[INFO] cloning repository https://github.com/khionu/sudoku_solver
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/khionu/sudoku_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhionu%2Fsudoku_solver"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhionu%2Fsudoku_solver'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 84c98ab4002e56403bfe6b0a2a58a56d968eddf9
[INFO] checking khionu/sudoku_solver against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhionu%2Fsudoku_solver" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/khionu/sudoku_solver on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/khionu/sudoku_solver
[INFO] finished tweaking git repo https://github.com/khionu/sudoku_solver
[INFO] tweaked toml for git repo https://github.com/khionu/sudoku_solver written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/khionu/sudoku_solver already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f28fbbdba9f84a13d5c605cb25bcedd0489602df32b60464fd14ef963bf74923
[INFO] running `"docker" "start" "-a" "f28fbbdba9f84a13d5c605cb25bcedd0489602df32b60464fd14ef963bf74923"`
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking sudoku_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0599]: no function or associated item named `from_str` found for type `usize` in the current scope
[INFO] [stderr]   --> src/main.rs:75:26
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let threads = usize::from_str(std::env::var("RUST_SUDOKU_THREADS")
[INFO] [stderr]    |                          ^^^^^^^^ function or associated item not found in `usize`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stderr]    |
[INFO] [stderr] 3  | use std::str::FromStr;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `sudoku_solver`.
[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] [stderr] error[E0599]: no function or associated item named `from_str` found for type `usize` in the current scope
[INFO] [stderr]   --> src/main.rs:75:26
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let threads = usize::from_str(std::env::var("RUST_SUDOKU_THREADS")
[INFO] [stderr]    |                          ^^^^^^^^ function or associated item not found in `usize`
[INFO] [stderr]    |
[INFO] [stderr]    = help: items from traits can only be used if the trait is in scope
[INFO] [stderr] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stderr]    |
[INFO] [stderr] 3  | use std::str::FromStr;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `sudoku_solver`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f28fbbdba9f84a13d5c605cb25bcedd0489602df32b60464fd14ef963bf74923"`
[INFO] running `"docker" "rm" "-f" "f28fbbdba9f84a13d5c605cb25bcedd0489602df32b60464fd14ef963bf74923"`
[INFO] [stdout] f28fbbdba9f84a13d5c605cb25bcedd0489602df32b60464fd14ef963bf74923