[INFO] crate rsoundio 0.1.6 is already in cache
[INFO] extracting crate rsoundio 0.1.6 into work/ex/beta-1.37-6/sources/1.36.0/reg/rsoundio/0.1.6
[INFO] extracting crate rsoundio 0.1.6 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rsoundio/0.1.6
[INFO] validating manifest of rsoundio-0.1.6 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rsoundio-0.1.6 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rsoundio-0.1.6
[INFO] finished frobbing rsoundio-0.1.6
[INFO] frobbed toml for rsoundio-0.1.6 written to work/ex/beta-1.37-6/sources/1.36.0/reg/rsoundio/0.1.6/Cargo.toml
[INFO] started frobbing rsoundio-0.1.6
[INFO] finished frobbing rsoundio-0.1.6
[INFO] frobbed toml for rsoundio-0.1.6 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rsoundio/0.1.6/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rsoundio-0.1.6 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rsoundio/0.1.6:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] faeb4f329a17f0e45ab174af7e609b64f2f44b2745af7441521843b146289970
[INFO] running `"docker" "start" "-a" "faeb4f329a17f0e45ab174af7e609b64f2f44b2745af7441521843b146289970"`
[INFO] [stderr]    Compiling rsoundio v0.1.6 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `host`
[INFO] [stderr]   --> build.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let host = env::var("HOST").unwrap();
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_host`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `target`
[INFO] [stderr]   --> build.rs:77:10
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn build(target: String) {
[INFO] [stderr]    |          ^^^^^^ help: consider prefixing with an underscore: `_target`
[INFO] [stderr] 
[INFO] [stderr] error: failed to run custom build command for `rsoundio v0.1.6 (/opt/crater/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/rsoundio-e610272d144d992f/build-script-build` (exit code: 101)
[INFO] [stderr] --- stdout
[INFO] [stderr] cargo:rustc-link-lib=dylib=soundio
[INFO] [stderr] cargo:rustc-link-search=native=/opt/crater/target/debug/build/rsoundio-4c0fdd458dca08fa/out/lib
[INFO] [stderr] cargo:include=/opt/crater/target/debug/build/rsoundio-4c0fdd458dca08fa/out/include
[INFO] [stderr] cargo:root=/opt/crater/target/debug/build/rsoundio-4c0fdd458dca08fa/out
[INFO] [stderr] 
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at '/opt/crater/target/debug/build/rsoundio-4c0fdd458dca08fa/out/libsoundio-1.1.0/build: No such file or directory (os error 2)', build.rs:108:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55771090bb03 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6485381528590a55
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stderr]    1:     0x557710906ffb - std::sys_common::backtrace::_print::h49a82ae9552e35c7
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stderr]    2:     0x55771090a8f6 - std::panicking::default_hook::{{closure}}::he20974adbefcc046
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:197
[INFO] [stderr]    3:     0x55771090a689 - std::panicking::default_hook::he4af6af4ac7fef7b
[INFO] [stderr]                                at src/libstd/panicking.rs:211
[INFO] [stderr]    4:     0x55771090af4f - std::panicking::rust_panic_with_hook::h057ff03eb4c8000f
[INFO] [stderr]                                at src/libstd/panicking.rs:474
[INFO] [stderr]    5:     0x5577108b9742 - std::panicking::begin_panic::h024f59a53411355e
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:408
[INFO] [stderr]    6:     0x5577108b8549 - build_script_build::build::hc82e67bcadd19daf
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:108
[INFO] [stderr]    7:     0x5577108b6c49 - build_script_build::linux::h1b1c6e8b0e72228c
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:51
[INFO] [stderr]    8:     0x5577108b6e1c - build_script_build::main::h4a91ee2656a3c1b8
[INFO] [stderr]                                at /opt/crater/workdir/build.rs:66
[INFO] [stderr]    9:     0x5577108b947f - std::rt::lang_start::{{closure}}::he90fe1d130d8305e
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64
[INFO] [stderr]   10:     0x55771090a9a2 - std::panicking::try::do_call::hc3d8373a0b215f51
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]                                at src/libstd/panicking.rs:293
[INFO] [stderr]   11:     0x557710911cc9 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stderr]   12:     0x55771090b45c - std::rt::lang_start_internal::he5218c8b95d395f2
[INFO] [stderr]                                at src/libstd/panicking.rs:272
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   13:     0x5577108b9458 - std::rt::lang_start::h6bc00229f7b0399e
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64
[INFO] [stderr]   14:     0x5577108b8e49 - main
[INFO] [stderr]   15:     0x7f453fc032e0 - __libc_start_main
[INFO] [stderr]   16:     0x5577108b6709 - _start
[INFO] [stderr]   17:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] running `"docker" "inspect" "faeb4f329a17f0e45ab174af7e609b64f2f44b2745af7441521843b146289970"`
[INFO] running `"docker" "rm" "-f" "faeb4f329a17f0e45ab174af7e609b64f2f44b2745af7441521843b146289970"`
[INFO] [stdout] faeb4f329a17f0e45ab174af7e609b64f2f44b2745af7441521843b146289970