[INFO] fetching crate imm_gc 0.2.1...
[INFO] testing imm_gc-0.2.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate imm_gc 0.2.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate imm_gc 0.2.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate imm_gc 0.2.1
[INFO] finished tweaking crates.io crate imm_gc 0.2.1
[INFO] tweaked toml for crates.io crate imm_gc 0.2.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded imm_gc_derive v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6f7c9d33fa900ee2e766d25f5fb8a5a3278ce0ced3b46b6dff0dcdd7e389fd4e
[INFO] running `Command { std: "docker" "start" "-a" "6f7c9d33fa900ee2e766d25f5fb8a5a3278ce0ced3b46b6dff0dcdd7e389fd4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f7c9d33fa900ee2e766d25f5fb8a5a3278ce0ced3b46b6dff0dcdd7e389fd4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f7c9d33fa900ee2e766d25f5fb8a5a3278ce0ced3b46b6dff0dcdd7e389fd4e", kill_on_drop: false }`
[INFO] [stdout] 6f7c9d33fa900ee2e766d25f5fb8a5a3278ce0ced3b46b6dff0dcdd7e389fd4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9394ed4afa0863e42476167a9070da276b35b6e257d01a4d2938efd314c3a698
[INFO] running `Command { std: "docker" "start" "-a" "9394ed4afa0863e42476167a9070da276b35b6e257d01a4d2938efd314c3a698", kill_on_drop: false }`
[INFO] [stderr]    Compiling imm_gc v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: `box_syntax` has been removed
[INFO] [stdout]    --> src/lib.rs:101:23
[INFO] [stdout]     |
[INFO] [stdout] 101 |               Box::leak(box GcInner {
[INFO] [stdout]     |  _______________________^
[INFO] [stdout] 102 | |                 ref_count: Cell::new(1),
[INFO] [stdout] 103 | |                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 104 | |                 done: Cell::new(false),
[INFO] [stdout] 105 | |                 dropped: Cell::new(false),
[INFO] [stdout] 106 | |                 value: MaybeUninit::new(value),
[INFO] [stdout] 107 | |             })
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout] help: use `Box::new()` instead
[INFO] [stdout]     |
[INFO] [stdout] 101 ~             Box::leak(Box::new(GcInner {
[INFO] [stdout] 102 +                 ref_count: Cell::new(1),
[INFO] [stdout] 103 +                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 104 +                 done: Cell::new(false),
[INFO] [stdout] 105 +                 dropped: Cell::new(false),
[INFO] [stdout] 106 +                 value: MaybeUninit::new(value),
[INFO] [stdout] 107 ~             }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_syntax` has been removed
[INFO] [stdout]    --> src/lib.rs:154:23
[INFO] [stdout]     |
[INFO] [stdout] 154 |               Box::leak(box GcInner {
[INFO] [stdout]     |  _______________________^
[INFO] [stdout] 155 | |                 ref_count: Cell::new(1),
[INFO] [stdout] 156 | |                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 157 | |                 done: Cell::new(false),
[INFO] [stdout] 158 | |                 dropped: Cell::new(true),
[INFO] [stdout] 159 | |                 value: MaybeUninit::<T>::uninit(),
[INFO] [stdout] 160 | |             })
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout] help: use `Box::new()` instead
[INFO] [stdout]     |
[INFO] [stdout] 154 ~             Box::leak(Box::new(GcInner {
[INFO] [stdout] 155 +                 ref_count: Cell::new(1),
[INFO] [stdout] 156 +                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 157 +                 done: Cell::new(false),
[INFO] [stdout] 158 +                 dropped: Cell::new(true),
[INFO] [stdout] 159 +                 value: MaybeUninit::<T>::uninit(),
[INFO] [stdout] 160 ~             }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:45
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                                             ^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: replaced with `#[rustc_box]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `std` in the list of imported crates
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 21+ use alloc::boxed::Box;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:57
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                                                         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `maybe_uninit_extra` has been stable since 1.60.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |             Box::leak(box GcInner {
[INFO] [stdout]     |             ^^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `Box`
[INFO] [stdout] ...
[INFO] [stdout] 108 |             .into(),
[INFO] [stdout]     |              ---- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 101 |             Box::<T, A>::leak(box GcInner {
[INFO] [stdout]     |                ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:154:13
[INFO] [stdout]     |
[INFO] [stdout] 154 |             Box::leak(box GcInner {
[INFO] [stdout]     |             ^^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `Box`
[INFO] [stdout] ...
[INFO] [stdout] 161 |             .into(),
[INFO] [stdout]     |              ---- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 154 |             Box::<T, A>::leak(box GcInner {
[INFO] [stdout]     |                ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 9 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0433, E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `imm_gc` (lib) due to 10 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "9394ed4afa0863e42476167a9070da276b35b6e257d01a4d2938efd314c3a698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9394ed4afa0863e42476167a9070da276b35b6e257d01a4d2938efd314c3a698", kill_on_drop: false }`
[INFO] [stdout] 9394ed4afa0863e42476167a9070da276b35b6e257d01a4d2938efd314c3a698
[INFO] testing imm_gc-0.2.1 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate imm_gc 0.2.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate imm_gc 0.2.1 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate imm_gc 0.2.1
[INFO] finished tweaking crates.io crate imm_gc 0.2.1
[INFO] tweaked toml for crates.io crate imm_gc 0.2.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b0a78ccd1d3c229bfbc6167d7853bdaa6cf82ddece6ae18b0591c70c09beea5
[INFO] running `Command { std: "docker" "start" "-a" "4b0a78ccd1d3c229bfbc6167d7853bdaa6cf82ddece6ae18b0591c70c09beea5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b0a78ccd1d3c229bfbc6167d7853bdaa6cf82ddece6ae18b0591c70c09beea5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b0a78ccd1d3c229bfbc6167d7853bdaa6cf82ddece6ae18b0591c70c09beea5", kill_on_drop: false }`
[INFO] [stdout] 4b0a78ccd1d3c229bfbc6167d7853bdaa6cf82ddece6ae18b0591c70c09beea5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 616b0a13cb73fbaab28130e4c75759895e730bc6de049eb92e8de21ee96fa9b7
[INFO] running `Command { std: "docker" "start" "-a" "616b0a13cb73fbaab28130e4c75759895e730bc6de049eb92e8de21ee96fa9b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling imm_gc v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: `box_syntax` has been removed
[INFO] [stdout]    --> src/lib.rs:101:23
[INFO] [stdout]     |
[INFO] [stdout] 101 |               Box::leak(box GcInner {
[INFO] [stdout]     |  _______________________^
[INFO] [stdout] 102 | |                 ref_count: Cell::new(1),
[INFO] [stdout] 103 | |                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 104 | |                 done: Cell::new(false),
[INFO] [stdout] 105 | |                 dropped: Cell::new(false),
[INFO] [stdout] 106 | |                 value: MaybeUninit::new(value),
[INFO] [stdout] 107 | |             })
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout] help: use `Box::new()` instead
[INFO] [stdout]     |
[INFO] [stdout] 101 ~             Box::leak(Box::new(GcInner {
[INFO] [stdout] 102 +                 ref_count: Cell::new(1),
[INFO] [stdout] 103 +                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 104 +                 done: Cell::new(false),
[INFO] [stdout] 105 +                 dropped: Cell::new(false),
[INFO] [stdout] 106 +                 value: MaybeUninit::new(value),
[INFO] [stdout] 107 ~             }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `box_syntax` has been removed
[INFO] [stdout]    --> src/lib.rs:154:23
[INFO] [stdout]     |
[INFO] [stdout] 154 |               Box::leak(box GcInner {
[INFO] [stdout]     |  _______________________^
[INFO] [stdout] 155 | |                 ref_count: Cell::new(1),
[INFO] [stdout] 156 | |                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 157 | |                 done: Cell::new(false),
[INFO] [stdout] 158 | |                 dropped: Cell::new(true),
[INFO] [stdout] 159 | |                 value: MaybeUninit::<T>::uninit(),
[INFO] [stdout] 160 | |             })
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout] help: use `Box::new()` instead
[INFO] [stdout]     |
[INFO] [stdout] 154 ~             Box::leak(Box::new(GcInner {
[INFO] [stdout] 155 +                 ref_count: Cell::new(1),
[INFO] [stdout] 156 +                 internal_ref_count: Cell::new(0),
[INFO] [stdout] 157 +                 done: Cell::new(false),
[INFO] [stdout] 158 +                 dropped: Cell::new(true),
[INFO] [stdout] 159 +                 value: MaybeUninit::<T>::uninit(),
[INFO] [stdout] 160 ~             }))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:45
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                                             ^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: replaced with `#[rustc_box]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `std` in the list of imported crates
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 21+ use alloc::boxed::Box;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:57
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                                                         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `maybe_uninit_extra` has been stable since 1.60.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update, maybe_uninit_extra, box_syntax, allocator_api)]
[INFO] [stdout]   |                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |             Box::leak(box GcInner {
[INFO] [stdout]     |             ^^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `Box`
[INFO] [stdout] ...
[INFO] [stdout] 108 |             .into(),
[INFO] [stdout]     |              ---- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 101 |             Box::<T, A>::leak(box GcInner {
[INFO] [stdout]     |                ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:154:13
[INFO] [stdout]     |
[INFO] [stdout] 154 |             Box::leak(box GcInner {
[INFO] [stdout]     |             ^^^^^^^^^ cannot infer type of the type parameter `T` declared on the struct `Box`
[INFO] [stdout] ...
[INFO] [stdout] 161 |             .into(),
[INFO] [stdout]     |              ---- type must be known at this point
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 154 |             Box::<T, A>::leak(box GcInner {
[INFO] [stdout]     |                ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 9 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0433, E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `imm_gc` (lib) due to 10 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "616b0a13cb73fbaab28130e4c75759895e730bc6de049eb92e8de21ee96fa9b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "616b0a13cb73fbaab28130e4c75759895e730bc6de049eb92e8de21ee96fa9b7", kill_on_drop: false }`
[INFO] [stdout] 616b0a13cb73fbaab28130e4c75759895e730bc6de049eb92e8de21ee96fa9b7
