[INFO] fetching crate gc 0.3.3...
[INFO] checking gc-0.3.3 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate gc 0.3.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate gc 0.3.3 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate gc 0.3.3
[INFO] finished tweaking crates.io crate gc 0.3.3
[INFO] tweaked toml for crates.io crate gc 0.3.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7a3cc91ab1f9fb32b01a96bc1c6e1979fc8a0da736d45c82ce3f4a7fe2473782
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "7a3cc91ab1f9fb32b01a96bc1c6e1979fc8a0da736d45c82ce3f4a7fe2473782"`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking gc v0.3.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/gc.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | /// Whether or not the thread is currently in the sweep phase of garbage collection.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macros
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/gc.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | /// During this phase, attempts to dereference a `Gc<T>` pointer will trigger a panic.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macros
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/gc.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | /// The garbage collector's internal state.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macros
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/gc.rs:18:39
[INFO] [stderr]    |
[INFO] [stderr] 18 |     boxes_start: Option<NonNull<GcBox<Trace>>>,
[INFO] [stderr]    |                                       ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/gc.rs:72:32
[INFO] [stderr]    |
[INFO] [stderr] 72 |     next: Option<NonNull<GcBox<Trace>>>,
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/gc.rs:155:45
[INFO] [stderr]     |
[INFO] [stderr] 155 |         incoming: *mut Option<NonNull<GcBox<Trace>>>,
[INFO] [stderr]     |                                             ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/gc.rs:156:29
[INFO] [stderr]     |
[INFO] [stderr] 156 |         this: NonNull<GcBox<Trace>>,
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/gc.rs:158:52
[INFO] [stderr]     |
[INFO] [stderr] 158 |     unsafe fn mark(head: &mut Option<NonNull<GcBox<Trace>>>) -> Vec<Unmarked> {
[INFO] [stderr]     |                                                    ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling gc_derive v0.3.2
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/gc.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | /// Whether or not the thread is currently in the sweep phase of garbage collection.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macros
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/gc.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | /// During this phase, attempts to dereference a `Gc<T>` pointer will trigger a panic.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macros
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/gc.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | /// The garbage collector's internal state.
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macros
[INFO] [stderr]    |
[INFO] [stderr]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/gc.rs:18:39
[INFO] [stderr]    |
[INFO] [stderr] 18 |     boxes_start: Option<NonNull<GcBox<Trace>>>,
[INFO] [stderr]    |                                       ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/gc.rs:72:32
[INFO] [stderr]    |
[INFO] [stderr] 72 |     next: Option<NonNull<GcBox<Trace>>>,
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/gc.rs:155:45
[INFO] [stderr]     |
[INFO] [stderr] 155 |         incoming: *mut Option<NonNull<GcBox<Trace>>>,
[INFO] [stderr]     |                                             ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/gc.rs:156:29
[INFO] [stderr]     |
[INFO] [stderr] 156 |         this: NonNull<GcBox<Trace>>,
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/gc.rs:158:52
[INFO] [stderr]     |
[INFO] [stderr] 158 |     unsafe fn mark(head: &mut Option<NonNull<GcBox<Trace>>>) -> Vec<Unmarked> {
[INFO] [stderr]     |                                                    ^^^^^ help: use `dyn`: `dyn Trace`
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.54s
[INFO] running `"docker" "inspect" "7a3cc91ab1f9fb32b01a96bc1c6e1979fc8a0da736d45c82ce3f4a7fe2473782"`
[INFO] running `"docker" "rm" "-f" "7a3cc91ab1f9fb32b01a96bc1c6e1979fc8a0da736d45c82ce3f4a7fe2473782"`
[INFO] [stdout] 7a3cc91ab1f9fb32b01a96bc1c6e1979fc8a0da736d45c82ce3f4a7fe2473782