[INFO] crate gc 0.3.2 is already in cache
[INFO] extracting crate gc 0.3.2 into work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/gc/0.3.2
[INFO] extracting crate gc 0.3.2 into work/ex/pr-60174/sources/try#74092351c05ae61047b2be02024415546595e974/reg/gc/0.3.2
[INFO] validating manifest of gc-0.3.2 on toolchain master#e305df1846a6d985315917ae0c81b74af8b4e641
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of gc-0.3.2 on toolchain try#74092351c05ae61047b2be02024415546595e974
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing gc-0.3.2
[INFO] finished frobbing gc-0.3.2
[INFO] frobbed toml for gc-0.3.2 written to work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/gc/0.3.2/Cargo.toml
[INFO] started frobbing gc-0.3.2
[INFO] finished frobbing gc-0.3.2
[INFO] frobbed toml for gc-0.3.2 written to work/ex/pr-60174/sources/try#74092351c05ae61047b2be02024415546595e974/reg/gc/0.3.2/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+74092351c05ae61047b2be02024415546595e974-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking gc-0.3.2 against master#e305df1846a6d985315917ae0c81b74af8b4e641 for pr-60174
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60174/worker-4/master#e305df1846a6d985315917ae0c81b74af8b4e641:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60174/sources/master#e305df1846a6d985315917ae0c81b74af8b4e641/reg/gc/0.3.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e305df1846a6d985315917ae0c81b74af8b4e641-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2a4c8ce7297bdc41a1fa4029b5c4b51edf171c88798035eb13b0002ad22580c8
[INFO] running `"docker" "start" "-a" "2a4c8ce7297bdc41a1fa4029b5c4b51edf171c88798035eb13b0002ad22580c8"`
[INFO] [stderr]     Checking gc v0.3.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/gc.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | / /// Whether or not the thread is currently in the sweep phase of garbage collection.
[INFO] [stderr] 45 | | /// During this phase, attempts to dereference a `Gc<T>` pointer will trigger a panic.
[INFO] [stderr]    | |______________________________________________________________________________________^
[INFO] [stderr] 46 |   thread_local!(pub static GC_DROPPING: Cell<bool> = Cell::new(false));
[INFO] [stderr]    |   --------------------------------------------------------------------- rustdoc does not generate documentation for macro expansions
[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:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 |   /// The garbage collector's internal state.
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 64 | / thread_local!(static GC_STATE: RefCell<GcState> = RefCell::new(GcState {
[INFO] [stderr] 65 | |     bytes_allocated: 0,
[INFO] [stderr] 66 | |     threshold: INITIAL_THRESHOLD,
[INFO] [stderr] 67 | |     boxes_start: None,
[INFO] [stderr] 68 | | }));
[INFO] [stderr]    | |____- rustdoc does not generate documentation for macro expansions
[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:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | / /// Whether or not the thread is currently in the sweep phase of garbage collection.
[INFO] [stderr] 45 | | /// During this phase, attempts to dereference a `Gc<T>` pointer will trigger a panic.
[INFO] [stderr]    | |______________________________________________________________________________________^
[INFO] [stderr] 46 |   thread_local!(pub static GC_DROPPING: Cell<bool> = Cell::new(false));
[INFO] [stderr]    |   --------------------------------------------------------------------- rustdoc does not generate documentation for macro expansions
[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:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 |   /// The garbage collector's internal state.
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 64 | / thread_local!(static GC_STATE: RefCell<GcState> = RefCell::new(GcState {
[INFO] [stderr] 65 | |     bytes_allocated: 0,
[INFO] [stderr] 66 | |     threshold: INITIAL_THRESHOLD,
[INFO] [stderr] 67 | |     boxes_start: None,
[INFO] [stderr] 68 | | }));
[INFO] [stderr]    | |____- rustdoc does not generate documentation for macro expansions
[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: unnecessary `unsafe` block
[INFO] [stderr]    --> src/lib.rs:396:9
[INFO] [stderr]     |
[INFO] [stderr] 396 |         unsafe { self.cell.into_inner() }
[INFO] [stderr]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_unsafe)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/lib.rs:396:9
[INFO] [stderr]     |
[INFO] [stderr] 396 |         unsafe { self.cell.into_inner() }
[INFO] [stderr]     |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_unsafe)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.77s
[INFO] running `"docker" "inspect" "2a4c8ce7297bdc41a1fa4029b5c4b51edf171c88798035eb13b0002ad22580c8"`
[INFO] running `"docker" "rm" "-f" "2a4c8ce7297bdc41a1fa4029b5c4b51edf171c88798035eb13b0002ad22580c8"`
[INFO] [stdout] 2a4c8ce7297bdc41a1fa4029b5c4b51edf171c88798035eb13b0002ad22580c8