[INFO] updating cached repository volodg/IOSCleanRust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/volodg/IOSCleanRust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/volodg/IOSCleanRust" "work/ex/beta-1.38-1/sources/1.37.0/gh/volodg/IOSCleanRust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/volodg/IOSCleanRust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/volodg/IOSCleanRust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volodg/IOSCleanRust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volodg/IOSCleanRust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 55a168cf05c4ad8b2f89b330b29fe43958c3cce0
[INFO] sha for GitHub repo volodg/IOSCleanRust: 55a168cf05c4ad8b2f89b330b29fe43958c3cce0
[INFO] validating manifest of volodg/IOSCleanRust on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of volodg/IOSCleanRust on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing volodg/IOSCleanRust
[INFO] finished frobbing volodg/IOSCleanRust
[INFO] frobbed toml for volodg/IOSCleanRust written to work/ex/beta-1.38-1/sources/1.37.0/gh/volodg/IOSCleanRust/Cargo.toml
[INFO] started frobbing volodg/IOSCleanRust
[INFO] finished frobbing volodg/IOSCleanRust
[INFO] frobbed toml for volodg/IOSCleanRust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volodg/IOSCleanRust/Cargo.toml
[INFO] crate volodg/IOSCleanRust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing volodg/IOSCleanRust against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volodg/IOSCleanRust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 7fc19c3ca317a5be0ab66daf1701eccfd85e58423be15333baad61eb4a952ba8
[INFO] running `"docker" "start" "-a" "7fc19c3ca317a5be0ab66daf1701eccfd85e58423be15333baad61eb4a952ba8"`
[INFO] [stderr]    Compiling rust_example_app v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `"docker" "inspect" "7fc19c3ca317a5be0ab66daf1701eccfd85e58423be15333baad61eb4a952ba8"`
[INFO] running `"docker" "rm" "-f" "7fc19c3ca317a5be0ab66daf1701eccfd85e58423be15333baad61eb4a952ba8"`
[INFO] [stdout] 7fc19c3ca317a5be0ab66daf1701eccfd85e58423be15333baad61eb4a952ba8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volodg/IOSCleanRust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1c9a2c7f0209cba9a93505c9d54e6cb723d48f52d3fda94e7817e3fc547bbbc0
[INFO] running `"docker" "start" "-a" "1c9a2c7f0209cba9a93505c9d54e6cb723d48f52d3fda94e7817e3fc547bbbc0"`
[INFO] [stderr]    Compiling rust_example_app v0.0.1 (/opt/crater/workdir)
[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] error: entry symbol `main` defined multiple times
[INFO] [stderr]   |
[INFO] [stderr]   = help: did you use `#[no_mangle]` on `fn main`? Use `#[start]` instead
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rust_example_app`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1c9a2c7f0209cba9a93505c9d54e6cb723d48f52d3fda94e7817e3fc547bbbc0"`
[INFO] running `"docker" "rm" "-f" "1c9a2c7f0209cba9a93505c9d54e6cb723d48f52d3fda94e7817e3fc547bbbc0"`
[INFO] [stdout] 1c9a2c7f0209cba9a93505c9d54e6cb723d48f52d3fda94e7817e3fc547bbbc0