[INFO] fetching crate easy_ffi 0.1.0...
[INFO] checking easy_ffi-0.1.0 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate easy_ffi 0.1.0 into /workspace/builds/worker-75/source
[INFO] validating manifest of crates.io crate easy_ffi 0.1.0 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate easy_ffi 0.1.0
[INFO] finished tweaking crates.io crate easy_ffi 0.1.0
[INFO] tweaked toml for crates.io crate easy_ffi 0.1.0 written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4370a4a964c59ad68a2cb9a1db8369e1f05f8203114df6d68cbd4568c676727e
[INFO] running `Command { std: "docker" "start" "-a" "4370a4a964c59ad68a2cb9a1db8369e1f05f8203114df6d68cbd4568c676727e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4370a4a964c59ad68a2cb9a1db8369e1f05f8203114df6d68cbd4568c676727e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4370a4a964c59ad68a2cb9a1db8369e1f05f8203114df6d68cbd4568c676727e", kill_on_drop: false }`
[INFO] [stdout] 4370a4a964c59ad68a2cb9a1db8369e1f05f8203114df6d68cbd4568c676727e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 205264c8b48530f58264f55e084d4857ea983037809dc80c24c28d1b481c2b4d
[INFO] running `Command { std: "docker" "start" "-a" "205264c8b48530f58264f55e084d4857ea983037809dc80c24c28d1b481c2b4d", kill_on_drop: false }`
[INFO] [stderr]     Checking easy_ffi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lint `private_no_mangle_fns` has been removed: no longer a warning, `#[no_mangle]` functions always exported
[INFO] [stdout]    --> src/lib.rs:144:14
[INFO] [stdout]     |
[INFO] [stdout] 144 |     #![allow(private_no_mangle_fns)]
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lint `private_no_mangle_fns` has been removed: no longer a warning, `#[no_mangle]` functions always exported
[INFO] [stdout]    --> src/lib.rs:144:14
[INFO] [stdout]     |
[INFO] [stdout] 144 |     #![allow(private_no_mangle_fns)]
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:127:90
[INFO] [stdout]     |
[INFO] [stdout] 127 |                           ::std::result::Result<$ok_ty, ::std::result::Result<$err_ty, Box<::std::any::Any + Send + 'static>>> =
[INFO] [stdout]     |                                                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn ::std::any::Any + Send + 'static`
[INFO] [stdout] ...
[INFO] [stdout] 160 | /     my_ffi_fn! (
[INFO] [stdout] 161 | |         /// Foo: do stuff
[INFO] [stdout] 162 | |         fn foo(i: i32) -> Result<i32, &'static str> {
[INFO] [stdout] 163 | |             match i {
[INFO] [stdout] ...   |
[INFO] [stdout] 168 | |         }
[INFO] [stdout] 169 | |     );
[INFO] [stdout]     | |______- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: this warning originates in the macro `my_ffi_fn` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "205264c8b48530f58264f55e084d4857ea983037809dc80c24c28d1b481c2b4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "205264c8b48530f58264f55e084d4857ea983037809dc80c24c28d1b481c2b4d", kill_on_drop: false }`
[INFO] [stdout] 205264c8b48530f58264f55e084d4857ea983037809dc80c24c28d1b481c2b4d