[INFO] updating cached repository https://github.com/jnferner/game-of-life
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cc410fafaf893f454e5dc96c14435ec71e5ab8c1
[INFO] checking jnferner/game-of-life against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjnferner%2Fgame-of-life" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jnferner/game-of-life on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jnferner/game-of-life
[INFO] finished tweaking git repo https://github.com/jnferner/game-of-life
[INFO] tweaked toml for git repo https://github.com/jnferner/game-of-life written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jnferner/game-of-life already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "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] dc5a3f2d0ca6bb52ec8ccde90bf92cab9ccf187fb2a8ae66d67fab40482131f8
[INFO] running `"docker" "start" "-a" "dc5a3f2d0ca6bb52ec8ccde90bf92cab9ccf187fb2a8ae66d67fab40482131f8"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling serde v1.0.69
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.11
[INFO] [stderr]    Compiling itoa v0.4.1
[INFO] [stderr]    Compiling itertools v0.4.19
[INFO] [stderr]     Checking mockers v0.12.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_span'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:284:13
[INFO] [stderr]     |
[INFO] [stderr] 284 |     Nightly(proc_macro::SourceFile, FileName),
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54725 <https://github.com/rust-lang/rust/issues/54725> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_span)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_span'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:289:20
[INFO] [stderr]     |
[INFO] [stderr] 289 |     fn nightly(sf: proc_macro::SourceFile) -> Self {
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54725 <https://github.com/rust-lang/rust/issues/54725> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_span)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::boxed::FnBox;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:3:19
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct BoxFn0<T>(Box<FnBox() -> T>);
[INFO] [stderr]   |                   ^ unused parameter
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider removing `T`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A0` is never used
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:9:19
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub struct BoxFn1<A0, T>(Box<FnBox(A0) -> T>);
[INFO] [stderr]   |                   ^^ unused parameter
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider removing `A0`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:9:23
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub struct BoxFn1<A0, T>(Box<FnBox(A0) -> T>);
[INFO] [stderr]   |                       ^ unused parameter
[INFO] [stderr]   |
[INFO] [stderr]   = help: consider removing `T`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A0` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:15:19
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub struct BoxFn2<A0, A1, T>(Box<FnBox(A0, A1) -> T>);
[INFO] [stderr]    |                   ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A0`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A1` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:15:23
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub struct BoxFn2<A0, A1, T>(Box<FnBox(A0, A1) -> T>);
[INFO] [stderr]    |                       ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A1`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:15:27
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub struct BoxFn2<A0, A1, T>(Box<FnBox(A0, A1) -> T>);
[INFO] [stderr]    |                           ^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `T`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A0` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:21:19
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct BoxFn3<A0, A1, A2, T>(Box<FnBox(A0, A1, A2) -> T>);
[INFO] [stderr]    |                   ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A0`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A1` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:21:23
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct BoxFn3<A0, A1, A2, T>(Box<FnBox(A0, A1, A2) -> T>);
[INFO] [stderr]    |                       ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A1`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A2` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:21:27
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct BoxFn3<A0, A1, A2, T>(Box<FnBox(A0, A1, A2) -> T>);
[INFO] [stderr]    |                           ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A2`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:21:31
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub struct BoxFn3<A0, A1, A2, T>(Box<FnBox(A0, A1, A2) -> T>);
[INFO] [stderr]    |                               ^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `T`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A0` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:27:19
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct BoxFn4<A0, A1, A2, A3, T>(Box<FnBox(A0, A1, A2, A3) -> T>);
[INFO] [stderr]    |                   ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A0`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A1` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:27:23
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct BoxFn4<A0, A1, A2, A3, T>(Box<FnBox(A0, A1, A2, A3) -> T>);
[INFO] [stderr]    |                       ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A1`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A2` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:27:27
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct BoxFn4<A0, A1, A2, A3, T>(Box<FnBox(A0, A1, A2, A3) -> T>);
[INFO] [stderr]    |                           ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A2`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `A3` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:27:31
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct BoxFn4<A0, A1, A2, A3, T>(Box<FnBox(A0, A1, A2, A3) -> T>);
[INFO] [stderr]    |                               ^^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `A3`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockers-0.12.0/src/box_fn.rs:27:35
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct BoxFn4<A0, A1, A2, A3, T>(Box<FnBox(A0, A1, A2, A3) -> T>);
[INFO] [stderr]    |                                   ^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `T`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 16 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0392, E0432.
[INFO] [stderr] For more information about an error, try `rustc --explain E0392`.
[INFO] [stderr] error: could not compile `mockers`.
[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[E0658]: use of unstable library feature 'proc_macro_span'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:290:45
[INFO] [stderr]     |
[INFO] [stderr] 290 |         let filename = stable::file_name(sf.path().to_string());
[INFO] [stderr]     |                                             ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54725 <https://github.com/rust-lang/rust/issues/54725> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_span)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `to_string` found for struct `std::path::PathBuf` in the current scope
[INFO] [stderr]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:290:52
[INFO] [stderr]      |
[INFO] [stderr] 290  |           let filename = stable::file_name(sf.path().to_string());
[INFO] [stderr]      |                                                      ^^^^^^^^^ help: there is an associated function with a similar name: `to_str`
[INFO] [stderr]      |
[INFO] [stderr]      = note: the method `to_string` exists but the following trait bounds were not satisfied:
[INFO] [stderr]              `std::path::PathBuf: std::fmt::Display`
[INFO] [stderr]              which is required by `std::path::PathBuf: std::string::ToString`
[INFO] [stderr]              `std::path::Path: std::fmt::Display`
[INFO] [stderr]              which is required by `std::path::Path: std::string::ToString`
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_span'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:304:44
[INFO] [stderr]     |
[INFO] [stderr] 304 |             SourceFile::Nightly(a, _) => a.is_real(),
[INFO] [stderr]     |                                            ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54725 <https://github.com/rust-lang/rust/issues/54725> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_span)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:347:27
[INFO] [stderr]     |
[INFO] [stderr] 347 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54724 <https://github.com/rust-lang/rust/issues/54724> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_def_site)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_span'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:355:69
[INFO] [stderr]     |
[INFO] [stderr] 355 |             (Span::Nightly(a), Span::Nightly(b)) => Span::Nightly(a.resolved_at(b)),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54725 <https://github.com/rust-lang/rust/issues/54725> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_span)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_span'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:363:69
[INFO] [stderr]     |
[INFO] [stderr] 363 |             (Span::Nightly(a), Span::Nightly(b)) => Span::Nightly(a.located_at(b)),
[INFO] [stderr]     |                                                                     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54725 <https://github.com/rust-lang/rust/issues/54725> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_span)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_span'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:424:55
[INFO] [stderr]     |
[INFO] [stderr] 424 |             (Span::Nightly(a), Span::Nightly(b)) => a.eq(b),
[INFO] [stderr]     |                                                       ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54725 <https://github.com/rust-lang/rust/issues/54725> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_span)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_raw_ident'
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.6/src/unstable.rs:475:48
[INFO] [stderr]     |
[INFO] [stderr] 475 |             Span::Nightly(s) => Ident::Nightly(proc_macro::Ident::new_raw(string, s)),
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #54723 <https://github.com/rust-lang/rust/issues/54723> for more information
[INFO] [stderr]     = help: add `#![feature(proc_macro_raw_ident)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0599, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `proc-macro2`.
[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 `"docker" "inspect" "dc5a3f2d0ca6bb52ec8ccde90bf92cab9ccf187fb2a8ae66d67fab40482131f8"`
[INFO] running `"docker" "rm" "-f" "dc5a3f2d0ca6bb52ec8ccde90bf92cab9ccf187fb2a8ae66d67fab40482131f8"`
[INFO] [stdout] dc5a3f2d0ca6bb52ec8ccde90bf92cab9ccf187fb2a8ae66d67fab40482131f8
