[INFO] fetching crate zerogc-derive 0.2.0-alpha.3...
[INFO] checking zerogc-derive-0.2.0-alpha.3 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate zerogc-derive 0.2.0-alpha.3 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate zerogc-derive 0.2.0-alpha.3 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zerogc-derive 0.2.0-alpha.3
[INFO] finished tweaking crates.io crate zerogc-derive 0.2.0-alpha.3
[INFO] tweaked toml for crates.io crate zerogc-derive 0.2.0-alpha.3 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82509ebd16e14e468c0407cfd5b090342207d9f72b069a11dc1b4395411e72a6
[INFO] running `Command { std: "docker" "start" "-a" "82509ebd16e14e468c0407cfd5b090342207d9f72b069a11dc1b4395411e72a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82509ebd16e14e468c0407cfd5b090342207d9f72b069a11dc1b4395411e72a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82509ebd16e14e468c0407cfd5b090342207d9f72b069a11dc1b4395411e72a6", kill_on_drop: false }`
[INFO] [stdout] 82509ebd16e14e468c0407cfd5b090342207d9f72b069a11dc1b4395411e72a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d3d42c192967e1efb9afbc3437837018d0ae26e074144d762d549080d2909eb
[INFO] running `Command { std: "docker" "start" "-a" "0d3d42c192967e1efb9afbc3437837018d0ae26e074144d762d549080d2909eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking zerogc-derive v0.2.0-alpha.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling zerogc-derive v0.2.0-alpha.4
[INFO] [stderr]     Checking zerogc v0.2.0-alpha.4
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]  --> tests/basic.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Trace)]
[INFO] [stdout]   |          ^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:20:23
[INFO] [stdout]    |
[INFO] [stdout] 20 | #[derive(Copy, Clone, Trace)]
[INFO] [stdout]    |                       ^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:29:23
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[derive(Copy, Clone, Trace)]
[INFO] [stdout]    |                       ^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:58:10
[INFO] [stdout]    |
[INFO] [stdout] 58 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 78 | #[derive(NullTrace)]
[INFO] [stdout]    |          ^^^^^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `NullTrace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:86:10
[INFO] [stdout]    |
[INFO] [stdout] 86 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0438]: const `NEEDS_DROP` is not a member of trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:96:10
[INFO] [stdout]    |
[INFO] [stdout] 96 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ not a member of trait `zerogc::GcSafe`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]  --> tests/basic.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     gc: Gc<'gc, i32, DummyCollectorId>,
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]  --> tests/basic.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 |     rec: Gc<'gc, SpecificCollector<'gc>, DummyCollectorId>
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     parent: Option<Gc<'gc, Basic<'gc, Id>, Id>>,
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:16:15
[INFO] [stdout]    |
[INFO] [stdout] 16 |     children: Vec<Gc<'gc, Basic<'gc, Id>, Id>>,
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     value: String
[INFO] [stdout]    |            ^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:62:10
[INFO] [stdout]    |
[INFO] [stdout] 62 |     val: i32,
[INFO] [stdout]    |          ^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     s: &'static str,
[INFO] [stdout]    |        ^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 |     f: f32
[INFO] [stdout]    |        ^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `GcSafe`
[INFO] [stdout]   --> tests/basic.rs:75:41
[INFO] [stdout]    |
[INFO] [stdout] 75 |     assert!(<Basic<'gc, Id> as GcSafe>::NEEDS_DROP);
[INFO] [stdout]    |                                         ^^^^^^^^^^ not found in `GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     s: String,
[INFO] [stdout]    |        ^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 |     i: i32,
[INFO] [stdout]    |        ^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:83:10
[INFO] [stdout]    |
[INFO] [stdout] 83 |     wow: Box<NopTrace>
[INFO] [stdout]    |          ^^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 |     s: &'static str,
[INFO] [stdout]    |        ^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]   --> tests/basic.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     i: i32,
[INFO] [stdout]    |        ^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]    --> tests/basic.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 |     s: String,
[INFO] [stdout]     |        ^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]    --> tests/basic.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 101 |     i: i32,
[INFO] [stdout]     |        ^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]    --> tests/basic.rs:102:10
[INFO] [stdout]     |
[INFO] [stdout] 102 |     wow: Box<NopTrace>,
[INFO] [stdout]     |          ^^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]    --> tests/basic.rs:103:12
[INFO] [stdout]     |
[INFO] [stdout] 103 |     other: &'a LifetimeTrace<'a, T>,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `zerogc::GcSafe`
[INFO] [stdout]    --> tests/basic.rs:104:14
[INFO] [stdout]     |
[INFO] [stdout] 104 |     generic: Box<T>
[INFO] [stdout]     |              ^^^^^^ not found in `zerogc::GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `GcSafe`
[INFO] [stdout]    --> tests/basic.rs:117:64
[INFO] [stdout]     |
[INFO] [stdout] 117 |     assert!(<Basic::<dummy_impl::DummyCollectorId> as GcSafe>::NEEDS_DROP);
[INFO] [stdout]     |                                                                ^^^^^^^^^^ not found in `GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `GcSafe`
[INFO] [stdout]    --> tests/basic.rs:118:69
[INFO] [stdout]     |
[INFO] [stdout] 118 |     assert!(!<BasicCopy::<dummy_impl::DummyCollectorId> as GcSafe>::NEEDS_DROP);
[INFO] [stdout]     |                                                                     ^^^^^^^^^^ not found in `GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `GcSafe`
[INFO] [stdout]    --> tests/basic.rs:134:46
[INFO] [stdout]     |
[INFO] [stdout] 134 |     assert!(!<UnsafeSkipped<'gc> as GcSafe>::NEEDS_DROP);
[INFO] [stdout]     |                                              ^^^^^^^^^^ not found in `GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0576]: cannot find method or associated constant `NEEDS_DROP` in trait `GcSafe`
[INFO] [stdout]    --> tests/basic.rs:143:49
[INFO] [stdout]     |
[INFO] [stdout] 143 |     assert!(!<NoDestructorNullTrace as GcSafe>::NEEDS_DROP);
[INFO] [stdout]     |                                                 ^^^^^^^^^^ not found in `GcSafe`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]  --> tests/basic.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Trace)]
[INFO] [stdout]   |          ^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]   = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]   = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]   --> tests/basic.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]    = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]    = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]   --> tests/basic.rs:20:23
[INFO] [stdout]    |
[INFO] [stdout] 20 | #[derive(Copy, Clone, Trace)]
[INFO] [stdout]    |                       ^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]    = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]    = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]   --> tests/basic.rs:29:23
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[derive(Copy, Clone, Trace)]
[INFO] [stdout]    |                       ^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]    = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]    = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]   --> tests/basic.rs:58:10
[INFO] [stdout]    |
[INFO] [stdout] 58 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]    = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]    = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]   --> tests/basic.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 78 | #[derive(NullTrace)]
[INFO] [stdout]    |          ^^^^^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `NullTrace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]    = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]    = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]   --> tests/basic.rs:86:10
[INFO] [stdout]    |
[INFO] [stdout] 86 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]    = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]    = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `NEEDS_DROP`, `visit_inside_gc`
[INFO] [stdout]   --> tests/basic.rs:96:10
[INFO] [stdout]    |
[INFO] [stdout] 96 | #[derive(Trace)]
[INFO] [stdout]    |          ^^^^^ missing `NEEDS_DROP`, `visit_inside_gc` in implementation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `Trace` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout]    = help: implement the missing item: `const NEEDS_DROP: bool = true;`
[INFO] [stdout]    = help: implement the missing item: `unsafe fn visit_inside_gc<V, Id, Self>(_: &mut Gc<'gc, Self, Id>, _: &mut V) -> Result<(), <V as GcVisitor>::Err> where V: GcVisitor, Id: CollectorId, Self: GcSafe { todo!() }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 39 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0046, E0438, E0576.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0046`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `zerogc-derive`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0d3d42c192967e1efb9afbc3437837018d0ae26e074144d762d549080d2909eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d3d42c192967e1efb9afbc3437837018d0ae26e074144d762d549080d2909eb", kill_on_drop: false }`
[INFO] [stdout] 0d3d42c192967e1efb9afbc3437837018d0ae26e074144d762d549080d2909eb