[INFO] fetching crate vcontrol 0.3.4...
[INFO] testing vcontrol-0.3.4 against 1.49.0 for beta-1.50-1
[INFO] extracting crate vcontrol 0.3.4 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate vcontrol 0.3.4 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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-14/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" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5082e08be335423467ddf334497f30f35208244db09821ac6f51fb5f53bbce4a
[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" "5082e08be335423467ddf334497f30f35208244db09821ac6f51fb5f53bbce4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5082e08be335423467ddf334497f30f35208244db09821ac6f51fb5f53bbce4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5082e08be335423467ddf334497f30f35208244db09821ac6f51fb5f53bbce4a", kill_on_drop: false }`
[INFO] [stdout] 5082e08be335423467ddf334497f30f35208244db09821ac6f51fb5f53bbce4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0f1b1a53a1450d8c2f462f8f8b64cd1c6c23556b91113208f59da1dd10dfb76
[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" "a0f1b1a53a1450d8c2f462f8f8b64cd1c6c23556b91113208f59da1dd10dfb76", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling dtoa v0.4.5
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling yaml-rust v0.4.3
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling serial-core v0.4.0
[INFO] [stderr]    Compiling ioctl-rs v0.1.6
[INFO] [stderr]    Compiling termios v0.2.2
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling serial-unix v0.4.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling serial v0.4.0
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling serde_yaml v0.8.11
[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-1ddf28f40bf09caf/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/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x560a1b31ce00 - std::backtrace_rs::backtrace::libunwind::trace::h04d12fdcddff82aa
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/../../backtrace/src/backtrace/libunwind.rs:100:5
[INFO] [stderr]      1:     0x560a1b31ce00 - std::backtrace_rs::backtrace::trace_unsynchronized::h1459b974b6fbe5e1
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x560a1b31ce00 - std::sys_common::backtrace::_print_fmt::h9b8396a669123d95
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x560a1b31ce00 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::he009dcaaa75eed60
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x560a1b33c5ec - core::fmt::write::h77b4746b0dea1dd3
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x560a1b31ada2 - std::io::Write::write_fmt::heb7e50902e98831c
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/io/mod.rs:1518:15
[INFO] [stderr]      6:     0x560a1b31ef65 - std::sys_common::backtrace::_print::h2d880c9e69a21be9
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x560a1b31ef65 - std::sys_common::backtrace::print::h5f02b1bb49f36879
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x560a1b31ef65 - std::panicking::default_hook::{{closure}}::h658e288a7a809b29
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x560a1b31ec08 - std::panicking::default_hook::hb52d73f0da9a4bb8
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:227:9
[INFO] [stderr]     10:     0x560a1b31f6a1 - std::panicking::rust_panic_with_hook::hfe7e1c684e3e6462
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:593:17
[INFO] [stderr]     11:     0x560a1b31f1b7 - std::panicking::begin_panic_handler::{{closure}}::h42939e004b32765c
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x560a1b31d2bc - std::sys_common::backtrace::__rust_end_short_backtrace::h9d2070f7bf9fd56c
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x560a1b31f149 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:495:5
[INFO] [stderr]     14:     0x560a1b33af51 - core::panicking::panic_fmt::ha0bb065d9a260792
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x560a1b33ae9d - core::panicking::panic::h339b30ca166fd852
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x560a1b2b5b83 - core::mem::uninitialized::ha6f91a186957b372
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]     17:     0x560a1b2b5b83 - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::he7a84dab0ff0c33f
[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:     0x560a1b2b5e27 - linked_hash_map::LinkedHashMap<K,V,S>::insert::h45a1598ec97247f8
[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:     0x560a1b286b97 - serde_yaml::mapping::Mapping::insert::hc07af062ec562192
[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:     0x560a1b253cf0 - <serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::ValueVisitor as serde::de::Visitor>::visit_map::h4a0a85a4fe222d51
[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:     0x560a1b25be6c - serde_yaml::de::Deserializer::visit_mapping::{{closure}}::hae508ad9d0800a8f
[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:     0x560a1b25c72a - serde_yaml::de::Deserializer::recursion_check::h83ff2e915e90d5c5
[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:     0x560a1b25bb71 - serde_yaml::de::Deserializer::visit_mapping::h583d73b3ecdf2a0b
[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:     0x560a1b25fb2e - <&mut serde_yaml::de::Deserializer as serde::de::Deserializer>::deserialize_any::hf27c682c454de71c
[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:     0x560a1b284fb5 - serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::h2ceeae082a9e3845
[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:     0x560a1b278d95 - <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize::hb94d14f8d3e18536
[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:     0x560a1b25f4be - <serde_yaml::de::MapAccess as serde::de::MapAccess>::next_value_seed::h5cfdee0649a36118
[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:     0x560a1b25edbb - serde::de::MapAccess::next_entry_seed::hf2a359e5ee2a53e7
[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:     0x560a1b25ebc6 - serde::de::MapAccess::next_entry::h88acde0321f83dd4
[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:     0x560a1b25eb69 - <&mut A as serde::de::MapAccess>::next_entry::hd6fe3b4df5a424b7
[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:     0x560a1b253a8c - <serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::ValueVisitor as serde::de::Visitor>::visit_map::h4a0a85a4fe222d51
[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:     0x560a1b25be6c - serde_yaml::de::Deserializer::visit_mapping::{{closure}}::hae508ad9d0800a8f
[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:     0x560a1b25c72a - serde_yaml::de::Deserializer::recursion_check::h83ff2e915e90d5c5
[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:     0x560a1b25bb71 - serde_yaml::de::Deserializer::visit_mapping::h583d73b3ecdf2a0b
[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:     0x560a1b25fb2e - <&mut serde_yaml::de::Deserializer as serde::de::Deserializer>::deserialize_any::hf27c682c454de71c
[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:     0x560a1b284fb5 - serde_yaml::value::de::<impl serde::de::Deserialize for serde_yaml::value::Value>::deserialize::h2ceeae082a9e3845
[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:     0x560a1b278d95 - <core::marker::PhantomData<T> as serde::de::DeserializeSeed>::deserialize::hb94d14f8d3e18536
[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:     0x560a1b25d1c4 - serde_yaml::de::from_str_seed::he4476c3690446317
[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:     0x560a1b25eb3b - serde_yaml::de::from_str::h8455629aa493f600
[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:     0x560a1b26637c - build_script_build::main::h10cc3be10fd6d8a9
[INFO] [stderr]                                  at /opt/rustwide/workdir/build.rs:28:88
[INFO] [stderr]     41:     0x560a1b28e06b - core::ops::function::FnOnce::call_once::h4b4cb8d47f6ab80b
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     42:     0x560a1b28cdde - std::sys_common::backtrace::__rust_begin_short_backtrace::ha449e28c927587a3
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     43:     0x560a1b274f61 - std::rt::lang_start::{{closure}}::h34ef1b139ff594e2
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:66:18
[INFO] [stderr]     44:     0x560a1b31fac7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h57e2a071d427b24c
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     45:     0x560a1b31fac7 - std::panicking::try::do_call::h81cbbe0c3b30a28e
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:381:40
[INFO] [stderr]     46:     0x560a1b31fac7 - std::panicking::try::hbeeb95b4e1f0a876
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:345:19
[INFO] [stderr]     47:     0x560a1b31fac7 - std::panic::catch_unwind::h59c48ccb40a0bf20
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panic.rs:396:14
[INFO] [stderr]     48:     0x560a1b31fac7 - std::rt::lang_start_internal::ha53ab63f88fee728
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:51:25
[INFO] [stderr]     49:     0x560a1b274f37 - std::rt::lang_start::hde6e52f6446a08c8
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:65:5
[INFO] [stderr]     50:     0x560a1b26d16a - main
[INFO] [stderr]     51:     0x7f68aa42b0b3 - __libc_start_main
[INFO] [stderr]     52:     0x560a1b2380ae - _start
[INFO] [stderr]     53:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "a0f1b1a53a1450d8c2f462f8f8b64cd1c6c23556b91113208f59da1dd10dfb76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0f1b1a53a1450d8c2f462f8f8b64cd1c6c23556b91113208f59da1dd10dfb76", kill_on_drop: false }`
[INFO] [stdout] a0f1b1a53a1450d8c2f462f8f8b64cd1c6c23556b91113208f59da1dd10dfb76