[INFO] cloning repository https://github.com/whatisaphone/genawaiter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/whatisaphone/genawaiter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhatisaphone%2Fgenawaiter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhatisaphone%2Fgenawaiter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 45c10c223b92da215e182bc3eff0d5e09bf813f4
[INFO] checking whatisaphone/genawaiter against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhatisaphone%2Fgenawaiter" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/whatisaphone/genawaiter on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-9/source/Cargo.toml
[INFO] crate git repo https://github.com/whatisaphone/genawaiter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-9/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded genawaiter-macro v0.99.1
[INFO] [stderr]   Downloaded proc-macro-error-attr v0.4.12
[INFO] [stderr]   Downloaded proc-macro-error v0.4.12
[INFO] [stderr]   Downloaded trybuild v1.0.34
[INFO] [stderr]   Downloaded genawaiter-proc-macro v0.99.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 292d90a1be86b86e64e572b577bb9f5bad4cc05214d8b976d069cf7584ea65f1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "292d90a1be86b86e64e572b577bb9f5bad4cc05214d8b976d069cf7584ea65f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "292d90a1be86b86e64e572b577bb9f5bad4cc05214d8b976d069cf7584ea65f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "292d90a1be86b86e64e572b577bb9f5bad4cc05214d8b976d069cf7584ea65f1", kill_on_drop: false }`
[INFO] [stdout] 292d90a1be86b86e64e572b577bb9f5bad4cc05214d8b976d069cf7584ea65f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 103a81c6d4a138cf283255adf1bb87b1d4c44bbacf89ead1467f12df809964fb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "103a81c6d4a138cf283255adf1bb87b1d4c44bbacf89ead1467f12df809964fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking genawaiter-macro v0.99.1
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling genawaiter-proc-macro v0.99.1
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking genawaiter v0.99.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking trybuild v1.0.34
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> examples/linked_list.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 | /             gen!({
[INFO] [stdout] 49 | |                 while let Some(next) = current {
[INFO] [stdout] 50 | |                     yield_!(&next.val);
[INFO] [stdout] 51 | |                     current = &next.next;
[INFO] [stdout] 52 | |                 }
[INFO] [stdout] 53 | |             })
[INFO] [stdout]    | |              ^
[INFO] [stdout]    | |              |
[INFO] [stdout]    | |______________cannot borrow as mutable
[INFO] [stdout]    |                help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[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] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/rc.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     #[producer_fn(u8)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     cannot borrow as mutable
[INFO] [stdout]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/rc.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     #[producer_fn(u8)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     cannot borrow as mutable
[INFO] [stdout]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> examples/error_propagation.rs:25:23
[INFO] [stdout]    |
[INFO] [stdout] 25 |           let counter = gen!({
[INFO] [stdout]    |  _______________________^
[INFO] [stdout] 26 | |             for num in 0..10 {
[INFO] [stdout] 27 | |                 // Perform some fallible operation, and yield the result (or the error)
[INFO] [stdout] 28 | |                 let string = yield_!(process(num));
[INFO] [stdout] 29 | |             }
[INFO] [stdout] 30 | |         });
[INFO] [stdout]    | |          ^
[INFO] [stdout]    | |          |
[INFO] [stdout]    | |__________cannot borrow as mutable
[INFO] [stdout]    |            help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> tests/stack.rs:106:5
[INFO] [stdout]     |
[INFO] [stdout] 106 |     #[producer_fn(u8)]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     cannot borrow as mutable
[INFO] [stdout]     |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/stack.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     #[producer_fn(u8)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     cannot borrow as mutable
[INFO] [stdout]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/stack.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     #[producer_fn(u8)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     cannot borrow as mutable
[INFO] [stdout]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/stack.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     #[producer_fn(u8)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     cannot borrow as mutable
[INFO] [stdout]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/sync.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     #[producer_fn(u8)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     cannot borrow as mutable
[INFO] [stdout]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `__private_co_arg__` as mutable, as it is not declared as mutable
[INFO] [stdout]   --> tests/sync.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     #[producer_fn(u8)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     cannot borrow as mutable
[INFO] [stdout]    |     help: consider changing this to be mutable: `mut __private_co_arg__`
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "103a81c6d4a138cf283255adf1bb87b1d4c44bbacf89ead1467f12df809964fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "103a81c6d4a138cf283255adf1bb87b1d4c44bbacf89ead1467f12df809964fb", kill_on_drop: false }`
[INFO] [stdout] 103a81c6d4a138cf283255adf1bb87b1d4c44bbacf89ead1467f12df809964fb
