[INFO] updating cached repository https://github.com/cantsin/pcgs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/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] d11ad86a8fe9b569980001ad9c92948408fff77c
[INFO] testing cantsin/pcgs against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcantsin%2Fpcgs" "work/builds/worker-10/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cantsin/pcgs on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cantsin/pcgs
[INFO] finished tweaking git repo https://github.com/cantsin/pcgs
[INFO] tweaked toml for git repo https://github.com/cantsin/pcgs written to work/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/cantsin/pcgs already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/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=warn" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] ad40a3a519829d8a6d24381586d91f1b4af04928d065e0b8268835497959c78c
[INFO] running `"docker" "start" "-a" "ad40a3a519829d8a6d24381586d91f1b4af04928d065e0b8268835497959c78c"`
[INFO] [stderr]    Compiling pcgs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/sparse_symmetric_matrix.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 |         writeln!(f, "sparse({:?},...", rows);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/sparse_symmetric_matrix.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |         writeln!(f, "       {:?},...", columns);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sparse_row_matrix.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |         writeln!(f, "sparse({:?},...", rows);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/sparse_row_matrix.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |         writeln!(f, "       {:?},...", columns);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.61s
[INFO] running `"docker" "inspect" "ad40a3a519829d8a6d24381586d91f1b4af04928d065e0b8268835497959c78c"`
[INFO] running `"docker" "rm" "-f" "ad40a3a519829d8a6d24381586d91f1b4af04928d065e0b8268835497959c78c"`
[INFO] [stdout] ad40a3a519829d8a6d24381586d91f1b4af04928d065e0b8268835497959c78c
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-10/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/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=warn" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 57d7ecdea7660ad03afdfec0a8619abfe0117f3f19f2898835b64b24f35da77b
[INFO] running `"docker" "start" "-a" "57d7ecdea7660ad03afdfec0a8619abfe0117f3f19f2898835b64b24f35da77b"`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling cc v1.0.22
[INFO] [stderr]    Compiling rustml v0.0.7
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr] error: failed to run custom build command for `rustml v0.0.7`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/rustml-626ceacc2a76a2d6/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] /usr/bin/ld: cannot find -lopencv_highgui
[INFO] [stderr] collect2: error: ld returned 1 exit status
[INFO] [stderr] thread 'main' panicked at '
[INFO] [stderr] 
[INFO] [stderr] OpenCV not found. On Ubuntu try 'sudo apt-get install libopencv-highgui-dev' before continuing.', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustml-0.0.7/build.rs:25:5
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55d29d7026cb - backtrace::backtrace::libunwind::trace::h89fcc71e59e3bc5b
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x55d29d7026cb - backtrace::backtrace::trace_unsynchronized::h0bad9be1379e729a
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55d29d7026cb - std::sys_common::backtrace::_print::hd3382a1f33c473da
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x55d29d7026cb - std::sys_common::backtrace::print::h0ec6f03cfb8e76a6
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x55d29d7026cb - std::panicking::default_hook::{{closure}}::h96cbf7b454e3f557
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x55d29d7023a6 - std::panicking::default_hook::h95a8f00337383d83
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x55d29d702d8d - std::panicking::rust_panic_with_hook::h92f98b46e22f14ed
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x55d29d6f1b40 - std::panicking::begin_panic::h9bc8cd1ea23535ec
[INFO] [stderr]                                at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x55d29d6f2579 - build_script_build::try_gcc::he5a1baec4f98654d
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustml-0.0.7/build.rs:25
[INFO] [stderr]    9:     0x55d29d6f2687 - build_script_build::main::h84e37530e297a8cb
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustml-0.0.7/build.rs:30
[INFO] [stderr]   10:     0x55d29d6f8280 - std::rt::lang_start::{{closure}}::h9af4d5661d95fff5
[INFO] [stderr]                                at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54/src/libstd/rt.rs:64
[INFO] [stderr]   11:     0x55d29d7027e3 - std::rt::lang_start_internal::{{closure}}::h4e93c1949c7a1955
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   12:     0x55d29d7027e3 - std::panicking::try::do_call::h9440ccd4dc467eaa
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   13:     0x55d29d708aea - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   14:     0x55d29d70329d - std::panicking::try::hc046e7ee42ee744f
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   15:     0x55d29d70329d - std::panic::catch_unwind::h27dfc457c200aee0
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   16:     0x55d29d70329d - std::rt::lang_start_internal::hea1b49a567afe309
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   17:     0x55d29d6f8259 - std::rt::lang_start::hbc7e8a9a2ae4d0e7
[INFO] [stderr]                                at /rustc/625451e376bb2e5283fc4741caa0a3e8a2ca4d54/src/libstd/rt.rs:64
[INFO] [stderr]   18:     0x55d29d6f26fa - main
[INFO] [stderr]   19:     0x7f54150c4b97 - __libc_start_main
[INFO] [stderr]   20:     0x55d29d6eaf6a - _start
[INFO] [stderr]   21:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "57d7ecdea7660ad03afdfec0a8619abfe0117f3f19f2898835b64b24f35da77b"`
[INFO] running `"docker" "rm" "-f" "57d7ecdea7660ad03afdfec0a8619abfe0117f3f19f2898835b64b24f35da77b"`
[INFO] [stdout] 57d7ecdea7660ad03afdfec0a8619abfe0117f3f19f2898835b64b24f35da77b