[INFO] crate slog 2.5.2 is already in cache
[INFO] checking slog-2.5.2 against try#8810c24b0958114d8dbb32d878444e8956fce80f for pr-66063
[INFO] extracting crate slog 2.5.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate slog 2.5.2 on toolchain 8810c24b0958114d8dbb32d878444e8956fce80f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate slog 2.5.2
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate slog 2.5.2
[INFO] tweaked toml for crates.io crate slog 2.5.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=allow" "-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" "+8810c24b0958114d8dbb32d878444e8956fce80f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 96e051b92fe25d19fd72099924a2676e87f217b6abd45e9b899cb3f30df7b21f
[INFO] running `"docker" "start" "-a" "96e051b92fe25d19fd72099924a2676e87f217b6abd45e9b899cb3f30df7b21f"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling slog v2.5.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: `std::rc::Rc<std::cell::RefCell<usize>>` cannot be sent between threads safely
[INFO] [stderr]   --> examples/singlethread.rs:24:26
[INFO] [stderr]    |
[INFO] [stderr] 24 |       let sublog = log.new(o!("obj.val" => slog::FnValue(move |_| {
[INFO] [stderr]    |  __________________________^
[INFO] [stderr] 25 | |         format!("{}", obj2.val.borrow())
[INFO] [stderr] 26 | |     })));
[INFO] [stderr]    | |_______^ `std::rc::Rc<std::cell::RefCell<usize>>` cannot be sent between threads safely
[INFO] [stderr]    |
[INFO] [stderr]    = help: within `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`, the trait `std::marker::Send` is not implemented for `std::rc::Rc<std::cell::RefCell<usize>>`
[INFO] [stderr]    = note: required because it appears within the type `NoThreadSafeObject`
[INFO] [stderr]    = note: required because it appears within the type `[closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]`
[INFO] [stderr]    = note: required because it appears within the type `slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>`
[INFO] [stderr]    = note: required because it appears within the type `slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>`
[INFO] [stderr]    = note: required because it appears within the type `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required because of the requirements on the impl of `slog::SendSyncRefUnwindSafeKV` for `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required by `slog::OwnedKV`
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: `std::rc::Rc<std::cell::RefCell<usize>>` cannot be shared between threads safely
[INFO] [stderr]   --> examples/singlethread.rs:24:26
[INFO] [stderr]    |
[INFO] [stderr] 24 |       let sublog = log.new(o!("obj.val" => slog::FnValue(move |_| {
[INFO] [stderr]    |  __________________________^
[INFO] [stderr] 25 | |         format!("{}", obj2.val.borrow())
[INFO] [stderr] 26 | |     })));
[INFO] [stderr]    | |_______^ `std::rc::Rc<std::cell::RefCell<usize>>` cannot be shared between threads safely
[INFO] [stderr]    |
[INFO] [stderr]    = help: within `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`, the trait `std::marker::Sync` is not implemented for `std::rc::Rc<std::cell::RefCell<usize>>`
[INFO] [stderr]    = note: required because it appears within the type `NoThreadSafeObject`
[INFO] [stderr]    = note: required because it appears within the type `[closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]`
[INFO] [stderr]    = note: required because it appears within the type `slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>`
[INFO] [stderr]    = note: required because it appears within the type `slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>`
[INFO] [stderr]    = note: required because it appears within the type `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required because of the requirements on the impl of `slog::SendSyncRefUnwindSafeKV` for `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required by `slog::OwnedKV`
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the type `std::cell::UnsafeCell<usize>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary
[INFO] [stderr]   --> examples/singlethread.rs:24:26
[INFO] [stderr]    |
[INFO] [stderr] 24 |       let sublog = log.new(o!("obj.val" => slog::FnValue(move |_| {
[INFO] [stderr]    |  __________________________^
[INFO] [stderr] 25 | |         format!("{}", obj2.val.borrow())
[INFO] [stderr] 26 | |     })));
[INFO] [stderr]    | |_______^ `std::cell::UnsafeCell<usize>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary
[INFO] [stderr]    |
[INFO] [stderr]    = help: within `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`, the trait `std::panic::RefUnwindSafe` is not implemented for `std::cell::UnsafeCell<usize>`
[INFO] [stderr]    = note: required because it appears within the type `std::cell::RefCell<usize>`
[INFO] [stderr]    = note: required because it appears within the type `std::marker::PhantomData<std::cell::RefCell<usize>>`
[INFO] [stderr]    = note: required because it appears within the type `std::rc::Rc<std::cell::RefCell<usize>>`
[INFO] [stderr]    = note: required because it appears within the type `NoThreadSafeObject`
[INFO] [stderr]    = note: required because it appears within the type `[closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]`
[INFO] [stderr]    = note: required because it appears within the type `slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>`
[INFO] [stderr]    = note: required because it appears within the type `slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>`
[INFO] [stderr]    = note: required because it appears within the type `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required because of the requirements on the impl of `slog::SendSyncRefUnwindSafeKV` for `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required by `slog::OwnedKV`
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the type `std::cell::UnsafeCell<isize>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary
[INFO] [stderr]   --> examples/singlethread.rs:24:26
[INFO] [stderr]    |
[INFO] [stderr] 24 |       let sublog = log.new(o!("obj.val" => slog::FnValue(move |_| {
[INFO] [stderr]    |  __________________________^
[INFO] [stderr] 25 | |         format!("{}", obj2.val.borrow())
[INFO] [stderr] 26 | |     })));
[INFO] [stderr]    | |_______^ `std::cell::UnsafeCell<isize>` may contain interior mutability and a reference may not be safely transferrable across a catch_unwind boundary
[INFO] [stderr]    |
[INFO] [stderr]    = help: within `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`, the trait `std::panic::RefUnwindSafe` is not implemented for `std::cell::UnsafeCell<isize>`
[INFO] [stderr]    = note: required because it appears within the type `std::cell::Cell<isize>`
[INFO] [stderr]    = note: required because it appears within the type `std::cell::RefCell<usize>`
[INFO] [stderr]    = note: required because it appears within the type `std::marker::PhantomData<std::cell::RefCell<usize>>`
[INFO] [stderr]    = note: required because it appears within the type `std::rc::Rc<std::cell::RefCell<usize>>`
[INFO] [stderr]    = note: required because it appears within the type `NoThreadSafeObject`
[INFO] [stderr]    = note: required because it appears within the type `[closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]`
[INFO] [stderr]    = note: required because it appears within the type `slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>`
[INFO] [stderr]    = note: required because it appears within the type `slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>`
[INFO] [stderr]    = note: required because it appears within the type `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required because of the requirements on the impl of `slog::SendSyncRefUnwindSafeKV` for `(slog::SingleKV<slog::FnValue<std::string::String, [closure@examples/singlethread.rs:24:56: 26:6 obj2:NoThreadSafeObject]>>, ())`
[INFO] [stderr]    = note: required by `slog::OwnedKV`
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `slog`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "96e051b92fe25d19fd72099924a2676e87f217b6abd45e9b899cb3f30df7b21f"`
[INFO] running `"docker" "rm" "-f" "96e051b92fe25d19fd72099924a2676e87f217b6abd45e9b899cb3f30df7b21f"`
[INFO] [stdout] 96e051b92fe25d19fd72099924a2676e87f217b6abd45e9b899cb3f30df7b21f