[INFO] updating cached repository https://github.com/volodg/IOSCleanRust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/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] 55a168cf05c4ad8b2f89b330b29fe43958c3cce0
[INFO] checking volodg/IOSCleanRust against try#e689e5eaefe96e6dc3ed5bb629c521b7d207aff7 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvolodg%2FIOSCleanRust" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/volodg/IOSCleanRust on toolchain e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/volodg/IOSCleanRust
[INFO] finished tweaking git repo https://github.com/volodg/IOSCleanRust
[INFO] tweaked toml for git repo https://github.com/volodg/IOSCleanRust written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/volodg/IOSCleanRust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+e689e5eaefe96e6dc3ed5bb629c521b7d207aff7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d5109e73b3602ce35765148dadf94a9b225324731ff67ed697625594560afd2f
[INFO] running `"docker" "start" "-a" "d5109e73b3602ce35765148dadf94a9b225324731ff67ed697625594560afd2f"`
[INFO] [stderr]    Compiling rust_example_app v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking block v0.1.6
[INFO] [stderr] warning: unused variable: `argc`
[INFO] [stderr]  --> src/rust_example_lib.rs:8:24
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub extern "C" fn main(argc: c_int, argv: *const *const c_char) -> c_int {
[INFO] [stderr]   |                        ^^^^ help: consider prefixing with an underscore: `_argc`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `argv`
[INFO] [stderr]  --> src/rust_example_lib.rs:8:37
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub extern "C" fn main(argc: c_int, argv: *const *const c_char) -> c_int {
[INFO] [stderr]   |                                     ^^^^ help: consider prefixing with an underscore: `_argv`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `argc`
[INFO] [stderr]  --> src/rust_example_lib.rs:8:24
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub extern "C" fn main(argc: c_int, argv: *const *const c_char) -> c_int {
[INFO] [stderr]   |                        ^^^^ help: consider prefixing with an underscore: `_argc`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `argv`
[INFO] [stderr]  --> src/rust_example_lib.rs:8:37
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub extern "C" fn main(argc: c_int, argv: *const *const c_char) -> c_int {
[INFO] [stderr]   |                                     ^^^^ help: consider prefixing with an underscore: `_argv`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `"docker" "inspect" "d5109e73b3602ce35765148dadf94a9b225324731ff67ed697625594560afd2f"`
[INFO] running `"docker" "rm" "-f" "d5109e73b3602ce35765148dadf94a9b225324731ff67ed697625594560afd2f"`
[INFO] [stdout] d5109e73b3602ce35765148dadf94a9b225324731ff67ed697625594560afd2f