[INFO] fetching crate distinct 0.1.1...
[INFO] testing distinct-0.1.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate distinct 0.1.1 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate distinct 0.1.1
[INFO] finished tweaking crates.io crate distinct 0.1.1
[INFO] tweaked toml for crates.io crate distinct 0.1.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate distinct 0.1.1 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] 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-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] 2868493b42d6839e42d525169ce1e8cb33163ebc8e4da289167e957691f11fcf
[INFO] running `Command { std: "docker" "start" "-a" "2868493b42d6839e42d525169ce1e8cb33163ebc8e4da289167e957691f11fcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2868493b42d6839e42d525169ce1e8cb33163ebc8e4da289167e957691f11fcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2868493b42d6839e42d525169ce1e8cb33163ebc8e4da289167e957691f11fcf", kill_on_drop: false }`
[INFO] [stdout] 2868493b42d6839e42d525169ce1e8cb33163ebc8e4da289167e957691f11fcf
[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] 22140d5bc8107d11cf78e30db0e8ef362b3b8cc1fc3d599629e72e9b95cd6e97
[INFO] running `Command { std: "docker" "start" "-a" "22140d5bc8107d11cf78e30db0e8ef362b3b8cc1fc3d599629e72e9b95cd6e97", kill_on_drop: false }`
[INFO] [stderr]    Compiling distinct v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![feature(negative_impls)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0366]: `!Sync` impls cannot be specialized
[INFO] [stdout]   --> src/lib.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl<T> !Sync for PairOfPhantoms<T, T> {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `T` is mentioned multiple times
[INFO] [stdout] note: use the same sequence of generic lifetime, type and const parameters as the struct definition
[INFO] [stdout]   --> src/lib.rs:27:1
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct PairOfPhantoms<T, U> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0366, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0366`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `distinct` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "22140d5bc8107d11cf78e30db0e8ef362b3b8cc1fc3d599629e72e9b95cd6e97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22140d5bc8107d11cf78e30db0e8ef362b3b8cc1fc3d599629e72e9b95cd6e97", kill_on_drop: false }`
[INFO] [stdout] 22140d5bc8107d11cf78e30db0e8ef362b3b8cc1fc3d599629e72e9b95cd6e97