[INFO] fetching crate vcontrol 0.3.4...
[INFO] documenting vcontrol-0.3.4 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate vcontrol 0.3.4 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate vcontrol 0.3.4 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vcontrol 0.3.4
[INFO] finished tweaking crates.io crate vcontrol 0.3.4
[INFO] tweaked toml for crates.io crate vcontrol 0.3.4 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate vcontrol 0.3.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded yaml-merge-keys v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc242f8644ce38a1d4eb891464fc80e4f5011d2944bade39f6a52dbec13db8bd
[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" "dc242f8644ce38a1d4eb891464fc80e4f5011d2944bade39f6a52dbec13db8bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc242f8644ce38a1d4eb891464fc80e4f5011d2944bade39f6a52dbec13db8bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc242f8644ce38a1d4eb891464fc80e4f5011d2944bade39f6a52dbec13db8bd", kill_on_drop: false }`
[INFO] [stdout] dc242f8644ce38a1d4eb891464fc80e4f5011d2944bade39f6a52dbec13db8bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16b3b8ab3c734cd1d371cdffde3cb8cd0ba737b99f6fe4116f20e6ad8f262df9
[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" "16b3b8ab3c734cd1d371cdffde3cb8cd0ba737b99f6fe4116f20e6ad8f262df9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]     Checking siphasher v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.11
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]    Compiling yaml-rust v0.4.3
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling serde_yaml v0.8.11
[INFO] [stderr]     Checking termios v0.2.2
[INFO] [stderr]     Checking ioctl-rs v0.1.6
[INFO] [stderr]     Checking serial-core v0.4.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking serial-unix v0.4.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking serial v0.4.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling thiserror v1.0.11
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling yaml-merge-keys v0.4.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling vcontrol v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `vcontrol v0.3.4 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/vcontrol-99c1fd4772b0e0a0/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'attempted to leave type `linked_hash_map::Node<value::Value, value::Value>` uninitialized, which is invalid', /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/mem/mod.rs:658:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x555971da7e60 - std::backtrace_rs::backtrace::libunwind::trace::h7cf3ca97bd83fbab
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stderr]      1:     0x555971da7e60 - std::backtrace_rs::backtrace::trace_unsynchronized::h5a69c674b2d9ea5c
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stderr]      2:     0x555971da7e60 - std::sys_common::backtrace::_print_fmt::hdf72478dfcb50678
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:79
[INFO] [stderr]      3:     0x555971da7e60 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1e0bdbb35e83deca
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:58
[INFO] [stderr]      4:     0x555971dc6b4c - core::fmt::write::he67f9b17bcb7ee73
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/fmt/mod.rs:1080
[INFO] [stderr]      5:     0x555971da5ef2 - std::io::Write::write_fmt::hac97d5cb5753e2ec
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/mod.rs:1516
[INFO] [stderr]      6:     0x555971da9f8d - std::sys_common::backtrace::_print::haa20918e28a126c5
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:61
[INFO] [stderr]      7:     0x555971da9f8d - std::sys_common::backtrace::print::h49e772a4873d9076
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:48
[INFO] [stderr]      8:     0x555971da9f8d - std::panicking::default_hook::{{closure}}::hb218b305d15e3f11
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:208
[INFO] [stderr]      9:     0x555971da9c38 - std::panicking::default_hook::h63997b7b949e1ce0
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:227
[INFO] [stderr]     10:     0x555971daa611 - std::panicking::rust_panic_with_hook::hb54f09ccadf64bd3
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:577
[INFO] [stderr]     11:     0x555971daa1b9 - std::panicking::begin_panic_handler::{{closure}}::h8b43445b254eeb30
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:484
[INFO] [stderr]     12:     0x555971da82ec - std::sys_common::backtrace::__rust_end_short_backtrace::hacd691450edfeae0
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:153
[INFO] [stderr]     13:     0x555971daa179 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:483
[INFO] [stderr]     14:     0x555971dc5421 - core::panicking::panic_fmt::h5b17d4a0e853d0f5
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/panicking.rs:85
[INFO] [stderr]     15:     0x555971dc536d - core::panicking::panic::hc6be4d7009fb30ae
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/panicking.rs:50
[INFO] [stderr]     16:     0x555971d400b3 - core::mem::uninitialized::hc8b897b8e1ef69e6
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/mem/mod.rs:658
[INFO] [stderr]     17:     0x555971d400b3 - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::ha0974002b955429f
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.5.2/src/lib.rs:174
[INFO] [stderr]     18:     0x555971d40357 - linked_hash_map::LinkedHashMap<K,V,S>::insert::hc8aaf27b29c039bf
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.5.2/src/lib.rs:304
[INFO] [stderr]     19:     0x555971d05537 - serde_yaml::mapping::Mapping::insert::h237739dcedd89ceb
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/mapping.rs:53
[INFO] [stderr]     20:     0x555971cd92df - <serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::ValueVisitor as serde::de::Visitor>::visit_map::h80606ef1a481de45
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:107
[INFO] [stderr]     21:     0x555971ce4b2c - serde_yaml::de::Deserializer::visit_mapping::{{closure}}::h3e90e30caefeacff
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:175
[INFO] [stderr]     22:     0x555971ce528e - serde_yaml::de::Deserializer::recursion_check::hb69535f008e59f11
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:239
[INFO] [stderr]     23:     0x555971ce4811 - serde_yaml::de::Deserializer::visit_mapping::h342010e5797da836
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:169
[INFO] [stderr]     24:     0x555971ce899b - <&mut serde_yaml::de::Deserializer as serde::de::Deserializer>::deserialize_any::h2fa8793de3ba8442
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:657
[INFO] [stderr]     25:     0x555971d036f5 - serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::hfb8f01766c59c34d
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:114
[INFO] [stderr]     26:     0x555971d01585 - <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize::h47ed71071cd3e95a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:786
[INFO] [stderr]     27:     0x555971ce82ce - <serde_yaml::de::MapAccess as serde::de::MapAccess>::next_value_seed::h7c9cb4f907ca59f8
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:365
[INFO] [stderr]     28:     0x555971ce7b7e - serde::de::MapAccess::next_entry_seed::hd2a96e4e9302f79b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:1813
[INFO] [stderr]     29:     0x555971ce7966 - serde::de::MapAccess::next_entry::hc728c0e9b027fd14
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:1861
[INFO] [stderr]     30:     0x555971ce7909 - <&mut A as serde::de::MapAccess>::next_entry::h423d6c81961aabc9
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:1912
[INFO] [stderr]     31:     0x555971cd905d - <serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::ValueVisitor as serde::de::Visitor>::visit_map::h80606ef1a481de45
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:106
[INFO] [stderr]     32:     0x555971ce4b2c - serde_yaml::de::Deserializer::visit_mapping::{{closure}}::h3e90e30caefeacff
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:175
[INFO] [stderr]     33:     0x555971ce528e - serde_yaml::de::Deserializer::recursion_check::hb69535f008e59f11
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:239
[INFO] [stderr]     34:     0x555971ce4811 - serde_yaml::de::Deserializer::visit_mapping::h342010e5797da836
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:169
[INFO] [stderr]     35:     0x555971ce899b - <&mut serde_yaml::de::Deserializer as serde::de::Deserializer>::deserialize_any::h2fa8793de3ba8442
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:657
[INFO] [stderr]     36:     0x555971d036f5 - serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::hfb8f01766c59c34d
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:114
[INFO] [stderr]     37:     0x555971d01585 - <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize::h47ed71071cd3e95a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:786
[INFO] [stderr]     38:     0x555971ce5f91 - serde_yaml::de::from_str_seed::ha492f3983cba5b67
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:1042
[INFO] [stderr]     39:     0x555971ce78db - serde_yaml::de::from_str::h8531925e5683de8e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:1012
[INFO] [stderr]     40:     0x555971cefcb4 - build_script_build::main::ha708ec8a803b3ce7
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:28
[INFO] [stderr]     41:     0x555971d173ab - core::ops::function::FnOnce::call_once::h9bfe25f3ed1093db
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stderr]     42:     0x555971d15d6e - std::sys_common::backtrace::__rust_begin_short_backtrace::h1c7bc013dcaa0141
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:137
[INFO] [stderr]     43:     0x555971cfe201 - std::rt::lang_start::{{closure}}::hdf86f3930e6deaf0
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/rt.rs:66
[INFO] [stderr]     44:     0x555971daaa37 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h908982dfc31b926f
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:259
[INFO] [stderr]     45:     0x555971daaa37 - std::panicking::try::do_call::h92777899503b7584
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stderr]     46:     0x555971daaa37 - std::panicking::try::h8815656b2b76e792
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stderr]     47:     0x555971daaa37 - std::panic::catch_unwind::h112ab81228f50b46
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stderr]     48:     0x555971daaa37 - std::rt::lang_start_internal::h1772a706c7575c24
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/rt.rs:51
[INFO] [stderr]     49:     0x555971cfe1d7 - std::rt::lang_start::hf33c0b4620725145
[INFO] [stderr]                                  at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/rt.rs:65
[INFO] [stderr]     50:     0x555971cf6c8a - main
[INFO] [stderr]     51:     0x7fa10104c0b3 - __libc_start_main
[INFO] [stderr]     52:     0x555971cc00ae - _start
[INFO] [stderr]     53:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "16b3b8ab3c734cd1d371cdffde3cb8cd0ba737b99f6fe4116f20e6ad8f262df9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16b3b8ab3c734cd1d371cdffde3cb8cd0ba737b99f6fe4116f20e6ad8f262df9", kill_on_drop: false }`
[INFO] [stdout] 16b3b8ab3c734cd1d371cdffde3cb8cd0ba737b99f6fe4116f20e6ad8f262df9