[INFO] fetching crate fasteval 0.2.4...
[INFO] checking fasteval-0.2.4 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate fasteval 0.2.4 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate fasteval 0.2.4
[INFO] finished tweaking crates.io crate fasteval 0.2.4
[INFO] tweaked toml for crates.io crate fasteval 0.2.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fasteval 0.2.4 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fasteval 0.2.4 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee6059a42c2296551051fc29d51723faeae645968701a564932a5cdca4c75709
[INFO] running `Command { std: "docker" "start" "-a" "ee6059a42c2296551051fc29d51723faeae645968701a564932a5cdca4c75709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee6059a42c2296551051fc29d51723faeae645968701a564932a5cdca4c75709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee6059a42c2296551051fc29d51723faeae645968701a564932a5cdca4c75709", kill_on_drop: false }`
[INFO] [stdout] ee6059a42c2296551051fc29d51723faeae645968701a564932a5cdca4c75709
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7304e5c0185e4fe174d8c2652859b74a56e4ff8343f33b1e604fe03406f8e0f
[INFO] running `Command { std: "docker" "start" "-a" "d7304e5c0185e4fe174d8c2652859b74a56e4ff8343f33b1e604fe03406f8e0f", kill_on_drop: false }`
[INFO] [stderr]     Checking fasteval v0.2.4 (/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/evaler.rs:421:67
[INFO] [stdout]     |
[INFO] [stdout] 421 |             EVar(name) => eval_var!(ns, name, Vec::new(), unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) }),
[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/evaler.rs:427:51
[INFO] [stdout]     |
[INFO] [stdout] 427 |                 eval_var!(ns, name, args, unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) })
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[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/evaler.rs:587:67
[INFO] [stdout]     |
[INFO] [stdout] 587 |             IVar(name) => eval_var!(ns, name, Vec::new(), unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) }),
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[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/evaler.rs:593:51
[INFO] [stdout]     |
[INFO] [stdout] 593 |                 eval_var!(ns, name, args, unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) })
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fasteval` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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/evaler.rs:421:67
[INFO] [stdout]     |
[INFO] [stdout] 421 |             EVar(name) => eval_var!(ns, name, Vec::new(), unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) }),
[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/evaler.rs:427:51
[INFO] [stdout]     |
[INFO] [stdout] 427 |                 eval_var!(ns, name, args, unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) })
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[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/evaler.rs:587:67
[INFO] [stdout]     |
[INFO] [stdout] 587 |             IVar(name) => eval_var!(ns, name, Vec::new(), unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) }),
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[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/evaler.rs:593:51
[INFO] [stdout]     |
[INFO] [stdout] 593 |                 eval_var!(ns, name, args, unsafe{ &mut *(&slab.ps.char_buf as *const _ as *mut _) })
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fasteval` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "d7304e5c0185e4fe174d8c2652859b74a56e4ff8343f33b1e604fe03406f8e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7304e5c0185e4fe174d8c2652859b74a56e4ff8343f33b1e604fe03406f8e0f", kill_on_drop: false }`
[INFO] [stdout] d7304e5c0185e4fe174d8c2652859b74a56e4ff8343f33b1e604fe03406f8e0f