[INFO] fetching crate cntk 0.2.1...
[INFO] documenting cntk-0.2.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate cntk 0.2.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate cntk 0.2.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cntk 0.2.1
[INFO] finished tweaking crates.io crate cntk 0.2.1
[INFO] tweaked toml for crates.io crate cntk 0.2.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lazy_static v0.2.11
[INFO] [stderr]   Downloaded num-complex v0.1.43
[INFO] [stderr]   Downloaded cpp_synmap v0.3.0
[INFO] [stderr]   Downloaded mnist v0.4.1
[INFO] [stderr]   Downloaded rawpointer v0.1.0
[INFO] [stderr]   Downloaded matrixmultiply v0.1.15
[INFO] [stderr]   Downloaded ndarray v0.10.14
[INFO] [stderr]   Downloaded itertools v0.7.11
[INFO] [stderr]   Downloaded memchr v1.0.2
[INFO] [stderr]   Downloaded cpp_syn v0.12.0
[INFO] [stderr]   Downloaded gcc v0.3.55
[INFO] [stderr]   Downloaded cpp_macros v0.3.2
[INFO] [stderr]   Downloaded cpp_synom v0.12.0
[INFO] [stderr]   Downloaded cpp v0.3.2
[INFO] [stderr]   Downloaded cpp_common v0.3.2
[INFO] [stderr]   Downloaded cpp_build v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cd7b07c10805329356b890b48d068461e611486691c5ef5e580634e81f98ec5
[INFO] running `Command { std: "docker" "start" "-a" "0cd7b07c10805329356b890b48d068461e611486691c5ef5e580634e81f98ec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cd7b07c10805329356b890b48d068461e611486691c5ef5e580634e81f98ec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cd7b07c10805329356b890b48d068461e611486691c5ef5e580634e81f98ec5", kill_on_drop: false }`
[INFO] [stdout] 0cd7b07c10805329356b890b48d068461e611486691c5ef5e580634e81f98ec5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88c9c209a78fdffe6e7a56a3ffec1ad183ec98fe884dcf469f7f7a871d3aa08e
[INFO] running `Command { std: "docker" "start" "-a" "88c9c209a78fdffe6e7a56a3ffec1ad183ec98fe884dcf469f7f7a871d3aa08e", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling ndarray v0.10.14
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling cpp_synom v0.12.0
[INFO] [stderr]    Compiling cpp_syn v0.12.0
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]    Compiling cpp_common v0.3.2
[INFO] [stderr]    Compiling cpp_synmap v0.3.0
[INFO] [stderr]    Compiling cpp_build v0.3.2
[INFO] [stderr]    Compiling cpp_macros v0.3.2
[INFO] [stderr]    Compiling cntk v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cpp v0.3.2
[INFO] [stderr] error: failed to run custom build command for `cntk v0.2.1 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/cntk-a30922a1efe7d9eb/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   TARGET = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   OPT_LEVEL = Some("0")
[INFO] [stderr]   TARGET = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   TARGET = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   HOST = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   CXXFLAGS_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   CXXFLAGS_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   HOST_CXXFLAGS = None
[INFO] [stderr]   CXXFLAGS = None
[INFO] [stderr]   DEBUG = Some("true")
[INFO] [stderr]   running: "g++-4.8" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-m64" "-I" "/opt/rustwide/workdir" "-std=c++11" "-Wall" "-Wextra" "-o" "/opt/rustwide/target/debug/build/cntk-a19d87a6e61e85f8/out/rust_cpp/cpp_closures.o" "-c" "/opt/rustwide/target/debug/build/cntk-a19d87a6e61e85f8/out/rust_cpp/cpp_closures.cpp"
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/gcc-0.3.55/src/lib.rs:1672:5:
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   Internal error occurred: Failed to find tool. Is `g++-4.8` installed?
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55e04e27adac - std::backtrace_rs::backtrace::libunwind::trace::ha637c64ce894333a
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stderr]      1:     0x55e04e27adac - std::backtrace_rs::backtrace::trace_unsynchronized::h47f62dea28e0c88d
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55e04e27adac - std::sys_common::backtrace::_print_fmt::h9eef0abe20ede486
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55e04e27adac - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hed7f999df88cc644
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55e04e2a17a0 - core::fmt::rt::Argument::fmt::h1539a9308b8d058d
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x55e04e2a17a0 - core::fmt::write::h3a39390d8560d9c9
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:1120:17
[INFO] [stderr]      6:     0x55e04e27804f - std::io::Write::write_fmt::h5fc9997dfe05f882
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:1762:15
[INFO] [stderr]      7:     0x55e04e27ab94 - std::sys_common::backtrace::_print::h894006fb5c6f3d45
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      8:     0x55e04e27ab94 - std::sys_common::backtrace::print::h23a2d212c6fff936
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      9:     0x55e04e27c3a7 - std::panicking::default_hook::{{closure}}::h8a1d2ee00185001a
[INFO] [stderr]     10:     0x55e04e27c10f - std::panicking::default_hook::h6038f2eba384e475
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:292:9
[INFO] [stderr]     11:     0x55e04e27c828 - std::panicking::rust_panic_with_hook::h2b5517d590cab22e
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:779:13
[INFO] [stderr]     12:     0x55e04e27c70e - std::panicking::begin_panic_handler::{{closure}}::h233112c06e0ef43e
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:657:13
[INFO] [stderr]     13:     0x55e04e27b276 - std::sys_common::backtrace::__rust_end_short_backtrace::h6e893f24d7ebbff8
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stderr]     14:     0x55e04e27c472 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:645:5
[INFO] [stderr]     15:     0x55e04e0cc8f5 - core::panicking::panic_fmt::hbf0e066aabfa482c
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:72:14
[INFO] [stderr]     16:     0x55e04e0f0d61 - gcc::fail::h82a910aad3d59ab4
[INFO] [stderr]     17:     0x55e04e0e43b5 - gcc::Build::compile::he2f907f618755b29
[INFO] [stderr]     18:     0x55e04e0d1963 - cpp_build::Config::build::h503058a61db9327c
[INFO] [stderr]     19:     0x55e04e0d1b21 - build_script_build::main::h6a95c6ceb3b02ee8
[INFO] [stderr]     20:     0x55e04e0cd703 - core::ops::function::FnOnce::call_once::h8616bf7c0e382700
[INFO] [stderr]     21:     0x55e04e0cd446 - std::sys_common::backtrace::__rust_begin_short_backtrace::h7ba0c2a86a10eb96
[INFO] [stderr]     22:     0x55e04e0cd519 - std::rt::lang_start::{{closure}}::h9c35d1c366cba375
[INFO] [stderr]     23:     0x55e04e274087 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hd95060ecd5e1ca24
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     24:     0x55e04e274087 - std::panicking::try::do_call::h6e8cf51db32a6e4b
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stderr]     25:     0x55e04e274087 - std::panicking::try::h3a52eefe24fe3c29
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stderr]     26:     0x55e04e274087 - std::panic::catch_unwind::h24c28c23c02c3841
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stderr]     27:     0x55e04e274087 - std::rt::lang_start_internal::{{closure}}::h705d3c9cbc06ef47
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55e04e274087 - std::panicking::try::do_call::ha21f52ba13158470
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stderr]     29:     0x55e04e274087 - std::panicking::try::h5581346bf6aeb1f8
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stderr]     30:     0x55e04e274087 - std::panic::catch_unwind::h7919645a6b72e25b
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stderr]     31:     0x55e04e274087 - std::rt::lang_start_internal::h12de51168669836e
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55e04e0cd4f7 - std::rt::lang_start::hdb503f97d1453eeb
[INFO] [stderr]     33:     0x55e04e0d1b95 - main
[INFO] [stderr]     34:     0x7fc240e37d90 - <unknown>
[INFO] [stderr]     35:     0x7fc240e37e40 - __libc_start_main
[INFO] [stderr]     36:     0x55e04e0cd105 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "88c9c209a78fdffe6e7a56a3ffec1ad183ec98fe884dcf469f7f7a871d3aa08e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88c9c209a78fdffe6e7a56a3ffec1ad183ec98fe884dcf469f7f7a871d3aa08e", kill_on_drop: false }`
[INFO] [stdout] 88c9c209a78fdffe6e7a56a3ffec1ad183ec98fe884dcf469f7f7a871d3aa08e
[INFO] documenting cntk-0.2.1 against beta-2023-12-22 for beta-1.76-rustdoc-1
[INFO] extracting crate cntk 0.2.1 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate cntk 0.2.1 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cntk 0.2.1
[INFO] finished tweaking crates.io crate cntk 0.2.1
[INFO] tweaked toml for crates.io crate cntk 0.2.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 244e273f7ff16e2d28d26f53b7f60dd4cdcda6368ec2c383c392ee8823de8e0f
[INFO] running `Command { std: "docker" "start" "-a" "244e273f7ff16e2d28d26f53b7f60dd4cdcda6368ec2c383c392ee8823de8e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "244e273f7ff16e2d28d26f53b7f60dd4cdcda6368ec2c383c392ee8823de8e0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "244e273f7ff16e2d28d26f53b7f60dd4cdcda6368ec2c383c392ee8823de8e0f", kill_on_drop: false }`
[INFO] [stdout] 244e273f7ff16e2d28d26f53b7f60dd4cdcda6368ec2c383c392ee8823de8e0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9cf63d70aea83e63c92000eed6ff47c3bd86dca910b7027c99663b6e9fdf0358
[INFO] running `Command { std: "docker" "start" "-a" "9cf63d70aea83e63c92000eed6ff47c3bd86dca910b7027c99663b6e9fdf0358", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]    Compiling ndarray v0.10.14
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling cpp_synom v0.12.0
[INFO] [stderr]    Compiling cpp_syn v0.12.0
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling cpp_common v0.3.2
[INFO] [stderr]    Compiling cpp_synmap v0.3.0
[INFO] [stderr]    Compiling cpp_build v0.3.2
[INFO] [stderr]    Compiling cpp_macros v0.3.2
[INFO] [stderr]    Compiling cntk v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking cpp v0.3.2
[INFO] [stderr] error: failed to run custom build command for `cntk v0.2.1 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/cntk-f1259b68d15b3f92/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   TARGET = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   OPT_LEVEL = Some("0")
[INFO] [stderr]   TARGET = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   TARGET = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   HOST = Some("x86_64-unknown-linux-gnu")
[INFO] [stderr]   CXXFLAGS_x86_64-unknown-linux-gnu = None
[INFO] [stderr]   CXXFLAGS_x86_64_unknown_linux_gnu = None
[INFO] [stderr]   HOST_CXXFLAGS = None
[INFO] [stderr]   CXXFLAGS = None
[INFO] [stderr]   DEBUG = Some("true")
[INFO] [stderr]   running: "g++-4.8" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-m64" "-I" "/opt/rustwide/workdir" "-std=c++11" "-Wall" "-Wextra" "-o" "/opt/rustwide/target/debug/build/cntk-0d6b323e761baf18/out/rust_cpp/cpp_closures.o" "-c" "/opt/rustwide/target/debug/build/cntk-0d6b323e761baf18/out/rust_cpp/cpp_closures.cpp"
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/gcc-0.3.55/src/lib.rs:1672:5:
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   Internal error occurred: Failed to find tool. Is `g++-4.8` installed?
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55accf71fb56 - std::backtrace_rs::backtrace::libunwind::trace::h261606ad26a499c1
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stderr]      1:     0x55accf71fb56 - std::backtrace_rs::backtrace::trace_unsynchronized::hd183f0625477fb28
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55accf71fb56 - std::sys_common::backtrace::_print_fmt::hd7f8fef21b4eda67
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stderr]      3:     0x55accf71fb56 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h623d9b51f2f453f1
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55accf745920 - core::fmt::rt::Argument::fmt::h9f417ac76a86f368
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x55accf745920 - core::fmt::write::hc9b6faf4ac2aeff7
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/fmt/mod.rs:1120:17
[INFO] [stderr]      6:     0x55accf71cf0f - std::io::Write::write_fmt::hfead1eee52c2e65e
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/io/mod.rs:1810:15
[INFO] [stderr]      7:     0x55accf71f934 - std::sys_common::backtrace::_print::hd5d66399c7df88a2
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      8:     0x55accf71f934 - std::sys_common::backtrace::print::he81ed2da642d37e5
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      9:     0x55accf721217 - std::panicking::default_hook::{{closure}}::h85773f4fa117163d
[INFO] [stderr]     10:     0x55accf720f79 - std::panicking::default_hook::h6a1694a91d09b278
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:292:9
[INFO] [stderr]     11:     0x55accf7216a8 - std::panicking::rust_panic_with_hook::h0a7ad96e90f7145b
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:779:13
[INFO] [stderr]     12:     0x55accf721582 - std::panicking::begin_panic_handler::{{closure}}::h7919090525c6485e
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:657:13
[INFO] [stderr]     13:     0x55accf720056 - std::sys_common::backtrace::__rust_end_short_backtrace::hf3289479464f7dfe
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stderr]     14:     0x55accf7212e0 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:645:5
[INFO] [stderr]     15:     0x55accf565925 - core::panicking::panic_fmt::hcc9f77c5c132af55
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/panicking.rs:72:14
[INFO] [stderr]     16:     0x55accf58a1a1 - gcc::fail::hdce2ffb5d0d08dc1
[INFO] [stderr]     17:     0x55accf57d55f - gcc::Build::compile::h2d4bc5fb0a447454
[INFO] [stderr]     18:     0x55accf56aa59 - cpp_build::Config::build::h8d2a1ba05730515f
[INFO] [stderr]     19:     0x55accf56ac13 - build_script_build::main::h66541c7fd6623b58
[INFO] [stderr]     20:     0x55accf566763 - core::ops::function::FnOnce::call_once::hf5ef69eb10714a35
[INFO] [stderr]     21:     0x55accf566486 - std::sys_common::backtrace::__rust_begin_short_backtrace::h6218feb5e78974b9
[INFO] [stderr]     22:     0x55accf566549 - std::rt::lang_start::{{closure}}::hbfac2e5ea964d5ca
[INFO] [stderr]     23:     0x55accf718ce1 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h4eb4c5e1620f29b0
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     24:     0x55accf718ce1 - std::panicking::try::do_call::h73fd26535faffcdf
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:552:40
[INFO] [stderr]     25:     0x55accf718ce1 - std::panicking::try::h77ff1d98f0fb9f39
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:516:19
[INFO] [stderr]     26:     0x55accf718ce1 - std::panic::catch_unwind::hab3caf2448b95e37
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panic.rs:142:14
[INFO] [stderr]     27:     0x55accf718ce1 - std::rt::lang_start_internal::{{closure}}::h8086711f9c783f78
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55accf718ce1 - std::panicking::try::do_call::hf920d4dc291cd6ca
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:552:40
[INFO] [stderr]     29:     0x55accf718ce1 - std::panicking::try::h2b806ccc0a85db74
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panicking.rs:516:19
[INFO] [stderr]     30:     0x55accf718ce1 - std::panic::catch_unwind::h038489539c507df2
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/panic.rs:142:14
[INFO] [stderr]     31:     0x55accf718ce1 - std::rt::lang_start_internal::h28503b88912e8a5c
[INFO] [stderr]                                  at /rustc/0e09125c6c3c2fd70d7de961bcf0e51575235fad/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55accf566527 - std::rt::lang_start::he3b851459e59bef6
[INFO] [stderr]     33:     0x55accf56ac85 - main
[INFO] [stderr]     34:     0x7fb5a7f18d90 - <unknown>
[INFO] [stderr]     35:     0x7fb5a7f18e40 - __libc_start_main
[INFO] [stderr]     36:     0x55accf566145 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "9cf63d70aea83e63c92000eed6ff47c3bd86dca910b7027c99663b6e9fdf0358", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cf63d70aea83e63c92000eed6ff47c3bd86dca910b7027c99663b6e9fdf0358", kill_on_drop: false }`
[INFO] [stdout] 9cf63d70aea83e63c92000eed6ff47c3bd86dca910b7027c99663b6e9fdf0358
