[INFO] cloning repository https://github.com/vroland/mfnf-export
[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-export" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-export", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-export'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cb12bb9efddb477c78c8de74c67555525bf15d4
[INFO] checking vroland/mfnf-export against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-export" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vroland/mfnf-export on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vroland/mfnf-export
[INFO] finished tweaking git repo https://github.com/vroland/mfnf-export
[INFO] tweaked toml for git repo https://github.com/vroland/mfnf-export written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/vroland/mfnf-export already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2de77846569c70ec36595d807e6fb7f4612bdfae3ee942f8df559b6a321ca3ce
[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" "2de77846569c70ec36595d807e6fb7f4612bdfae3ee942f8df559b6a321ca3ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2de77846569c70ec36595d807e6fb7f4612bdfae3ee942f8df559b6a321ca3ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2de77846569c70ec36595d807e6fb7f4612bdfae3ee942f8df559b6a321ca3ce", kill_on_drop: false }`
[INFO] [stdout] 2de77846569c70ec36595d807e6fb7f4612bdfae3ee942f8df559b6a321ca3ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "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] d30530658ba943066d38540fc6e44e5044034b64bf147eddc56fd12731f8303d
[INFO] running `Command { std: "docker" "start" "-a" "d30530658ba943066d38540fc6e44e5044034b64bf147eddc56fd12731f8303d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.26
[INFO] [stderr]    Compiling serde v1.0.85
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]     Checking safemem v0.3.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking colored v1.7.0
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking serde_yaml v0.8.8
[INFO] [stderr]     Checking serde_json v1.0.37
[INFO] [stderr]    Compiling serde_derive v1.0.85
[INFO] [stderr]    Compiling structopt-derive v0.2.14
[INFO] [stderr]    Compiling serde_yaml v0.7.5
[INFO] [stderr]     Checking structopt v0.2.14
[INFO] [stderr]    Compiling mediawiki_parser v0.4.2
[INFO] [stderr]    Compiling mwparser_utils_derive v0.1.0 (https://github.com/serlo/mediawiki-parser-utils#67c63573)
[INFO] [stderr]    Compiling mwparser_utils_derive v0.1.0 (https://github.com/vroland/mediawiki-parser-utils#67c63573)
[INFO] [stderr] error: failed to run custom build command for `mediawiki_parser v0.4.2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/mediawiki_parser-b12cc2131afd8156/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/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5612e746ca30 - std::backtrace_rs::backtrace::libunwind::trace::h448c56741b6011d3
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/../../backtrace/src/backtrace/libunwind.rs:100:5
[INFO] [stderr]      1:     0x5612e746ca30 - std::backtrace_rs::backtrace::trace_unsynchronized::h2d26397c5720fdbb
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x5612e746ca30 - std::sys_common::backtrace::_print_fmt::h720a2f61f75b9f58
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x5612e746ca30 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h8d62bbfda6d5c836
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x5612e748ca3c - core::fmt::write::h1857a60b204f1b6a
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/core/src/fmt/mod.rs:1078:17
[INFO] [stderr]      5:     0x5612e7469bd2 - std::io::Write::write_fmt::h16a9fe7680ac245c
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/io/mod.rs:1519:15
[INFO] [stderr]      6:     0x5612e746ed45 - std::sys_common::backtrace::_print::h9ba51a6db618de7d
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x5612e746ed45 - std::sys_common::backtrace::print::h5f20e41c85e91716
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x5612e746ed45 - std::panicking::default_hook::{{closure}}::h5b7294ca19e8edab
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x5612e746e89a - std::panicking::default_hook::hb3948d1f74b6ff4c
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x5612e746f4e1 - std::panicking::rust_panic_with_hook::h55d23fef0ad751bc
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x5612e746eff7 - std::panicking::begin_panic_handler::{{closure}}::h56ae74c6dea6e141
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panicking.rs:495:13
[INFO] [stderr]     12:     0x5612e746cecc - std::sys_common::backtrace::__rust_end_short_backtrace::h3c4721f56689fae4
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x5612e746ef89 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x5612e748b3a1 - core::panicking::panic_fmt::hb15d6f55e8472f62
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x5612e748b2ed - core::panicking::panic::h5d1c61fed2502a5f
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x5612e73c6e03 - core::mem::uninitialized::hbe51351f3fac33a6
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/core/src/mem/mod.rs:659:9
[INFO] [stderr]     17:     0x5612e73c6e03 - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::hf6bca79cc1ffaafb
[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:     0x5612e73c7057 - linked_hash_map::LinkedHashMap<K,V,S>::insert::h39ce3396f688eb46
[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:     0x5612e73462fd - <serde_yaml::ser::SerializeStruct as serde::ser::SerializeStruct>::serialize_field::ha451033c2de31dbb
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.8/src/ser.rs:371:9
[INFO] [stderr]     20:     0x5612e738aed4 - <serde::private::ser::TaggedSerializer<S> as serde::ser::Serializer>::serialize_struct::h57544f4b062b37ad
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.85/src/private/ser.rs:294:14
[INFO] [stderr]     21:     0x5612e7311a61 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Document::<impl serde::ser::Serialize for build_script_build::ast::Document>::serialize::hc6c865f13084c15b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/src/ast.rs:37:17
[INFO] [stderr]     22:     0x5612e738aa98 - serde::private::ser::serialize_tagged_newtype::h8d828673f4ca8149
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.85/src/private/ser.rs:29:5
[INFO] [stderr]     23:     0x5612e7315282 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Element::<impl serde::ser::Serialize for build_script_build::ast::Element>::serialize::hc14aac3816d2eb5e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/src/ast.rs:13:17
[INFO] [stderr]     24:     0x5612e72ee418 - serde::ser::impls::<impl serde::ser::Serialize for &T>::serialize::hc720fc620388252c
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.85/src/ser/impls.rs:365:17
[INFO] [stderr]     25:     0x5612e7343b8a - serde_yaml::ser::to_yaml::he63de7edffdf3606
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.8/src/ser.rs:460:5
[INFO] [stderr]     26:     0x5612e7343e4c - serde_yaml::ser::to_writer::h61db906ff1035319
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.8/src/ser.rs:406:15
[INFO] [stderr]     27:     0x5612e7343793 - serde_yaml::ser::to_vec::h578633e2ea90ca4a
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.8/src/ser.rs:423:5
[INFO] [stderr]     28:     0x5612e7343c5c - serde_yaml::ser::to_string::hdd9ac60fbcad6336
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_yaml-0.8.8/src/ser.rs:435:26
[INFO] [stderr]     29:     0x5612e738b1d3 - build_script_build::Test::write_code::hf1d8b0cbb21ef73b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/build.rs:68:13
[INFO] [stderr]     30:     0x5612e738ba7e - build_script_build::generate_tests::h4cd5354ca04cad71
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/build.rs:102:9
[INFO] [stderr]     31:     0x5612e738bc3a - build_script_build::main::h3d157233fb76410e
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/build.rs:108:5
[INFO] [stderr]     32:     0x5612e73788cb - core::ops::function::FnOnce::call_once::h541acd287a9354ba
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     33:     0x5612e7377f4e - std::sys_common::backtrace::__rust_begin_short_backtrace::h9a720867534a8625
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     34:     0x5612e73419e1 - std::rt::lang_start::{{closure}}::h5f14ff01591c810e
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/rt.rs:66:18
[INFO] [stderr]     35:     0x5612e746f907 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h3f3ba5d1e0ce8d49
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     36:     0x5612e746f907 - std::panicking::try::do_call::hd7a374fc87b951e7
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panicking.rs:379:40
[INFO] [stderr]     37:     0x5612e746f907 - std::panicking::try::h068087b173f80a49
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panicking.rs:343:19
[INFO] [stderr]     38:     0x5612e746f907 - std::panic::catch_unwind::h1f8259807e825279
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/panic.rs:396:14
[INFO] [stderr]     39:     0x5612e746f907 - std::rt::lang_start_internal::h8ff82302dd620b52
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/rt.rs:51:25
[INFO] [stderr]     40:     0x5612e73419b7 - std::rt::lang_start::h2209cac620f438f2
[INFO] [stderr]                                  at /rustc/c919f490bbcd2b29b74016101f7ec71aaa24bdbb/library/std/src/rt.rs:65:5
[INFO] [stderr]     41:     0x5612e738d2da - main
[INFO] [stderr]     42:     0x7ff8c5f430b3 - __libc_start_main
[INFO] [stderr]     43:     0x5612e72ea0ae - _start
[INFO] [stderr]     44:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "d30530658ba943066d38540fc6e44e5044034b64bf147eddc56fd12731f8303d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d30530658ba943066d38540fc6e44e5044034b64bf147eddc56fd12731f8303d", kill_on_drop: false }`
[INFO] [stdout] d30530658ba943066d38540fc6e44e5044034b64bf147eddc56fd12731f8303d