[INFO] fetching crate tch-serde 0.2.0...
[INFO] checking tch-serde-0.2.0 against beta for pr-78714
[INFO] extracting crate tch-serde 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tch-serde 0.2.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tch-serde 0.2.0
[INFO] finished tweaking crates.io crate tch-serde 0.2.0
[INFO] tweaked toml for crates.io crate tch-serde 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate tch-serde 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83153bc388cfd4fa9ddf08a05bc41b5564b5d909fe706ffcb15b113d64a3e33c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "83153bc388cfd4fa9ddf08a05bc41b5564b5d909fe706ffcb15b113d64a3e33c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83153bc388cfd4fa9ddf08a05bc41b5564b5d909fe706ffcb15b113d64a3e33c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83153bc388cfd4fa9ddf08a05bc41b5564b5d909fe706ffcb15b113d64a3e33c", kill_on_drop: false }`
[INFO] [stdout] 83153bc388cfd4fa9ddf08a05bc41b5564b5d909fe706ffcb15b113d64a3e33c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 47d6850544c808be057ce79f6b24709ae831dc937f091568b1f7a22fe9cd168d
[INFO] running `Command { std: "docker" "start" "-a" "47d6850544c808be057ce79f6b24709ae831dc937f091568b1f7a22fe9cd168d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling curl v0.4.33
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling curl-sys v0.4.36+curl-7.71.1
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling miniz_oxide v0.4.2
[INFO] [stderr]     Checking bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]     Checking flate2 v1.0.14
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling socket2 v0.3.15
[INFO] [stderr]    Compiling backtrace v0.3.50
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]     Checking zip v0.5.8
[INFO] [stderr]    Compiling torch-sys v0.2.0
[INFO] [stderr]     Checking serde v1.0.116
[INFO] [stderr] error: failed to run custom build command for `torch-sys v0.2.0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/torch-sys-7124b5ab35bcde16/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-env-changed=TORCH_CUDA_VERSION
[INFO] [stderr]   cargo:rerun-if-env-changed=LIBTORCH
[INFO] [stderr] 
[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-0.1.8/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-0.1.8/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-0.1.8/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-0.1.8/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:122
[INFO] [stderr]      6: build_script_build::main
[INFO] [stderr]                at build.rs:194
[INFO] [stderr]      7: core::ops::function::FnOnce::call_once
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/ops/function.rs:227
[INFO] [stderr]      8: std::sys_common::backtrace::__rust_begin_short_backtrace
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]      9: std::rt::lang_start::{{closure}}
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/rt.rs:66
[INFO] [stderr]     10: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/ops/function.rs:259
[INFO] [stderr]         std::panicking::try::do_call
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:381
[INFO] [stderr]         std::panicking::try
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:345
[INFO] [stderr]         std::panic::catch_unwind
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panic.rs:382
[INFO] [stderr]         std::rt::lang_start_internal
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/rt.rs:51
[INFO] [stderr]     11: std::rt::lang_start
[INFO] [stderr]                at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/rt.rs:65
[INFO] [stderr]     12: main
[INFO] [stderr]     13: __libc_start_main
[INFO] [stderr]     14: _start
[INFO] [stderr]   ', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/torch-sys-0.2.0/build.rs:122:48
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x564865875530 - std::backtrace_rs::backtrace::libunwind::trace::h7cf3ca97bd83fbab
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x564865875530 - std::backtrace_rs::backtrace::trace_unsynchronized::h5a69c674b2d9ea5c
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x564865875530 - std::sys_common::backtrace::_print_fmt::hdf72478dfcb50678
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x564865875530 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1e0bdbb35e83deca
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x56486589640c - core::fmt::write::he67f9b17bcb7ee73
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x564865870f72 - std::io::Write::write_fmt::hac97d5cb5753e2ec
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/io/mod.rs:1516
[INFO] [stderr]      6:     0x564865877ecd - std::sys_common::backtrace::_print::haa20918e28a126c5
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x564865877ecd - std::sys_common::backtrace::print::h49e772a4873d9076
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x564865877ecd - std::panicking::default_hook::{{closure}}::hb218b305d15e3f11
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x564865877b78 - std::panicking::default_hook::h63997b7b949e1ce0
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x5648658785b1 - std::panicking::rust_panic_with_hook::hb54f09ccadf64bd3
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x564865878159 - std::panicking::begin_panic_handler::{{closure}}::h8b43445b254eeb30
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x5648658759bc - std::sys_common::backtrace::__rust_end_short_backtrace::hacd691450edfeae0
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x564865878119 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x564865895721 - core::panicking::panic_fmt::h5b17d4a0e853d0f5
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/panicking.rs:85
[INFO] [stderr]     15:     0x564865895543 - core::option::expect_none_failed::hd08bf36cae411fff
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/option.rs:1234
[INFO] [stderr]     16:     0x5648656681b3 - core::result::Result<T,E>::unwrap::hbc58fe8946bef9af
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/result.rs:973
[INFO] [stderr]     17:     0x564865653d33 - build_script_build::prepare_libtorch_dir::h03c9c1b64d4f0f35
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/torch-sys-0.2.0/build.rs:122
[INFO] [stderr]     18:     0x564865654fa4 - build_script_build::main::h980deb8ad38779b0
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/torch-sys-0.2.0/build.rs:194
[INFO] [stderr]     19:     0x5648656645eb - core::ops::function::FnOnce::call_once::hb86a634a217afe49
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/ops/function.rs:227
[INFO] [stderr]     20:     0x564865666dde - std::sys_common::backtrace::__rust_begin_short_backtrace::h06613c4424da07db
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     21:     0x564865659701 - std::rt::lang_start::{{closure}}::h6020cdfea32b436f
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/rt.rs:66
[INFO] [stderr]     22:     0x564865878ac7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h908982dfc31b926f
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/core/src/ops/function.rs:259
[INFO] [stderr]     23:     0x564865878ac7 - std::panicking::try::do_call::h92777899503b7584
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:381
[INFO] [stderr]     24:     0x564865878ac7 - std::panicking::try::h8815656b2b76e792
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panicking.rs:345
[INFO] [stderr]     25:     0x564865878ac7 - std::panic::catch_unwind::h112ab81228f50b46
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/panic.rs:382
[INFO] [stderr]     26:     0x564865878ac7 - std::rt::lang_start_internal::h1772a706c7575c24
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/rt.rs:51
[INFO] [stderr]     27:     0x5648656596d7 - std::rt::lang_start::h98048f4a3c455689
[INFO] [stderr]                                  at /rustc/1219014599fd873fcb640b675d8a662150c74e40/library/std/src/rt.rs:65
[INFO] [stderr]     28:     0x5648656557aa - main
[INFO] [stderr]     29:     0x7f9628eac0b3 - __libc_start_main
[INFO] [stderr]     30:     0x56486564e0ee - _start
[INFO] [stderr]     31:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "47d6850544c808be057ce79f6b24709ae831dc937f091568b1f7a22fe9cd168d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47d6850544c808be057ce79f6b24709ae831dc937f091568b1f7a22fe9cd168d", kill_on_drop: false }`
[INFO] [stdout] 47d6850544c808be057ce79f6b24709ae831dc937f091568b1f7a22fe9cd168d