[INFO] fetching crate vcontrol 0.3.4...
[INFO] testing vcontrol-0.3.4 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate vcontrol 0.3.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate vcontrol 0.3.4 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "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-2/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-2021-01-01" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9714de1bf695510bc27dec8b6ab7c5ed9cbca9660f2dbde9f976003039ffc6f2
[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" "9714de1bf695510bc27dec8b6ab7c5ed9cbca9660f2dbde9f976003039ffc6f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9714de1bf695510bc27dec8b6ab7c5ed9cbca9660f2dbde9f976003039ffc6f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9714de1bf695510bc27dec8b6ab7c5ed9cbca9660f2dbde9f976003039ffc6f2", kill_on_drop: false }`
[INFO] [stdout] 9714de1bf695510bc27dec8b6ab7c5ed9cbca9660f2dbde9f976003039ffc6f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20fb506a49934ebe0b75f45416dde8f44d5967e99d8acb2b8245cca2c614b49e
[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" "20fb506a49934ebe0b75f45416dde8f44d5967e99d8acb2b8245cca2c614b49e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling siphasher v0.3.1
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling termios v0.2.2
[INFO] [stderr]    Compiling ioctl-rs v0.1.6
[INFO] [stderr]    Compiling serial-core v0.4.0
[INFO] [stderr]    Compiling serde_yaml v0.8.11
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling serial-unix v0.4.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling serial v0.4.0
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[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 thiserror-impl v1.0.11
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling thiserror v1.0.11
[INFO] [stderr]    Compiling yaml-merge-keys v0.4.0
[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-f3ddc6fa291aea33/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/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55735fd9e0f7 - std::backtrace_rs::backtrace::libunwind::trace::hcd6e187547b8deec
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55735fd9e0f7 - std::backtrace_rs::backtrace::trace_unsynchronized::hde10036eb783fbc7
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55735fd9e0f7 - std::sys_common::backtrace::_print_fmt::h63987b8f86dfc82a
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55735fd9e0f7 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hc33f3ac4cc9c4196
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55735fdbb1fc - core::fmt::write::hfdcdeb08fb2b3afa
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x55735fd9bf82 - std::io::Write::write_fmt::h83a843778fa2a815
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/io/mod.rs:1519:15
[INFO] [stderr]      6:     0x55735fd9fe35 - std::sys_common::backtrace::_print::hf179508b01f66878
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55735fd9fe35 - std::sys_common::backtrace::print::ha97d11adb39266a6
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55735fd9fe35 - std::panicking::default_hook::{{closure}}::h8da9985a98bd1582
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55735fd9f98a - std::panicking::default_hook::hbc0ee792993c2ef2
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55735fda05d1 - std::panicking::rust_panic_with_hook::h9fb9cda33a10f084
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x55735fda00e7 - std::panicking::begin_panic_handler::{{closure}}::hf3e83396e085962e
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:495:13
[INFO] [stderr]     12:     0x55735fd9e5bc - std::sys_common::backtrace::__rust_end_short_backtrace::hac151ac4c1e3252d
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55735fda0079 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x55735fdb9bb1 - core::panicking::panic_fmt::hf6d8a92b065b8f97
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55735fdb9afd - core::panicking::panic::h95b17729da7179c5
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x55735fd33513 - core::mem::uninitialized::h4c7227b4741b4ba4
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]     17:     0x55735fd33513 - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::h8c30865ebe564a9b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.5.2/src/lib.rs:174:52
[INFO] [stderr]     18:     0x55735fd337b7 - linked_hash_map::LinkedHashMap<K,V,S>::insert::h29207c7666ba67ce
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.5.2/src/lib.rs:304:9
[INFO] [stderr]     19:     0x55735fcf2f17 - serde_yaml::mapping::Mapping::insert::h28c4ecadd00ca79f
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/mapping.rs:53:9
[INFO] [stderr]     20:     0x55735fccce64 - <serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::ValueVisitor as serde::de::Visitor>::visit_map::h0d42ba6dd240a721
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:107:21
[INFO] [stderr]     21:     0x55735fcd4e8c - serde_yaml::de::Deserializer::visit_mapping::{{closure}}::h11bf71942861373c
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:175:25
[INFO] [stderr]     22:     0x55735fcd558f - serde_yaml::de::Deserializer::recursion_check::h1270952f06bd659b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:239:22
[INFO] [stderr]     23:     0x55735fcd4b71 - serde_yaml::de::Deserializer::visit_mapping::hbc45d0665ee7069a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:169:28
[INFO] [stderr]     24:     0x55735fcd8c0e - <&mut serde_yaml::de::Deserializer as serde::de::Deserializer>::deserialize_any::h7276a422e359b1c7
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:657:36
[INFO] [stderr]     25:     0x55735fcff905 - serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::h6e0c03162ba96472
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:114:9
[INFO] [stderr]     26:     0x55735fcf1da5 - <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize::ha6dad32cf3644cad
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:786:9
[INFO] [stderr]     27:     0x55735fcd859e - <serde_yaml::de::MapAccess as serde::de::MapAccess>::next_value_seed::h9348a6a64f2165b7
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:365:9
[INFO] [stderr]     28:     0x55735fcd7e8b - serde::de::MapAccess::next_entry_seed::h8a01fe0fe9aace83
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:1813:34
[INFO] [stderr]     29:     0x55735fcd7c96 - serde::de::MapAccess::next_entry::h75fb3796698e530a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:1861:9
[INFO] [stderr]     30:     0x55735fcd7c39 - <&mut A as serde::de::MapAccess>::next_entry::h7142c23f89f2a99e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:1912:9
[INFO] [stderr]     31:     0x55735fcccbfc - <serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::ValueVisitor as serde::de::Visitor>::visit_map::h0d42ba6dd240a721
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:106:48
[INFO] [stderr]     32:     0x55735fcd4e8c - serde_yaml::de::Deserializer::visit_mapping::{{closure}}::h11bf71942861373c
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:175:25
[INFO] [stderr]     33:     0x55735fcd558f - serde_yaml::de::Deserializer::recursion_check::h1270952f06bd659b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:239:22
[INFO] [stderr]     34:     0x55735fcd4b71 - serde_yaml::de::Deserializer::visit_mapping::hbc45d0665ee7069a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:169:28
[INFO] [stderr]     35:     0x55735fcd8c0e - <&mut serde_yaml::de::Deserializer as serde::de::Deserializer>::deserialize_any::h7276a422e359b1c7
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:657:36
[INFO] [stderr]     36:     0x55735fcff905 - serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::h6e0c03162ba96472
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/value/de.rs:114:9
[INFO] [stderr]     37:     0x55735fcf1da5 - <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize::ha6dad32cf3644cad
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.104/src/de/mod.rs:786:9
[INFO] [stderr]     38:     0x55735fcd61ec - serde_yaml::de::from_str_seed::h989177d76f83ff95
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:1042:17
[INFO] [stderr]     39:     0x55735fcd7c0b - serde_yaml::de::from_str::he8ca2af6fd9e19dd
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.11/src/de.rs:1012:5
[INFO] [stderr]     40:     0x55735fce634c - build_script_build::main::h593e8bd03d5f2024
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:28:88
[INFO] [stderr]     41:     0x55735fcf34fb - core::ops::function::FnOnce::call_once::ha6bc3b3b318f5f0e
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     42:     0x55735fd081be - std::sys_common::backtrace::__rust_begin_short_backtrace::h11b63c5f5f5df56f
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     43:     0x55735fcee5c1 - std::rt::lang_start::{{closure}}::h08fd6f3241a3b2ac
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/rt.rs:66:18
[INFO] [stderr]     44:     0x55735fda09f7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hb5ab992a536e3d7c
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     45:     0x55735fda09f7 - std::panicking::try::do_call::h1bda883686bc1816
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:379:40
[INFO] [stderr]     46:     0x55735fda09f7 - std::panicking::try::ha7167c079f243e71
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panicking.rs:343:19
[INFO] [stderr]     47:     0x55735fda09f7 - std::panic::catch_unwind::he11c3de53f0b5853
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/panic.rs:396:14
[INFO] [stderr]     48:     0x55735fda09f7 - std::rt::lang_start_internal::h45c3666b51d25060
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/rt.rs:51:25
[INFO] [stderr]     49:     0x55735fcee597 - std::rt::lang_start::h63df1fa67a6febe3
[INFO] [stderr]                                  at /rustc/25b3db3aa752d9d4633c983c9d4bf5e48f9baff1/library/std/src/rt.rs:65:5
[INFO] [stderr]     50:     0x55735fced25a - main
[INFO] [stderr]     51:     0x7fa1119d50b3 - __libc_start_main
[INFO] [stderr]     52:     0x55735fcb10ae - _start
[INFO] [stderr]     53:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "20fb506a49934ebe0b75f45416dde8f44d5967e99d8acb2b8245cca2c614b49e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20fb506a49934ebe0b75f45416dde8f44d5967e99d8acb2b8245cca2c614b49e", kill_on_drop: false }`
[INFO] [stdout] 20fb506a49934ebe0b75f45416dde8f44d5967e99d8acb2b8245cca2c614b49e