[INFO] cloning repository https://github.com/ferrum-lang/ferrum_runtime
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ferrum-lang/ferrum_runtime" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fferrum-lang%2Fferrum_runtime", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fferrum-lang%2Fferrum_runtime'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef618aaef232db1f131a162fced3cb76a126173b
[INFO] checking ferrum-lang/ferrum_runtime against master#40daf23eeb711dadf140b2536e67e3ff4c999196 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fferrum-lang%2Fferrum_runtime" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ferrum-lang/ferrum_runtime on toolchain 40daf23eeb711dadf140b2536e67e3ff4c999196
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ferrum-lang/ferrum_runtime
[INFO] finished tweaking git repo https://github.com/ferrum-lang/ferrum_runtime
[INFO] tweaked toml for git repo https://github.com/ferrum-lang/ferrum_runtime written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ferrum-lang/ferrum_runtime 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" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd32e05d2b5188d3ffbb956ca1ffb014435ce5b5e4ebc55a3ca1fe1fd7d34240
[INFO] running `Command { std: "docker" "start" "-a" "cd32e05d2b5188d3ffbb956ca1ffb014435ce5b5e4ebc55a3ca1fe1fd7d34240", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd32e05d2b5188d3ffbb956ca1ffb014435ce5b5e4ebc55a3ca1fe1fd7d34240", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd32e05d2b5188d3ffbb956ca1ffb014435ce5b5e4ebc55a3ca1fe1fd7d34240", kill_on_drop: false }`
[INFO] [stdout] cd32e05d2b5188d3ffbb956ca1ffb014435ce5b5e4ebc55a3ca1fe1fd7d34240
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b784cb6407f6a8995afde2b98cadeb5365b15f15bdec5d9562e2c20123a72263
[INFO] running `Command { std: "docker" "start" "-a" "b784cb6407f6a8995afde2b98cadeb5365b15f15bdec5d9562e2c20123a72263", kill_on_drop: false }`
[INFO] [stderr]     Checking ferrum_runtime v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
[INFO] [stdout]  --> src/utils/mem.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut_ptr = const_ptr as *mut T;
[INFO] [stdout]   |                   ------------------- casting happened here
[INFO] [stdout] 6 |     ptr::write(&mut *mut_ptr, value);
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]   = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
[INFO] [stdout]  --> src/utils/mem.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut_ptr = const_ptr as *mut T;
[INFO] [stdout]   |                   ------------------- casting happened here
[INFO] [stdout] 6 |     ptr::write(&mut *mut_ptr, value);
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]   = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ferrum_runtime` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `ferrum_runtime` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "b784cb6407f6a8995afde2b98cadeb5365b15f15bdec5d9562e2c20123a72263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b784cb6407f6a8995afde2b98cadeb5365b15f15bdec5d9562e2c20123a72263", kill_on_drop: false }`
[INFO] [stdout] b784cb6407f6a8995afde2b98cadeb5365b15f15bdec5d9562e2c20123a72263