[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#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvroland%2Fmfnf-export" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vroland/mfnf-export on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "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-1/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" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2f109511a910bad4a7c8127434b5c3458b66d2bfeca494f5a42ad26f059fd26
[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" "d2f109511a910bad4a7c8127434b5c3458b66d2bfeca494f5a42ad26f059fd26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2f109511a910bad4a7c8127434b5c3458b66d2bfeca494f5a42ad26f059fd26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2f109511a910bad4a7c8127434b5c3458b66d2bfeca494f5a42ad26f059fd26", kill_on_drop: false }`
[INFO] [stdout] d2f109511a910bad4a7c8127434b5c3458b66d2bfeca494f5a42ad26f059fd26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8919177c0b05c1fe5caa8f9abe126f053a148cb3807e3c6219a524182067bc72
[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" "8919177c0b05c1fe5caa8f9abe126f053a148cb3807e3c6219a524182067bc72", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.26
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking dtoa v0.4.3
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]     Checking safemem v0.3.0
[INFO] [stderr]    Compiling serde v1.0.85
[INFO] [stderr]    Compiling peg v0.5.7
[INFO] [stderr]     Checking yaml-rust v0.4.2
[INFO] [stderr]     Checking colored v1.7.0
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking serde_json v1.0.37
[INFO] [stderr]     Checking serde_yaml v0.8.8
[INFO] [stderr]    Compiling serde_yaml v0.7.5
[INFO] [stderr]    Compiling serde_derive v1.0.85
[INFO] [stderr]    Compiling structopt-derive v0.2.14
[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/vroland/mediawiki-parser-utils#67c63573)
[INFO] [stderr]    Compiling mwparser_utils_derive v0.1.0 (https://github.com/serlo/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/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/core/src/mem/mod.rs:663:9
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55a9d2815260 - std::backtrace_rs::backtrace::libunwind::trace::h9d49145f95eb5894
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x55a9d2815260 - std::backtrace_rs::backtrace::trace_unsynchronized::hab1d020365bb6864
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55a9d2815260 - std::sys_common::backtrace::_print_fmt::h7659588431e304bd
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55a9d2815260 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h09f4a9e3befae3c7
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x55a9d28328ac - core::fmt::write::hf3fdfde304b9a088
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/core/src/fmt/mod.rs:1092:17
[INFO] [stderr]      5:     0x55a9d28123d2 - std::io::Write::write_fmt::h1cb850689c7116f0
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/io/mod.rs:1568:15
[INFO] [stderr]      6:     0x55a9d2816f95 - std::sys_common::backtrace::_print::hdbccd5aa093ba544
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x55a9d2816f95 - std::sys_common::backtrace::print::hc639c4f320222558
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x55a9d2816f95 - std::panicking::default_hook::{{closure}}::hdb012dd7a485bb5d
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x55a9d2816a43 - std::panicking::default_hook::h75facbce77b6ba91
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x55a9d2817731 - std::panicking::rust_panic_with_hook::hbcaa5de2cb5e22d5
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panicking.rs:591:17
[INFO] [stderr]     11:     0x55a9d2817247 - std::panicking::begin_panic_handler::{{closure}}::h4ee6cde415c8f62d
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panicking.rs:495:13
[INFO] [stderr]     12:     0x55a9d281571c - std::sys_common::backtrace::__rust_end_short_backtrace::h895319f2d3f611c0
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x55a9d28171d9 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panicking.rs:493:5
[INFO] [stderr]     14:     0x55a9d2831081 - core::panicking::panic_fmt::h0123abb763a6e96f
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/core/src/panicking.rs:92:14
[INFO] [stderr]     15:     0x55a9d2830fcd - core::panicking::panic::hdf1b6c818ad7c6ad
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/core/src/panicking.rs:50:5
[INFO] [stderr]     16:     0x55a9d277afce - core::mem::uninitialized::h490142470b8c3b13
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/core/src/mem/mod.rs:663:9
[INFO] [stderr]     17:     0x55a9d277afce - linked_hash_map::LinkedHashMap<K,V,S>::ensure_guard_node::h770f5139aa8a8b5c
[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:     0x55a9d277b207 - linked_hash_map::LinkedHashMap<K,V,S>::insert::h363efa458402e931
[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:     0x55a9d26ec8bd - <serde_yaml::ser::SerializeStruct as serde::ser::SerializeStruct>::serialize_field::hb9744a4e5db84423
[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:     0x55a9d272fad4 - <serde::private::ser::TaggedSerializer<S> as serde::ser::Serializer>::serialize_struct::hab0197a7170dfbdb
[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:     0x55a9d26b7a61 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Document::<impl serde::ser::Serialize for build_script_build::ast::Document>::serialize::h59b9ff7c16506e31
[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:     0x55a9d272ec58 - serde::private::ser::serialize_tagged_newtype::he073836d853ea779
[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:     0x55a9d26bb282 - build_script_build::ast::_IMPL_SERIALIZE_FOR_Element::<impl serde::ser::Serialize for build_script_build::ast::Element>::serialize::he0cc9376074aad63
[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:     0x55a9d2694418 - serde::ser::impls::<impl serde::ser::Serialize for &T>::serialize::hea907caff610299f
[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:     0x55a9d26e8eea - serde_yaml::ser::to_yaml::h5a62de88593923e8
[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:     0x55a9d26e932c - serde_yaml::ser::to_writer::h9e0a2e0eb325c682
[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:     0x55a9d26e8c82 - serde_yaml::ser::to_vec::h13ee0f464df9227c
[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:     0x55a9d26e913c - serde_yaml::ser::to_string::h96c3a9cd849636fe
[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:     0x55a9d272fe03 - build_script_build::Test::write_code::h191cef8a6083cd35
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mediawiki_parser-0.4.2/build.rs:68:13
[INFO] [stderr]     30:     0x55a9d2730694 - 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:     0x55a9d273085d - 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:     0x55a9d2729f2b - core::ops::function::FnOnce::call_once::h74a803bb8c940926
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     33:     0x55a9d271749e - std::sys_common::backtrace::__rust_begin_short_backtrace::hd2b211b7f8ea64f4
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     34:     0x55a9d27175e1 - std::rt::lang_start::{{closure}}::he4625457c5997f6f
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/rt.rs:66:18
[INFO] [stderr]     35:     0x55a9d2817b4a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h31ee16c075ae2d62
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     36:     0x55a9d2817b4a - std::panicking::try::do_call::h3993344bf97066b6
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panicking.rs:379:40
[INFO] [stderr]     37:     0x55a9d2817b4a - std::panicking::try::h09e523df7c9c2d28
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panicking.rs:343:19
[INFO] [stderr]     38:     0x55a9d2817b4a - std::panic::catch_unwind::h9d4ddb10ebb815ff
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/panic.rs:431:14
[INFO] [stderr]     39:     0x55a9d2817b4a - std::rt::lang_start_internal::hc92e27a69d75de2a
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/rt.rs:51:25
[INFO] [stderr]     40:     0x55a9d27175b7 - std::rt::lang_start::h2788094658a96c67
[INFO] [stderr]                                  at /rustc/8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8/library/std/src/rt.rs:65:5
[INFO] [stderr]     41:     0x55a9d2731efa - main
[INFO] [stderr]     42:     0x7f2fcff1c0b3 - __libc_start_main
[INFO] [stderr]     43:     0x55a9d26900ae - _start
[INFO] [stderr]     44:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "8919177c0b05c1fe5caa8f9abe126f053a148cb3807e3c6219a524182067bc72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8919177c0b05c1fe5caa8f9abe126f053a148cb3807e3c6219a524182067bc72", kill_on_drop: false }`
[INFO] [stdout] 8919177c0b05c1fe5caa8f9abe126f053a148cb3807e3c6219a524182067bc72