[INFO] updating cached repository https://github.com/letaron/tacron
[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] 80c7a770b45d2f7d5d177182307f193b17a16c6f
[INFO] checking letaron/tacron against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fletaron%2Ftacron" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/letaron/tacron on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/letaron/tacron
[INFO] finished tweaking git repo https://github.com/letaron/tacron
[INFO] tweaked toml for git repo https://github.com/letaron/tacron written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/letaron/tacron already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b9809ecb2bb4ff9d68613739dcfae99bd88f43a59ec8d6852ee3e4173cbf259e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "b9809ecb2bb4ff9d68613739dcfae99bd88f43a59ec8d6852ee3e4173cbf259e"`
[INFO] [stderr]    Compiling libc v0.2.49
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking signal-hook v0.1.8
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking tacron v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/crontab_reader.rs:48:27
[INFO] [stderr]    |
[INFO] [stderr] 48 |     readers: &mut Vec<Box<Reader + Sync + Send>>, users: &Vec<String>,
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/file_reader.rs:81:27
[INFO] [stderr]    |
[INFO] [stderr] 81 |     readers: &mut Vec<Box<Reader + Sync + Send>>, crontabs: &Vec<String>,
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:30:14
[INFO] [stderr]    |
[INFO] [stderr] 30 | ) -> Vec<Box<Reader + Sync + Send>> {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:31:30
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let mut readers: Vec<Box<Reader + Sync + Send>> = Vec::new();
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:35:26
[INFO] [stderr]    |
[INFO] [stderr] 35 |         fn(&mut Vec<Box<(Reader + Send + Sync)>>, &Vec<String>),
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Send + Sync`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:49:43
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn retrieve_tacrons(readers: &Vec<Box<Reader + Sync + Send>>) -> Vec<TaCron> {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:51:26
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let readers: Vec<Box<Reader + Sync + Send>>;
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:66:40
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn add_sighup_handler(readers: Vec<Box<Reader + Sync + Send>>, tacrons: Arc<RwLock<Vec<TaCron>>>) {
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/crontab_reader.rs:48:27
[INFO] [stderr]    |
[INFO] [stderr] 48 |     readers: &mut Vec<Box<Reader + Sync + Send>>, users: &Vec<String>,
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/file_reader.rs:81:27
[INFO] [stderr]    |
[INFO] [stderr] 81 |     readers: &mut Vec<Box<Reader + Sync + Send>>, crontabs: &Vec<String>,
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/reader/file_reader.rs:125:34
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let mut readers: Vec<Box<Reader + Sync + Send>> = Vec::new();
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:30:14
[INFO] [stderr]    |
[INFO] [stderr] 30 | ) -> Vec<Box<Reader + Sync + Send>> {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:31:30
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let mut readers: Vec<Box<Reader + Sync + Send>> = Vec::new();
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:35:26
[INFO] [stderr]    |
[INFO] [stderr] 35 |         fn(&mut Vec<Box<(Reader + Send + Sync)>>, &Vec<String>),
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Send + Sync`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reader/mod.rs:49:43
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn retrieve_tacrons(readers: &Vec<Box<Reader + Sync + Send>>) -> Vec<TaCron> {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:51:26
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let readers: Vec<Box<Reader + Sync + Send>>;
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:66:40
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn add_sighup_handler(readers: Vec<Box<Reader + Sync + Send>>, tacrons: Arc<RwLock<Vec<TaCron>>>) {
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Reader + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]   --> src/time_units/days_of_week.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         DaysOfWeek::value_from_name("foo").is_err();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]   --> src/time_units/months.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |         Months::value_from_name("foo").is_err();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you intended to assert that this is err, consider `.unwrap_err()` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.26s
[INFO] running `"docker" "inspect" "b9809ecb2bb4ff9d68613739dcfae99bd88f43a59ec8d6852ee3e4173cbf259e"`
[INFO] running `"docker" "rm" "-f" "b9809ecb2bb4ff9d68613739dcfae99bd88f43a59ec8d6852ee3e4173cbf259e"`
[INFO] [stdout] b9809ecb2bb4ff9d68613739dcfae99bd88f43a59ec8d6852ee3e4173cbf259e