[INFO] cloning repository https://github.com/vroland/mfnf-sitemap-parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vroland/mfnf-sitemap-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-sitemap-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-sitemap-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d8002c6d9d7e1addda2bee3ea9514d19271ce6d
[INFO] testing vroland/mfnf-sitemap-parser against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-sitemap-parser" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vroland/mfnf-sitemap-parser 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 git repo https://github.com/vroland/mfnf-sitemap-parser
[INFO] finished tweaking git repo https://github.com/vroland/mfnf-sitemap-parser
[INFO] tweaked toml for git repo https://github.com/vroland/mfnf-sitemap-parser written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/vroland/mfnf-sitemap-parser 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-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aff249ecab39f31983062c36decd5c9a8552fe1a03a22742df9865aef4995eb7
[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" "aff249ecab39f31983062c36decd5c9a8552fe1a03a22742df9865aef4995eb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aff249ecab39f31983062c36decd5c9a8552fe1a03a22742df9865aef4995eb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aff249ecab39f31983062c36decd5c9a8552fe1a03a22742df9865aef4995eb7", kill_on_drop: false }`
[INFO] [stdout] aff249ecab39f31983062c36decd5c9a8552fe1a03a22742df9865aef4995eb7
[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=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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3fc0e6310de622354ad3b759df274ded1f71a701209f7a9ffd0cd8a3fba7f11f
[INFO] running `Command { std: "docker" "start" "-a" "3fc0e6310de622354ad3b759df274ded1f71a701209f7a9ffd0cd8a3fba7f11f", kill_on_drop: false }`
[INFO] [stderr]    Compiling yaml-rust v0.4.2
[INFO] [stderr]    Compiling peg v0.5.7
[INFO] [stderr]    Compiling syn v0.15.12
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling colored v1.6.1
[INFO] [stderr]    Compiling serde_yaml v0.7.5
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling structopt-derive v0.2.12
[INFO] [stderr]    Compiling structopt v0.2.12
[INFO] [stderr]    Compiling mediawiki_parser v0.4.0
[INFO] [stderr]    Compiling mwparser_utils_derive v0.1.0 (https://github.com/vroland/mediawiki-parser-utils#d6705314)
[INFO] [stderr] error: failed to run custom build command for `mediawiki_parser v0.4.0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/mediawiki_parser-47cfe677d6c63e0d/build-script-build` (exit code: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:rerun-if-changed=src/grammar.rustpeg
[INFO] [stderr]   cargo:rerun-if-changed=doc/docs.yml
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at 'attempted to leave type `linked_hash_map::Node<yaml::Yaml, yaml::Yaml>` uninitialized, which is invalid', /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x557e1b2349b0 - 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:     0x557e1b2349b0 - 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:     0x557e1b2349b0 - std::sys_common::backtrace::_print_fmt::h9b8396a669123d95
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x557e1b2349b0 - <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:     0x557e1b25444c - core::fmt::write::h77b4746b0dea1dd3
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x557e1b231da2 - std::io::Write::write_fmt::heb7e50902e98831c
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/io/mod.rs:1518:15
[INFO] [stderr]      6:     0x557e1b236b65 - std::sys_common::backtrace::_print::h2d880c9e69a21be9
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x557e1b236b65 - std::sys_common::backtrace::print::h5f02b1bb49f36879
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x557e1b236b65 - std::panicking::default_hook::{{closure}}::h658e288a7a809b29
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x557e1b236808 - std::panicking::default_hook::hb52d73f0da9a4bb8
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:227:9
[INFO] [stderr]     10:     0x557e1b2372a1 - std::panicking::rust_panic_with_hook::hfe7e1c684e3e6462
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:593:17
[INFO] [stderr]     11:     0x557e1b236db7 - std::panicking::begin_panic_handler::{{closure}}::h42939e004b32765c
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:497:13
[INFO] [stderr]     12:     0x557e1b234e6c - 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:     0x557e1b236d49 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:495:5
[INFO] [stderr]     14:     0x557e1b252db1 - core::panicking::panic_fmt::ha0bb065d9a260792
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x557e1b252cfd - core::panicking::panic::h339b30ca166fd852
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x557e1b18ce63 - core::mem::uninitialized::hba3f8e8f78bd7be2
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]     17:     0x557e1b18ce63 - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::h9ae6f4f0bac80e9c
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.5.1/src/lib.rs:174:52
[INFO] [stderr]     18:     0x557e1b18d0b7 - linked_hash_map::LinkedHashMap<K,V,S>::insert::hadbf5de57a8509bd
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/linked-hash-map-0.5.1/src/lib.rs:304:9
[INFO] [stderr]     19:     0x557e1b1065bd - <serde_yaml::ser::SerializeStruct as serde::ser::SerializeStruct>::serialize_field::h365af7762128388b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.7.5/src/ser.rs:344:9
[INFO] [stderr]     20:     0x557e1b154da4 - <serde::private::ser::TaggedSerializer<S> as serde::ser::Serializer>::serialize_struct::h31e2da9d184a032d
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.80/src/private/ser.rs:302:14
[INFO] [stderr]     21:     0x557e1b0b4171 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Document::<impl serde::ser::Serialize for build_script_build::ast::Document>::serialize::hf7a848b5c947be81
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.0/src/ast.rs:36:17
[INFO] [stderr]     22:     0x557e1b153a38 - serde::private::ser::serialize_tagged_newtype::h881cff70b1d079c1
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.80/src/private/ser.rs:37:5
[INFO] [stderr]     23:     0x557e1b0b2752 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Element::<impl serde::ser::Serialize for build_script_build::ast::Element>::serialize::h904a594fc16e5529
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.0/src/ast.rs:12:17
[INFO] [stderr]     24:     0x557e1b0af0d8 - serde::ser::impls::<impl serde::ser::Serialize for &T>::serialize::hc99ce3a85f7b4e02
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.80/src/ser/impls.rs:373:17
[INFO] [stderr]     25:     0x557e1b103dca - serde_yaml::ser::to_yaml::habc926b767642bb1
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.7.5/src/ser.rs:434:5
[INFO] [stderr]     26:     0x557e1b10410c - serde_yaml::ser::to_writer::h1101531e7e055dbd
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.7.5/src/ser.rs:379:15
[INFO] [stderr]     27:     0x557e1b103a53 - serde_yaml::ser::to_vec::h4579e8aaea5ae4e8
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.7.5/src/ser.rs:396:5
[INFO] [stderr]     28:     0x557e1b103f1c - serde_yaml::ser::to_string::h0d9da38e0c29b524
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.7.5/src/ser.rs:408:26
[INFO] [stderr]     29:     0x557e1b140e13 - build_script_build::Test::write_code::he6e0d0d3867fa1b2
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.0/build.rs:70:13
[INFO] [stderr]     30:     0x557e1b1416be - build_script_build::generate_tests::h168037ae54152aa6
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.0/build.rs:104:9
[INFO] [stderr]     31:     0x557e1b14187a - build_script_build::main::he442f1a675436805
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.0/build.rs:110:5
[INFO] [stderr]     32:     0x557e1b14d8db - core::ops::function::FnOnce::call_once::h36eb7890b0066abf
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     33:     0x557e1b14d41e - std::sys_common::backtrace::__rust_begin_short_backtrace::h03aa8e27f05d6a74
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     34:     0x557e1b108491 - std::rt::lang_start::{{closure}}::hb779f86ac47a55a6
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:66:18
[INFO] [stderr]     35:     0x557e1b2376c7 - 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]     36:     0x557e1b2376c7 - std::panicking::try::do_call::h81cbbe0c3b30a28e
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:381:40
[INFO] [stderr]     37:     0x557e1b2376c7 - std::panicking::try::hbeeb95b4e1f0a876
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panicking.rs:345:19
[INFO] [stderr]     38:     0x557e1b2376c7 - std::panic::catch_unwind::h59c48ccb40a0bf20
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/panic.rs:396:14
[INFO] [stderr]     39:     0x557e1b2376c7 - std::rt::lang_start_internal::ha53ab63f88fee728
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:51:25
[INFO] [stderr]     40:     0x557e1b108467 - std::rt::lang_start::ha177649ca251cc1a
[INFO] [stderr]                                  at /rustc/e1884a8e3c3e813aada8254edfa120e85bf5ffca/library/std/src/rt.rs:65:5
[INFO] [stderr]     41:     0x557e1b142fda - main
[INFO] [stderr]     42:     0x7f2bec38d0b3 - __libc_start_main
[INFO] [stderr]     43:     0x557e1b0ab0ae - _start
[INFO] [stderr]     44:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "3fc0e6310de622354ad3b759df274ded1f71a701209f7a9ffd0cd8a3fba7f11f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fc0e6310de622354ad3b759df274ded1f71a701209f7a9ffd0cd8a3fba7f11f", kill_on_drop: false }`
[INFO] [stdout] 3fc0e6310de622354ad3b759df274ded1f71a701209f7a9ffd0cd8a3fba7f11f