[INFO] updating cached repository https://github.com/whatisaphone/genawaiter
[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] [stderr] From https://github.com/whatisaphone/genawaiter
[INFO] [stderr]    62d9072..c1696e9  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c1696e9a97fd466fe82139608fdc6a3d570d2680
[INFO] checking whatisaphone/genawaiter against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhatisaphone%2Fgenawaiter" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/whatisaphone/genawaiter on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/whatisaphone/genawaiter
[INFO] removed workspace from git repo https://github.com/whatisaphone/genawaiter
[INFO] removed path dependency genawaiter-macro from git repo https://github.com/whatisaphone/genawaiter
[INFO] removed path dependency genawaiter-proc-macro from git repo https://github.com/whatisaphone/genawaiter
[INFO] finished tweaking git repo https://github.com/whatisaphone/genawaiter
[INFO] tweaked toml for git repo https://github.com/whatisaphone/genawaiter written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/whatisaphone/genawaiter already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-7/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "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] 3fa0f00d93e5df832772fdcdcd42417099e319fad3cfe31b6b44df2a734ae8b4
[INFO] running `"docker" "start" "-a" "3fa0f00d93e5df832772fdcdcd42417099e319fad3cfe31b6b44df2a734ae8b4"`
[INFO] [stderr]     Checking genawaiter-macro v0.99.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]     Checking trybuild v1.0.25
[INFO] [stderr]    Compiling genawaiter-proc-macro v0.99.1
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking genawaiter v0.99.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]    --> src/rc/generator.rs:31:22
[INFO] [stderr]     |
[INFO] [stderr] 31  |         let future = { Box::pin(producer(Co::new(airlock.clone()))) };
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/lib.rs:260:73
[INFO] [stderr]     |
[INFO] [stderr] 260 | #![warn(future_incompatible, rust_2018_compatibility, rust_2018_idioms, unused)]
[INFO] [stderr]     |                                                                         ^^^^^^
[INFO] [stderr]     = note: `#[warn(unused_braces)]` implied by `#[warn(unused)]`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]   --> src/sync/generator.rs:31:22
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let future = { Box::pin(producer(Co::new(airlock.clone()))) };
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]    --> src/rc/generator.rs:31:22
[INFO] [stderr]     |
[INFO] [stderr] 31  |         let future = { Box::pin(producer(Co::new(airlock.clone()))) };
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]    --> src/lib.rs:260:73
[INFO] [stderr]     |
[INFO] [stderr] 260 | #![warn(future_incompatible, rust_2018_compatibility, rust_2018_idioms, unused)]
[INFO] [stderr]     |                                                                         ^^^^^^
[INFO] [stderr]     = note: `#[warn(unused_braces)]` implied by `#[warn(unused)]`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]   --> src/sync/generator.rs:31:22
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let future = { Box::pin(producer(Co::new(airlock.clone()))) };
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> examples/linked_list.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 | /             gen!({
[INFO] [stderr] 49 | |                 while let Some(next) = current {
[INFO] [stderr] 50 | |                     yield_!(&next.val);
[INFO] [stderr] 51 | |                     current = &next.next;
[INFO] [stderr] 52 | |                 }
[INFO] [stderr] 53 | |             })
[INFO] [stderr]    | |              ^
[INFO] [stderr]    | |              |
[INFO] [stderr]    | |______________cannot borrow as mutable
[INFO] [stderr]    |                help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `genawaiter`.
[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[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> examples/error_propagation.rs:25:23
[INFO] [stderr]    |
[INFO] [stderr] 25 |           let counter = gen!({
[INFO] [stderr]    |  _______________________^
[INFO] [stderr] 26 | |             for num in 0..10 {
[INFO] [stderr] 27 | |                 // Perform some fallible operation, and yield the result (or the error)
[INFO] [stderr] 28 | |                 let string = yield_!(process(num));
[INFO] [stderr] 29 | |             }
[INFO] [stderr] 30 | |         });
[INFO] [stderr]    | |          ^
[INFO] [stderr]    | |          |
[INFO] [stderr]    | |__________cannot borrow as mutable
[INFO] [stderr]    |            help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `genawaiter`.
[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[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]    --> tests/stack.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     #[producer_fn(u8)]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     cannot borrow as mutable
[INFO] [stderr]     |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/stack.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     #[producer_fn(u8)]
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     cannot borrow as mutable
[INFO] [stderr]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/stack.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     #[producer_fn(u8)]
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     cannot borrow as mutable
[INFO] [stderr]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/stack.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     #[producer_fn(u8)]
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     cannot borrow as mutable
[INFO] [stderr]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/sync.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     #[producer_fn(u8)]
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     cannot borrow as mutable
[INFO] [stderr]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/rc.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     #[producer_fn(u8)]
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     cannot borrow as mutable
[INFO] [stderr]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/sync.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     #[producer_fn(u8)]
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     cannot borrow as mutable
[INFO] [stderr]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> tests/rc.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     #[producer_fn(u8)]
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     cannot borrow as mutable
[INFO] [stderr]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stderr]    |
[INFO] [stderr]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `genawaiter`.
[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: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `genawaiter`.
[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: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `genawaiter`.
[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" "3fa0f00d93e5df832772fdcdcd42417099e319fad3cfe31b6b44df2a734ae8b4"`
[INFO] running `"docker" "rm" "-f" "3fa0f00d93e5df832772fdcdcd42417099e319fad3cfe31b6b44df2a734ae8b4"`
[INFO] [stdout] 3fa0f00d93e5df832772fdcdcd42417099e319fad3cfe31b6b44df2a734ae8b4
