[INFO] updating cached repository https://github.com/GrossBetruger/ArithMaster
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 30a9b9069a41463ce99179d73f939d44137770fd
[INFO] checking GrossBetruger/ArithMaster against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FGrossBetruger%2FArithMaster" "work/builds/worker-1/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GrossBetruger/ArithMaster on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/GrossBetruger/ArithMaster
[INFO] finished tweaking git repo https://github.com/GrossBetruger/ArithMaster
[INFO] tweaked toml for git repo https://github.com/GrossBetruger/ArithMaster written to work/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/GrossBetruger/ArithMaster already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d1ff7eb239b538413a62d05a9f3af97284f28710f82b2d3444853395b7ec7afe
[INFO] running `"docker" "start" "-a" "d1ff7eb239b538413a62d05a9f3af97284f28710f82b2d3444853395b7ec7afe"`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking rand v0.6.1
[INFO] [stderr]     Checking arithmaster v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:178:16
[INFO] [stderr]     |
[INFO] [stderr] 178 |     exercise: &Fn(i32, i32) -> (i32, i32, f32),
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> (i32, i32, f32)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:424:20
[INFO] [stderr]     |
[INFO] [stderr] 424 |         exercise: &Fn(i32, i32) -> (i32, i32, f32),
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> (i32, i32, f32)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:178:16
[INFO] [stderr]     |
[INFO] [stderr] 178 |     exercise: &Fn(i32, i32) -> (i32, i32, f32),
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32, i32) -> (i32, i32, f32)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.00s
[INFO] running `"docker" "inspect" "d1ff7eb239b538413a62d05a9f3af97284f28710f82b2d3444853395b7ec7afe"`
[INFO] running `"docker" "rm" "-f" "d1ff7eb239b538413a62d05a9f3af97284f28710f82b2d3444853395b7ec7afe"`
[INFO] [stdout] d1ff7eb239b538413a62d05a9f3af97284f28710f82b2d3444853395b7ec7afe