[INFO] updating cached repository https://github.com/andysalerno/async_crawl
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] [stderr] From https://github.com/andysalerno/async_crawl
[INFO] [stderr]    25feed3..9178a4b  master     -> master
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9178a4b486960ac3208cfeebba5ede6352e87322
[INFO] checking andysalerno/async_crawl against try#22dd2dd1dc07f63ae9394352d412f020d2985684 for pr-74627
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandysalerno%2Fasync_crawl" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andysalerno/async_crawl on toolchain 22dd2dd1dc07f63ae9394352d412f020d2985684
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+22dd2dd1dc07f63ae9394352d412f020d2985684" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/andysalerno/async_crawl
[INFO] finished tweaking git repo https://github.com/andysalerno/async_crawl
[INFO] tweaked toml for git repo https://github.com/andysalerno/async_crawl written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/andysalerno/async_crawl already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+22dd2dd1dc07f63ae9394352d412f020d2985684" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+22dd2dd1dc07f63ae9394352d412f020d2985684" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 508b70f43686afd9b7118d3fc6fac62e0a99d880eabc2bd32ac1764e1bbc9890
[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" "508b70f43686afd9b7118d3fc6fac62e0a99d880eabc2bd32ac1764e1bbc9890", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "508b70f43686afd9b7118d3fc6fac62e0a99d880eabc2bd32ac1764e1bbc9890", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "508b70f43686afd9b7118d3fc6fac62e0a99d880eabc2bd32ac1764e1bbc9890", kill_on_drop: false }`
[INFO] [stdout] 508b70f43686afd9b7118d3fc6fac62e0a99d880eabc2bd32ac1764e1bbc9890
[INFO] running `Command { std: "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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+22dd2dd1dc07f63ae9394352d412f020d2985684" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 101f4fac9ec07e134f4689fe3041e01c396d9f39cfc62959f39a796f2a397481
[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" "101f4fac9ec07e134f4689fe3041e01c396d9f39cfc62959f39a796f2a397481", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking event-listener v2.3.0
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]     Checking fastrand v1.3.3
[INFO] [stderr]     Checking waker-fn v1.0.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking concurrent-queue v1.2.0
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking async-channel v1.4.0
[INFO] [stderr]     Checking futures-lite v0.1.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking blocking v0.4.7
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking smol v0.1.18
[INFO] [stderr]     Checking async-std v1.6.2
[INFO] [stderr]     Checking async_crawl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/dir_work.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use std::path::{Path, PathBuf};
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `unbounded`
[INFO] [stdout]   --> src/main.rs:24:34
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crossbeam_channel::{bounded, unbounded};
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/dir_work.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use std::path::{Path, PathBuf};
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `unbounded`
[INFO] [stdout]   --> src/main.rs:24:34
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crossbeam_channel::{bounded, unbounded};
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `async_action`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let async_action = |work: AsyncDirWork| {
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_async_action`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/async_recursive_crawler.rs:20:65
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn crawl<F: Fn(AsyncDirWork)>(self, path: &std::path::Path, f: F) {
[INFO] [stdout]    |                                                                 ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/async_recursive_crawler.rs:49:33
[INFO] [stdout]    |
[INFO] [stdout] 49 |     async fn handle_file(&self, path: &Path) {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `async_action`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let async_action = |work: AsyncDirWork| {
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_async_action`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/async_recursive_crawler.rs:20:65
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn crawl<F: Fn(AsyncDirWork)>(self, path: &std::path::Path, f: F) {
[INFO] [stdout]    |                                                                 ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/async_recursive_crawler.rs:49:33
[INFO] [stdout]    |
[INFO] [stdout] 49 |     async fn handle_file(&self, path: &Path) {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_crawler`
[INFO] [stdout]  --> src/async_recursive_crawler.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) fn make_crawler() -> impl AsyncCrawler {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_crawler`
[INFO] [stdout]  --> src/async_scaled_crawler.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub(crate) fn make_crawler(task_count: usize) -> impl AsyncCrawler {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_symlink`
[INFO] [stdout]   --> src/dir_work.rs:32:23
[INFO] [stdout]    |
[INFO] [stdout] 32 |         pub(crate) fn is_symlink(&self) -> bool {
[INFO] [stdout]    |                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     stdout_thread.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/singlethread_crawler.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             self.run_one(work, &f);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/threaded_scaled_crawler.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |             self.run_one(work.unwrap());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_crawler`
[INFO] [stdout]  --> src/async_recursive_crawler.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) fn make_crawler() -> impl AsyncCrawler {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_crawler`
[INFO] [stdout]  --> src/async_scaled_crawler.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub(crate) fn make_crawler(task_count: usize) -> impl AsyncCrawler {
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_symlink`
[INFO] [stdout]   --> src/dir_work.rs:32:23
[INFO] [stdout]    |
[INFO] [stdout] 32 |         pub(crate) fn is_symlink(&self) -> bool {
[INFO] [stdout]    |                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     stdout_thread.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/singlethread_crawler.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             self.run_one(work, &f);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/threaded_scaled_crawler.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |             self.run_one(work.unwrap());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.62s
[INFO] running `Command { std: "docker" "inspect" "101f4fac9ec07e134f4689fe3041e01c396d9f39cfc62959f39a796f2a397481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "101f4fac9ec07e134f4689fe3041e01c396d9f39cfc62959f39a796f2a397481", kill_on_drop: false }`
[INFO] [stdout] 101f4fac9ec07e134f4689fe3041e01c396d9f39cfc62959f39a796f2a397481