[INFO] cloning repository https://github.com/Bobo1239/discord-mpd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bobo1239/discord-mpd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBobo1239%2Fdiscord-mpd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBobo1239%2Fdiscord-mpd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d2f83da3f2e10e91acc67dd03fbcd008ab9096bc
[INFO] documenting Bobo1239/discord-mpd against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBobo1239%2Fdiscord-mpd" "/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/Bobo1239/discord-mpd on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Bobo1239/discord-mpd
[INFO] finished tweaking git repo https://github.com/Bobo1239/discord-mpd
[INFO] tweaked toml for git repo https://github.com/Bobo1239/discord-mpd written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Bobo1239/discord-mpd already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d946b4338a5f10c1ec2110c28be60236a1f3b8ab6565b383d502f8964a85f4a5
[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" "d946b4338a5f10c1ec2110c28be60236a1f3b8ab6565b383d502f8964a85f4a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d946b4338a5f10c1ec2110c28be60236a1f3b8ab6565b383d502f8964a85f4a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d946b4338a5f10c1ec2110c28be60236a1f3b8ab6565b383d502f8964a85f4a5", kill_on_drop: false }`
[INFO] [stdout] d946b4338a5f10c1ec2110c28be60236a1f3b8ab6565b383d502f8964a85f4a5
[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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec1bafa966ae50f9a7e2fe9546f05939ea3c7282d0222fce9bcd47bdb0d362c0
[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" "ec1bafa966ae50f9a7e2fe9546f05939ea3c7282d0222fce9bcd47bdb0d362c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]     Checking untrusted v0.7.0
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rustversion v1.0.2
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling yansi v0.5.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.13
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling rle-decode-fast v1.0.1
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling state v0.4.1
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]     Checking podio v0.1.6
[INFO] [stderr]    Compiling encoding_rs v0.8.22
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking dtoa v0.4.5
[INFO] [stderr]     Checking mime v0.3.16
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking hangeul v0.1.0 (https://github.com/zaeleus/hangeul.git#8e234f9a)
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking base16 v0.2.1
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]    Compiling serenity v0.8.0
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking uwl v0.5.1
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling pear_codegen v0.1.2
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling rocket_codegen v0.5.0-dev (https://github.com/SergioBenitez/Rocket.git#d0bfd8a3)
[INFO] [stderr]    Compiling rocket v0.5.0-dev (https://github.com/SergioBenitez/Rocket.git#d0bfd8a3)
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking bit-set v0.5.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking lock_api v0.3.3
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking aho-corasick v0.7.7
[INFO] [stderr] error: failed to run custom build command for `pear_codegen v0.1.2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/pear_codegen-f41f10994fba63ff/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   [1;31mError:[0m [37mPear requires a nightly or dev version of Rust.[0m
[INFO] [stderr]   [37mInstalled version is:[0m [33m1.55.0-beta.3 (2021-07-31)[0m. [37mMinimum required:[0m [33m1.31.0-nightly (2018-10-05)[0m.
[INFO] [stderr]   thread 'main' panicked at 'Aborting compilation due to incompatible compiler.', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.1.2/build.rs:31:13
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x563f0e721be0 - std::backtrace_rs::backtrace::libunwind::trace::hff4d1766e93f64f1
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stderr]      1:     0x563f0e721be0 - std::backtrace_rs::backtrace::trace_unsynchronized::h56bbc8eb78770bcb
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x563f0e721be0 - std::sys_common::backtrace::_print_fmt::h5c8e75464faca780
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x563f0e721be0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h48b88277def8b362
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stderr]      4:     0x563f0e73ebbc - core::fmt::write::h3381b3176fe2b3d3
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/fmt/mod.rs:1115:17
[INFO] [stderr]      5:     0x563f0e71faa5 - std::io::Write::write_fmt::hd42607e5d8e44db0
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/io/mod.rs:1665:15
[INFO] [stderr]      6:     0x563f0e72381b - std::sys_common::backtrace::_print::ha537687d6c17dd0d
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stderr]      7:     0x563f0e72381b - std::sys_common::backtrace::print::h61376ae57d131d72
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stderr]      8:     0x563f0e72381b - std::panicking::default_hook::{{closure}}::h0f7208c0b9644a54
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:208:50
[INFO] [stderr]      9:     0x563f0e7232f1 - std::panicking::default_hook::hdac7fc06578c14ce
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:225:9
[INFO] [stderr]     10:     0x563f0e723ee4 - std::panicking::rust_panic_with_hook::h72b21c283da3d1ef
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:622:17
[INFO] [stderr]     11:     0x563f0e709c34 - std::panicking::begin_panic::{{closure}}::h130bbc7f07efd900
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:542:9
[INFO] [stderr]     12:     0x563f0e709bfc - std::sys_common::backtrace::__rust_end_short_backtrace::hb96da108d4748a63
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stderr]     13:     0x563f0e70709c - std::panicking::begin_panic::h51e8fb14d975285c
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:541:12
[INFO] [stderr]     14:     0x563f0e70a077 - build_script_build::main::hbd6241366ac6658b
[INFO] [stderr]                                  at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.1.2/build.rs:31:13
[INFO] [stderr]     15:     0x563f0e709c03 - core::ops::function::FnOnce::call_once::ha26a9a5af9cbcfc7
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:227:5
[INFO] [stderr]     16:     0x563f0e709c03 - std::sys_common::backtrace::__rust_begin_short_backtrace::h60118f4e824f0da0
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stderr]     17:     0x563f0e709b99 - std::rt::lang_start::{{closure}}::h41757a99eef52477
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/rt.rs:63:18
[INFO] [stderr]     18:     0x563f0e7243ea - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::ha88a7d1a4d24e549
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:259:13
[INFO] [stderr]     19:     0x563f0e7243ea - std::panicking::try::do_call::hd3b1d7740607ccc7
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stderr]     20:     0x563f0e7243ea - std::panicking::try::h0ee8c65ac7461507
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stderr]     21:     0x563f0e7243ea - std::panic::catch_unwind::head47f0de4ccd838
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stderr]     22:     0x563f0e7243ea - std::rt::lang_start_internal::{{closure}}::hbc7de8ec820ac085
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/rt.rs:45:48
[INFO] [stderr]     23:     0x563f0e7243ea - std::panicking::try::do_call::h2609e52e8bad4a7b
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stderr]     24:     0x563f0e7243ea - std::panicking::try::hd0929f0b603e0389
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stderr]     25:     0x563f0e7243ea - std::panic::catch_unwind::h27902b81c3e47571
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stderr]     26:     0x563f0e7243ea - std::rt::lang_start_internal::h3fb2d794dd391e3e
[INFO] [stderr]                                  at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/rt.rs:45:20
[INFO] [stderr]     27:     0x563f0e70a598 - main
[INFO] [stderr]     28:     0x7fc7336ef0b3 - __libc_start_main
[INFO] [stderr]     29:     0x563f0e709ace - _start
[INFO] [stderr]     30:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ec1bafa966ae50f9a7e2fe9546f05939ea3c7282d0222fce9bcd47bdb0d362c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec1bafa966ae50f9a7e2fe9546f05939ea3c7282d0222fce9bcd47bdb0d362c0", kill_on_drop: false }`
[INFO] [stdout] ec1bafa966ae50f9a7e2fe9546f05939ea3c7282d0222fce9bcd47bdb0d362c0
