[INFO] fetching crate roundqueue 0.2.9...
[INFO] checking roundqueue-0.2.9 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate roundqueue 0.2.9 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate roundqueue 0.2.9 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate roundqueue 0.2.9
[INFO] finished tweaking crates.io crate roundqueue 0.2.9
[INFO] tweaked toml for crates.io crate roundqueue 0.2.9 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate roundqueue 0.2.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shared_child v0.3.4
[INFO] [stderr]   Downloaded git-version v0.3.4
[INFO] [stderr]   Downloaded git-version-macro v0.3.4
[INFO] [stderr]   Downloaded unix-daemonize v0.1.2
[INFO] [stderr]   Downloaded procfs v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1205b607cc9eaf99b70780716ea2e9e78951e4d6bcb09cd6aecdcb44f3f32333
[INFO] running `Command { std: "docker" "start" "-a" "1205b607cc9eaf99b70780716ea2e9e78951e4d6bcb09cd6aecdcb44f3f32333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1205b607cc9eaf99b70780716ea2e9e78951e4d6bcb09cd6aecdcb44f3f32333", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1205b607cc9eaf99b70780716ea2e9e78951e4d6bcb09cd6aecdcb44f3f32333", kill_on_drop: false }`
[INFO] [stdout] 1205b607cc9eaf99b70780716ea2e9e78951e4d6bcb09cd6aecdcb44f3f32333
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8c47d81690ac3cd6f81fa1d3ad882084f4c6ac3ca440a6f2a6d9b40789adbef
[INFO] running `Command { std: "docker" "start" "-a" "f8c47d81690ac3cd6f81fa1d3ad882084f4c6ac3ca440a6f2a6d9b40789adbef", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking libflate_lz77 v1.0.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.62
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]     Checking rle-decode-fast v1.0.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking textwrap v0.11.0
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[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking hex v0.4.2
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[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking libflate v1.0.3
[INFO] [stderr]    Compiling quote v1.0.9
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[INFO] [stderr]     Checking atty v0.2.14
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[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking shared_child v0.3.4
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking dirs v3.0.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking procfs v0.8.1
[INFO] [stderr]    Compiling git-version-macro v0.3.4
[INFO] [stderr]     Checking git-version v0.3.4
[INFO] [stderr]     Checking roundqueue v0.2.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:366:21
[INFO] [stdout]     |
[INFO] [stdout] 366 |         for node in std::fs::read_dir(my_homedir.join(RQ)) {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 366 |         while let Ok(node) = std::fs::read_dir(my_homedir.join(RQ)) {
[INFO] [stdout]     |         ~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider unwrapping the `Result` with `?` to iterate over its contents
[INFO] [stdout]     |
[INFO] [stdout] 366 |         for node in std::fs::read_dir(my_homedir.join(RQ))? {
[INFO] [stdout]     |                                                           +
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 366 |         if let Ok(node) = std::fs::read_dir(my_homedir.join(RQ)) {
[INFO] [stdout]     |         ~~~~~~~~~~    ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:366:21
[INFO] [stdout]     |
[INFO] [stdout] 366 |         for node in std::fs::read_dir(my_homedir.join(RQ)) {
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 366 |         while let Ok(node) = std::fs::read_dir(my_homedir.join(RQ)) {
[INFO] [stdout]     |         ~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider unwrapping the `Result` with `?` to iterate over its contents
[INFO] [stdout]     |
[INFO] [stdout] 366 |         for node in std::fs::read_dir(my_homedir.join(RQ))? {
[INFO] [stdout]     |                                                           +
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 366 |         if let Ok(node) = std::fs::read_dir(my_homedir.join(RQ)) {
[INFO] [stdout]     |         ~~~~~~~~~~    ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_file` and `expect_file` are never used
[INFO] [stdout]   --> tests/lib.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl TempDir {
[INFO] [stdout]    | ------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn add_file(&self, p: &str, contents: &[u8]) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn expect_file(&self, p: &str, contents: &[u8]) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.26s
[INFO] running `Command { std: "docker" "inspect" "f8c47d81690ac3cd6f81fa1d3ad882084f4c6ac3ca440a6f2a6d9b40789adbef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8c47d81690ac3cd6f81fa1d3ad882084f4c6ac3ca440a6f2a6d9b40789adbef", kill_on_drop: false }`
[INFO] [stdout] f8c47d81690ac3cd6f81fa1d3ad882084f4c6ac3ca440a6f2a6d9b40789adbef