[INFO] cloning repository https://github.com/DanielKeep/calendar-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DanielKeep/calendar-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanielKeep%2Fcalendar-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanielKeep%2Fcalendar-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 399f1b0fafac49df5e52a57b350a9c8b09ea046b
[INFO] checking DanielKeep/calendar-example against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDanielKeep%2Fcalendar-example" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DanielKeep/calendar-example 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/DanielKeep/calendar-example
[INFO] finished tweaking git repo https://github.com/DanielKeep/calendar-example
[INFO] tweaked toml for git repo https://github.com/DanielKeep/calendar-example written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/DanielKeep/calendar-example 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.15
[INFO] [stderr]   Downloaded itertools v0.4.17
[INFO] [stderr]   Downloaded num v0.1.34
[INFO] [stderr]   Downloaded num-traits v0.1.34
[INFO] running `Command { std: "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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4b466e282daf39e7044a94860111cd7fdb330d0fffd907c77e68116c78389281
[INFO] running `Command { std: "docker" "start" "-a" "4b466e282daf39e7044a94860111cd7fdb330d0fffd907c77e68116c78389281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b466e282daf39e7044a94860111cd7fdb330d0fffd907c77e68116c78389281", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b466e282daf39e7044a94860111cd7fdb330d0fffd907c77e68116c78389281", kill_on_drop: false }`
[INFO] [stdout] 4b466e282daf39e7044a94860111cd7fdb330d0fffd907c77e68116c78389281
[INFO] running `Command { std: "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" "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] 7c6f85ef3ad6e3d5fe001300e0ef90fc16e68128e54c2d4655756d25d9baa603
[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" "7c6f85ef3ad6e3d5fe001300e0ef90fc16e68128e54c2d4655756d25d9baa603", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.1.34
[INFO] [stderr]     Checking libc v0.2.15
[INFO] [stderr]     Checking itertools v0.4.17
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking num v0.1.34
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]     Checking calendar v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
[INFO] [stdout]    --> bin.rs:386:23
[INFO] [stdout]     |
[INFO] [stdout] 386 | -> impl FnOnce(It) -> impl Iterator<Item=String>
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
[INFO] [stdout]    --> bin.rs:456:57
[INFO] [stdout]     |
[INFO] [stdout] 456 | fn chunks<It: Iterator>(n: usize) -> impl FnOnce(It) -> impl Iterator<Item=Vec<It::Item>> {
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:392:25
[INFO] [stdout]     |
[INFO] [stdout] 392 |         let mut iters = it.collect_vec();
[INFO] [stdout]     |                         ^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: type must be known at this point
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
[INFO] [stdout]    --> bin.rs:386:23
[INFO] [stdout]     |
[INFO] [stdout] 386 | -> impl FnOnce(It) -> impl Iterator<Item=String>
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
[INFO] [stdout]    --> bin.rs:456:57
[INFO] [stdout]     |
[INFO] [stdout] 456 | fn chunks<It: Iterator>(n: usize) -> impl FnOnce(It) -> impl Iterator<Item=Vec<It::Item>> {
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:468:31
[INFO] [stdout]     |
[INFO] [stdout] 468 |             let first = match it.next() {
[INFO] [stdout]     |                               ^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: type must be known at this point
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:506:18
[INFO] [stdout]     |
[INFO] [stdout] 506 |         .map(|r| r.into_iter()
[INFO] [stdout]     |                  ^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: type must be known at this point
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0562.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `calendar`.
[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[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:392:25
[INFO] [stdout]     |
[INFO] [stdout] 392 |         let mut iters = it.collect_vec();
[INFO] [stdout]     |                         ^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: type must be known at this point
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:468:31
[INFO] [stdout]     |
[INFO] [stdout] 468 |             let first = match it.next() {
[INFO] [stdout]     |                               ^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: type must be known at this point
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> bin.rs:506:18
[INFO] [stdout]     |
[INFO] [stdout] 506 |         .map(|r| r.into_iter()
[INFO] [stdout]     |                  ^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: type must be known at this point
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0562.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7c6f85ef3ad6e3d5fe001300e0ef90fc16e68128e54c2d4655756d25d9baa603", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c6f85ef3ad6e3d5fe001300e0ef90fc16e68128e54c2d4655756d25d9baa603", kill_on_drop: false }`
[INFO] [stdout] 7c6f85ef3ad6e3d5fe001300e0ef90fc16e68128e54c2d4655756d25d9baa603
