[INFO] fetching crate currying 0.4.0...
[INFO] checking currying-0.4.0 against try#ddcf048784667508cd676fef4667f88ae15628a3 for pr-148271
[INFO] extracting crate currying 0.4.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate currying 0.4.0
[INFO] finished tweaking crates.io crate currying 0.4.0
[INFO] tweaked toml for crates.io crate currying 0.4.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate currying 0.4.0 on toolchain ddcf048784667508cd676fef4667f88ae15628a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate currying 0.4.0 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" "+ddcf048784667508cd676fef4667f88ae15628a3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43864f19ff614516499a80c94ce74c88ce70d4e6bf83f16278a355301ac7dd21
[INFO] running `Command { std: "docker" "start" "-a" "43864f19ff614516499a80c94ce74c88ce70d4e6bf83f16278a355301ac7dd21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43864f19ff614516499a80c94ce74c88ce70d4e6bf83f16278a355301ac7dd21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43864f19ff614516499a80c94ce74c88ce70d4e6bf83f16278a355301ac7dd21", kill_on_drop: false }`
[INFO] [stdout] 43864f19ff614516499a80c94ce74c88ce70d4e6bf83f16278a355301ac7dd21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13303155d9d2a349484b131d29be1e0f56bca3d01efe22caa8c93ca615cf1bd3
[INFO] running `Command { std: "docker" "start" "-a" "13303155d9d2a349484b131d29be1e0f56bca3d01efe22caa8c93ca615cf1bd3", kill_on_drop: false }`
[INFO] [stderr]    Compiling tupleops-generator v0.1.0
[INFO] [stderr]     Checking moddef v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling tupleops-macros v0.1.0
[INFO] [stderr]     Checking tupleops v0.1.1
[INFO] [stderr]     Checking currying v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnMut`
[INFO] [stdout]    --> src/lib.rs:114:21
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let mut f = |j| {
[INFO] [stdout]     |                     ^^^ this closure implements `FnMut`, not `Fn`
[INFO] [stdout] 115 |             i += j;
[INFO] [stdout]     |             - closure is `FnMut` because it mutates the variable `i` here
[INFO] [stdout] ...
[INFO] [stdout] 123 |             assert_eq!(fj(), i0 + k * n)
[INFO] [stdout]     |                        ---- the requirement to implement `Fn` derives from here
[INFO] [stdout]     |
[INFO] [stdout]     = note: required for `&mut {closure@src/lib.rs:114:21: 114:24}` to implement `Fn(i32)`
[INFO] [stdout]     = note: 1 redundant requirement hidden
[INFO] [stdout]     = note: required for `curried::Curried<(i32,), (), &mut {closure@src/lib.rs:114:21: 114:24}>` to implement `Fn()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0525`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `currying` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "13303155d9d2a349484b131d29be1e0f56bca3d01efe22caa8c93ca615cf1bd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13303155d9d2a349484b131d29be1e0f56bca3d01efe22caa8c93ca615cf1bd3", kill_on_drop: false }`
[INFO] [stdout] 13303155d9d2a349484b131d29be1e0f56bca3d01efe22caa8c93ca615cf1bd3