[INFO] fetching crate eko-gc 0.0.2...
[INFO] checking eko-gc-0.0.2 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate eko-gc 0.0.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate eko-gc 0.0.2 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate eko-gc 0.0.2
[INFO] finished tweaking crates.io crate eko-gc 0.0.2
[INFO] tweaked toml for crates.io crate eko-gc 0.0.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09ea3bd63561634432e072f9c377f907f791f8fc037bc88059e19eaa5ef38b50
[INFO] running `Command { std: "docker" "start" "-a" "09ea3bd63561634432e072f9c377f907f791f8fc037bc88059e19eaa5ef38b50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09ea3bd63561634432e072f9c377f907f791f8fc037bc88059e19eaa5ef38b50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09ea3bd63561634432e072f9c377f907f791f8fc037bc88059e19eaa5ef38b50", kill_on_drop: false }`
[INFO] [stdout] 09ea3bd63561634432e072f9c377f907f791f8fc037bc88059e19eaa5ef38b50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d417c4d64a7d3826f16e0aeae0f2317ffdda29b0b6820a3ee3df6388d548713
[INFO] running `Command { std: "docker" "start" "-a" "3d417c4d64a7d3826f16e0aeae0f2317ffdda29b0b6820a3ee3df6388d548713", kill_on_drop: false }`
[INFO] [stderr]     Checking eko-gc v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:42:47
[INFO] [stdout]    |
[INFO] [stdout] 42 |   pub(crate) boxes: Option<NonNull<GcBox<'gc, Trace>>>,
[INFO] [stdout]    |                                               ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:74:28
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let gc_box: &GcBox<Trace> = unsafe { gc_box_ptr.as_ref() };
[INFO] [stdout]    |                            ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:82:38
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut unmarked: Vec<*mut GcBox<Trace>> = Vec::new();
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_box.rs:22:46
[INFO] [stdout]    |
[INFO] [stdout] 22 |   pub(crate) next: Option<NonNull<GcBox<'gc, Trace>>>,
[INFO] [stdout]    |                                              ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:42:47
[INFO] [stdout]    |
[INFO] [stdout] 42 |   pub(crate) boxes: Option<NonNull<GcBox<'gc, Trace>>>,
[INFO] [stdout]    |                                               ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:74:28
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let gc_box: &GcBox<Trace> = unsafe { gc_box_ptr.as_ref() };
[INFO] [stdout]    |                            ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:82:38
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut unmarked: Vec<*mut GcBox<Trace>> = Vec::new();
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_box.rs:22:46
[INFO] [stdout]    |
[INFO] [stdout] 22 |   pub(crate) next: Option<NonNull<GcBox<'gc, Trace>>>,
[INFO] [stdout]    |                                              ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "3d417c4d64a7d3826f16e0aeae0f2317ffdda29b0b6820a3ee3df6388d548713", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d417c4d64a7d3826f16e0aeae0f2317ffdda29b0b6820a3ee3df6388d548713", kill_on_drop: false }`
[INFO] [stdout] 3d417c4d64a7d3826f16e0aeae0f2317ffdda29b0b6820a3ee3df6388d548713