[INFO] crate ioc 0.6.2 is already in cache
[INFO] extracting crate ioc 0.6.2 into work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/ioc/0.6.2
[INFO] extracting crate ioc 0.6.2 into work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/ioc/0.6.2
[INFO] validating manifest of ioc-0.6.2 on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ioc-0.6.2 on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ioc-0.6.2
[INFO] finished frobbing ioc-0.6.2
[INFO] frobbed toml for ioc-0.6.2 written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/reg/ioc/0.6.2/Cargo.toml
[INFO] started frobbing ioc-0.6.2
[INFO] finished frobbing ioc-0.6.2
[INFO] frobbed toml for ioc-0.6.2 written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/ioc/0.6.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ioc-0.6.2 against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-2/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/reg/ioc/0.6.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3400cb3d6e07f329b4ffa0db6633fea1312e0f0b43153f24a2be5387b2c38bc1
[INFO] running `"docker" "start" "-a" "3400cb3d6e07f329b4ffa0db6633fea1312e0f0b43153f24a2be5387b2c38bc1"`
[INFO] [stderr]     Checking downcast v0.6.0
[INFO] [stderr]     Checking ioc v0.6.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use] 
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TryLockError`
[INFO] [stderr]  --> src/container.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::sync::{TryLockError, Mutex, RwLock, RwLockReadGuard, RwLockWriteGuard};
[INFO] [stderr]   |                 ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use] 
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TryLockError`
[INFO] [stderr]  --> src/container.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::sync::{TryLockError, Mutex, RwLock, RwLockReadGuard, RwLockWriteGuard};
[INFO] [stderr]   |                 ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/container.rs:18:33
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub type ReadGuard<'a, T, Base: ?Sized> = downcast::Guard<T, RwLockReadGuard<'a, Box<Base>>>;
[INFO] [stderr]    |                                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(type_alias_bounds)] on by default
[INFO] [stderr]    = help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/container.rs:19:34
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub type WriteGuard<'a, T, Base: ?Sized> = downcast::Guard<T, RwLockWriteGuard<'a, Box<Base>>>;
[INFO] [stderr]    |                                  ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/container.rs:18:33
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub type ReadGuard<'a, T, Base: ?Sized> = downcast::Guard<T, RwLockReadGuard<'a, Box<Base>>>;
[INFO] [stderr]    |                                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(type_alias_bounds)] on by default
[INFO] [stderr]    = help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/container.rs:19:34
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub type WriteGuard<'a, T, Base: ?Sized> = downcast::Guard<T, RwLockWriteGuard<'a, Box<Base>>>;
[INFO] [stderr]    |                                  ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.90s
[INFO] running `"docker" "inspect" "3400cb3d6e07f329b4ffa0db6633fea1312e0f0b43153f24a2be5387b2c38bc1"`
[INFO] running `"docker" "rm" "-f" "3400cb3d6e07f329b4ffa0db6633fea1312e0f0b43153f24a2be5387b2c38bc1"`
[INFO] [stdout] 3400cb3d6e07f329b4ffa0db6633fea1312e0f0b43153f24a2be5387b2c38bc1