[INFO] updating cached repository https://github.com/vegapit/tchtut
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] f0d6e880f1729a2d4a5a8bb80005d007dbf27982
[INFO] testing vegapit/tchtut against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvegapit%2Ftchtut" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vegapit/tchtut on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/vegapit/tchtut
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/vegapit/tchtut
[INFO] tweaked toml for git repo https://github.com/vegapit/tchtut written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/LaurentMazare/tch-rs`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c6dce4c587b36591ca7af00bd431e699cf4de91a786d72f20a27c1a677f154cd
[INFO] running `"docker" "start" "-a" "c6dce4c587b36591ca7af00bd431e699cf4de91a786d72f20a27c1a677f154cd"`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling smallvec v1.4.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]    Compiling palette v0.5.0
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling unicode-width v0.1.7
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[INFO] [stderr]    Compiling float-ord v0.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.3.6
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling matrixmultiply v0.2.3
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling gif v0.10.3
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.36
[INFO] [stderr]    Compiling curl-sys v0.4.30+curl-7.69.1
[INFO] [stderr]    Compiling bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling termios v0.3.2
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling memmap v0.7.0
[INFO] [stderr]    Compiling terminal_size v0.1.11
[INFO] [stderr]    Compiling clicolors-control v1.0.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling stb_truetype v0.3.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.18
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling parking_lot v0.10.2
[INFO] [stderr]    Compiling euclid v0.20.10
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling ordered-float v1.0.2
[INFO] [stderr]    Compiling number_prefix v0.2.8
[INFO] [stderr]    Compiling png v0.15.3
[INFO] [stderr]    Compiling freetype v0.4.1
[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling rusttype v0.8.3
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling lyon_geom v0.14.1
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling zip v0.5.5
[INFO] [stderr]    Compiling image v0.22.5
[INFO] [stderr]    Compiling servo-fontconfig v0.4.0
[INFO] [stderr]    Compiling console v0.10.1
[INFO] [stderr]    Compiling lyon_path v0.14.0
[INFO] [stderr]    Compiling font-kit v0.4.0
[INFO] [stderr]    Compiling indicatif v0.11.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling curl v0.4.28
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling palette_derive v0.5.0
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling torch-sys v0.1.7 (https://github.com/LaurentMazare/tch-rs#0fd0dd14)
[INFO] [stderr] error: failed to run custom build command for `torch-sys v0.1.7 (https://github.com/LaurentMazare/tch-rs#0fd0dd14)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/torch-sys-2d96a3bec4e0e58e/build-script-build` (exit code: 101)
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { description: "Couldn\'t resolve host name", code: 6, extra: None }
[INFO] [stderr] 
[INFO] [stderr]    0: failure::backtrace::internal::InternalBacktrace::new
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.7/src/backtrace/internal.rs:46
[INFO] [stderr]    1: failure::backtrace::Backtrace::new
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.7/src/backtrace/mod.rs:121
[INFO] [stderr]    2: <failure::error::error_impl::ErrorImpl as core::convert::From<F>>::from
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.7/src/error/error_impl.rs:19
[INFO] [stderr]    3: <failure::error::Error as core::convert::From<F>>::from
[INFO] [stderr]              at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/failure-0.1.7/src/error/mod.rs:36
[INFO] [stderr]    4: build_script_build::download
[INFO] [stderr]              at build.rs:30
[INFO] [stderr]    5: build_script_build::prepare_libtorch_dir
[INFO] [stderr]              at build.rs:117
[INFO] [stderr]    6: build_script_build::main
[INFO] [stderr]              at build.rs:182
[INFO] [stderr]    7: std::rt::lang_start::{{closure}}
[INFO] [stderr]              at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/rt.rs:67
[INFO] [stderr]    8: std::rt::lang_start_internal::{{closure}}
[INFO] [stderr]              at src/libstd/rt.rs:52
[INFO] [stderr]       std::panicking::try::do_call
[INFO] [stderr]              at src/libstd/panicking.rs:331
[INFO] [stderr]       std::panicking::try
[INFO] [stderr]              at src/libstd/panicking.rs:274
[INFO] [stderr]       std::panic::catch_unwind
[INFO] [stderr]              at src/libstd/panic.rs:394
[INFO] [stderr]       std::rt::lang_start_internal
[INFO] [stderr]              at src/libstd/rt.rs:51
[INFO] [stderr]    9: std::rt::lang_start
[INFO] [stderr]              at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/rt.rs:67
[INFO] [stderr]   10: main
[INFO] [stderr]   11: __libc_start_main
[INFO] [stderr]   12: _start
[INFO] [stderr] ', /opt/rustwide/cargo-home/git/checkouts/tch-rs-b9d1710db79374bb/0fd0dd1/torch-sys/build.rs:117:13
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x56095a8743a4 - backtrace::backtrace::libunwind::trace::hbb4ce8c04526962e
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
[INFO] [stderr]    1:     0x56095a8743a4 - backtrace::backtrace::trace_unsynchronized::h79251c088e7be038
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x56095a8743a4 - std::sys_common::backtrace::_print_fmt::h6b0ea30a9223acae
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:78
[INFO] [stderr]    3:     0x56095a8743a4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h4d51ef07ce58e54b
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]    4:     0x56095a89be9c - core::fmt::write::he16b9c1345d8565e
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1069
[INFO] [stderr]    5:     0x56095a8700a3 - std::io::Write::write_fmt::h35d873b9ce1f02a8
[INFO] [stderr]                                at src/libstd/io/mod.rs:1504
[INFO] [stderr]    6:     0x56095a8771c5 - std::sys_common::backtrace::_print::h9288fa7d9f6629cb
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]    7:     0x56095a8771c5 - std::sys_common::backtrace::print::h82e606e62781d8af
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x56095a8771c5 - std::panicking::default_hook::{{closure}}::h1fe350ecbf7604e4
[INFO] [stderr]                                at src/libstd/panicking.rs:198
[INFO] [stderr]    9:     0x56095a876f02 - std::panicking::default_hook::h1b8b42953fdc841d
[INFO] [stderr]                                at src/libstd/panicking.rs:218
[INFO] [stderr]   10:     0x56095a877822 - std::panicking::rust_panic_with_hook::he73826f4bb75a21e
[INFO] [stderr]                                at src/libstd/panicking.rs:511
[INFO] [stderr]   11:     0x56095a87740b - rust_begin_unwind
[INFO] [stderr]                                at src/libstd/panicking.rs:419
[INFO] [stderr]   12:     0x56095a89b281 - core::panicking::panic_fmt::hc8f9a0b2af5fb585
[INFO] [stderr]                                at src/libcore/panicking.rs:111
[INFO] [stderr]   13:     0x56095a89b0a3 - core::option::expect_none_failed::ha34d57526cca3063
[INFO] [stderr]                                at src/libcore/option.rs:1268
[INFO] [stderr]   14:     0x56095a6eaf33 - core::result::Result<T,E>::unwrap::he70c4a04c514c0fd
[INFO] [stderr]                                at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libcore/result.rs:1005
[INFO] [stderr]   15:     0x56095a6e5fcb - build_script_build::prepare_libtorch_dir::h8cce13c5e94c19cb
[INFO] [stderr]                                at /opt/rustwide/cargo-home/git/checkouts/tch-rs-b9d1710db79374bb/0fd0dd1/torch-sys/build.rs:117
[INFO] [stderr]   16:     0x56095a6e70d4 - build_script_build::main::hc5eaa4f9d8260880
[INFO] [stderr]                                at /opt/rustwide/cargo-home/git/checkouts/tch-rs-b9d1710db79374bb/0fd0dd1/torch-sys/build.rs:182
[INFO] [stderr]   17:     0x56095a6f5fcb - std::rt::lang_start::{{closure}}::he0283c765472fbf1
[INFO] [stderr]                                at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/rt.rs:67
[INFO] [stderr]   18:     0x56095a877d38 - std::rt::lang_start_internal::{{closure}}::h985f9ad0467016f1
[INFO] [stderr]                                at src/libstd/rt.rs:52
[INFO] [stderr]   19:     0x56095a877d38 - std::panicking::try::do_call::hbcbbc645883681bb
[INFO] [stderr]                                at src/libstd/panicking.rs:331
[INFO] [stderr]   20:     0x56095a877d38 - std::panicking::try::h250f86dc8ee6d054
[INFO] [stderr]                                at src/libstd/panicking.rs:274
[INFO] [stderr]   21:     0x56095a877d38 - std::panic::catch_unwind::h58d26ced09bde6c3
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   22:     0x56095a877d38 - std::rt::lang_start_internal::h7de51dd9f16af454
[INFO] [stderr]                                at src/libstd/rt.rs:51
[INFO] [stderr]   23:     0x56095a6f5fa7 - std::rt::lang_start::h206c58de7fa44afb
[INFO] [stderr]                                at /rustc/28742a1146f10a4f09369baad027a464acb7a766/src/libstd/rt.rs:67
[INFO] [stderr]   24:     0x56095a6e78ea - main
[INFO] [stderr]   25:     0x7fa7fc458b97 - __libc_start_main
[INFO] [stderr]   26:     0x56095a6e068a - _start
[INFO] [stderr]   27:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c6dce4c587b36591ca7af00bd431e699cf4de91a786d72f20a27c1a677f154cd"`
[INFO] running `"docker" "rm" "-f" "c6dce4c587b36591ca7af00bd431e699cf4de91a786d72f20a27c1a677f154cd"`
[INFO] [stdout] c6dce4c587b36591ca7af00bd431e699cf4de91a786d72f20a27c1a677f154cd