[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 try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-export" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vroland/mfnf-export on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-14/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" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/serlo/mfnf-sitemap-parser`
[INFO] [stderr]     Updating git repository `https://github.com/serlo/mfnf-template-spec`
[INFO] [stderr]     Updating git repository `https://github.com/serlo/mediawiki-parser-utils`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mediawiki_parser v0.4.2
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 751d16015b7382d59fcd064777e331bfd9042f3738edb8d0e0abb245f207952b
[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" "751d16015b7382d59fcd064777e331bfd9042f3738edb8d0e0abb245f207952b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "751d16015b7382d59fcd064777e331bfd9042f3738edb8d0e0abb245f207952b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "751d16015b7382d59fcd064777e331bfd9042f3738edb8d0e0abb245f207952b", kill_on_drop: false }`
[INFO] [stdout] 751d16015b7382d59fcd064777e331bfd9042f3738edb8d0e0abb245f207952b
[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=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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 85a45f74d99ff5e44b85005a6a7372de4fbb17230b6fd0f3a6c70a4a572a54c3
[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" "85a45f74d99ff5e44b85005a6a7372de4fbb17230b6fd0f3a6c70a4a572a54c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.26
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling peg v0.5.7
[INFO] [stderr]     Checking colored v1.7.0
[INFO] [stderr]    Compiling serde v1.0.85
[INFO] [stderr]     Checking serde_json v1.0.37
[INFO] [stderr]     Checking serde_yaml v0.8.8
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling syn v0.14.9
[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-d77d15f2a726b650/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/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/core/src/mem/mod.rs:671:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x5623fee3b9e0 - std::backtrace_rs::backtrace::libunwind::trace::hb4de9797f80b7b8c
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x5623fee3b9e0 - std::backtrace_rs::backtrace::trace_unsynchronized::h59566d0bd20efff7
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x5623fee3b9e0 - std::sys_common::backtrace::_print_fmt::hcfa5ce6be50275d4
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x5623fee3b9e0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd8c307a38b9bab04
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x5623fee5945c - core::fmt::write::h3868db8542c90941
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/core/src/fmt/mod.rs:1096:17
[INFO] [stderr]      5:     0x5623fee38af2 - std::io::Write::write_fmt::hab90295d5a0f197d
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/io/mod.rs:1568:15
[INFO] [stderr]      6:     0x5623fee3d765 - std::sys_common::backtrace::_print::h19224910b8700cf1
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x5623fee3d765 - std::sys_common::backtrace::print::h25dedfa68c5fb84a
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x5623fee3d765 - std::panicking::default_hook::{{closure}}::h12c5765653a72a42
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x5623fee3d213 - std::panicking::default_hook::he65cee71c4209f0c
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x5623fee3df01 - std::panicking::rust_panic_with_hook::h01a674d863fe0d8a
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x5623fee3da17 - std::panicking::begin_panic_handler::{{closure}}::h9b9fecf185178864
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panicking.rs:495:13
[INFO] [stderr]     12:     0x5623fee3be7c - std::sys_common::backtrace::__rust_end_short_backtrace::h57be46a42dc7f24b
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x5623fee3d9a9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x5623fee57e21 - core::panicking::panic_fmt::h20225113c4a2f8fd
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x5623fee57d6d - core::panicking::panic::h35b77276aa4b0c12
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x5623feda074e - core::mem::uninitialized::h3cbda8ce766cc190
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/core/src/mem/mod.rs:671:9
[INFO] [stderr]     17:     0x5623feda074e - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::h7b83440e32c9da31
[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:     0x5623feda0987 - linked_hash_map::LinkedHashMap<K,V,S>::insert::hecd0f37a234f5c6a
[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:     0x5623fed135ed - <serde_yaml::ser::SerializeStruct as serde::ser::SerializeStruct>::serialize_field::h676836626db723eb
[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:     0x5623fed572f4 - <serde::private::ser::TaggedSerializer<S> as serde::ser::Serializer>::serialize_struct::h066fb08eb957648a
[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:     0x5623fecdea21 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Document::<impl serde::ser::Serialize for build_script_build::ast::Document>::serialize::h0dcc9e2090b249ad
[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:     0x5623fed56398 - serde::private::ser::serialize_tagged_newtype::h1829c6f3cab27616
[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:     0x5623fece2242 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Element::<impl serde::ser::Serialize for build_script_build::ast::Element>::serialize::he832a5a70eaa6c9d
[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:     0x5623fecbb2e8 - serde::ser::impls::<impl serde::ser::Serialize for &T>::serialize::h1c3b51ec168df65c
[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:     0x5623fed105fa - serde_yaml::ser::to_yaml::h7cf8f9bd0cbd72fd
[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:     0x5623fed10a7c - serde_yaml::ser::to_writer::h3cac6a43aba96b5a
[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:     0x5623fed103d2 - serde_yaml::ser::to_vec::h725c46d7d26814b6
[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:     0x5623fed1088c - serde_yaml::ser::to_string::hf0aab2b6fd38a885
[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:     0x5623fed57623 - build_script_build::Test::write_code::hd3b1bbb4d0e2822d
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/build.rs:68:13
[INFO] [stderr]     30:     0x5623fed57eb4 - build_script_build::generate_tests::h3e345c601be563aa
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/build.rs:102:9
[INFO] [stderr]     31:     0x5623fed5807d - build_script_build::main::h0d95bae3d3e10b26
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/build.rs:108:5
[INFO] [stderr]     32:     0x5623fed49f5b - core::ops::function::FnOnce::call_once::hb3aef6b425eb327c
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     33:     0x5623fed5552e - std::sys_common::backtrace::__rust_begin_short_backtrace::h969b5dbc4fcf4e71
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     34:     0x5623fed0ce71 - std::rt::lang_start::{{closure}}::heb928ab78840493b
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/rt.rs:66:18
[INFO] [stderr]     35:     0x5623fee3e327 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h2c4fd7d4128112a8
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     36:     0x5623fee3e327 - std::panicking::try::do_call::h41fb7dbbbe7bece6
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panicking.rs:379:40
[INFO] [stderr]     37:     0x5623fee3e327 - std::panicking::try::hd38008ccba72bce1
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panicking.rs:343:19
[INFO] [stderr]     38:     0x5623fee3e327 - std::panic::catch_unwind::h057e765cd60f2d13
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/panic.rs:431:14
[INFO] [stderr]     39:     0x5623fee3e327 - std::rt::lang_start_internal::hdb9d0b9d2cdcda8b
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/rt.rs:51:25
[INFO] [stderr]     40:     0x5623fed0ce47 - std::rt::lang_start::h8eab28671b718529
[INFO] [stderr]                                  at /rustc/15a786332e2f0dd343b226ab6bb8ec028a350f73/library/std/src/rt.rs:65:5
[INFO] [stderr]     41:     0x5623fed5971a - main
[INFO] [stderr]     42:     0x7fcb1664b0b3 - __libc_start_main
[INFO] [stderr]     43:     0x5623fecb70ae - _start
[INFO] [stderr]     44:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "85a45f74d99ff5e44b85005a6a7372de4fbb17230b6fd0f3a6c70a4a572a54c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85a45f74d99ff5e44b85005a6a7372de4fbb17230b6fd0f3a6c70a4a572a54c3", kill_on_drop: false }`
[INFO] [stdout] 85a45f74d99ff5e44b85005a6a7372de4fbb17230b6fd0f3a6c70a4a572a54c3