98a137dc907d2c9ba07d9557586e1bc31011390e7d39c6
[INFO] running `Command { std: "docker" "start" "-a" "d95c02ec11c216b64a98a137dc907d2c9ba07d9557586e1bc31011390e7d39c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling r-graph v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_alias_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: `impl Trait` in associated types is unstable
[INFO] [stdout]    --> src/dev/mod.rs:110:19
[INFO] [stdout]     |
[INFO] [stdout] 110 |     type Output = impl Fn(T) -> R2;
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddEdge` and `Undirected`
[INFO] [stdout]  --> src/extended/clique.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dev::orientation::{AddEdge, Orientation, Undirected};
[INFO] [stdout]   |                               ^^^^^^^               ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddVertex`, `GetVertex`, and `Vertices`
[INFO] [stdout]  --> src/extended/clique.rs:3:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::dev::{AddVertex, GetVertex, Neighbours, Vertices, orientation};
[INFO] [stdout]   |                  ^^^^^^^^^  ^^^^^^^^^              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SubGraph`
[INFO] [stdout]  --> src/extended/clique.rs:5:41
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::wrapper::sub::{intersection, SubGraph};
[INFO] [stdout]   |                                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::dev::transform::transformers::VertexKey`
[INFO] [stdout]   --> src/extended/clique.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::dev::transform::transformers::VertexKey;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Orientation`
[INFO] [stdout]  --> src/wrapper/sub.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dev::orientation::{AddEdge, Orientation};
[INFO] [stdout]   |                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `r-graph` (lib) due to 2 previous errors; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d95c02ec11c216b64a98a137dc907d2c9ba07d9557586e1bc31011390e7d39c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d95c02ec11c216b64a98a137dc907d2c9ba07d9557586e1bc31011390e7d39c6", kill_on_drop: false }`
[INFO] [stdout] d95c02ec11c216b64a98a137dc907d2c9ba07d9557586e1bc31011390e7d39c6