[INFO] cloning repository https://github.com/anchpop/xtr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anchpop/xtr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanchpop%2Fxtr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanchpop%2Fxtr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7824eeecfe397f9dd4cb86609ec6edabeabc1096
[INFO] documenting anchpop/xtr against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanchpop%2Fxtr" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anchpop/xtr on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/anchpop/xtr
[INFO] finished tweaking git repo https://github.com/anchpop/xtr
[INFO] tweaked toml for git repo https://github.com/anchpop/xtr written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/anchpop/xtr already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wgpu-types v0.5.1
[INFO] [stderr]   Downloaded gfx-descriptor v0.1.0
[INFO] [stderr]   Downloaded gfx-backend-empty v0.5.0
[INFO] [stderr]   Downloaded gfx-memory v0.1.3
[INFO] [stderr]   Downloaded d3d12 v0.3.0
[INFO] [stderr]   Downloaded wgpu-native v0.5.0
[INFO] [stderr]   Downloaded wgpu v0.5.0
[INFO] [stderr]   Downloaded gfx-backend-vulkan v0.5.6
[INFO] [stderr]   Downloaded lyon_algorithms v0.15.0
[INFO] [stderr]   Downloaded lyon_tessellation v0.15.8
[INFO] [stderr]   Downloaded ash v0.30.0
[INFO] [stderr]   Downloaded lyon v0.15.8
[INFO] [stderr]   Downloaded gfx-backend-dx11 v0.5.1
[INFO] [stderr]   Downloaded metal v0.18.0
[INFO] [stderr]   Downloaded wgpu-core v0.5.5
[INFO] [stderr]   Downloaded gfx-backend-metal v0.5.2
[INFO] [stderr]   Downloaded gfx-hal v0.5.0
[INFO] [stderr]   Downloaded gfx-backend-dx12 v0.5.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cff1e4ccaac2ebe41d7c7beb9f743b2ccdc1cc2e8d25d73bdac18201c4f26cbb
[INFO] running `Command { std: "docker" "start" "-a" "cff1e4ccaac2ebe41d7c7beb9f743b2ccdc1cc2e8d25d73bdac18201c4f26cbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cff1e4ccaac2ebe41d7c7beb9f743b2ccdc1cc2e8d25d73bdac18201c4f26cbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cff1e4ccaac2ebe41d7c7beb9f743b2ccdc1cc2e8d25d73bdac18201c4f26cbb", kill_on_drop: false }`
[INFO] [stdout] cff1e4ccaac2ebe41d7c7beb9f743b2ccdc1cc2e8d25d73bdac18201c4f26cbb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5eb57b91f684d7da2e1a4d61ea4e9efa0511462b04278ea9507dc10cbea35862
[INFO] running `Command { std: "docker" "start" "-a" "5eb57b91f684d7da2e1a4d61ea4e9efa0511462b04278ea9507dc10cbea35862", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling proc-macro2 v1.0.17
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.25
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking atom v0.3.5
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]     Checking hibitset v0.6.3
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking downcast-rs v1.1.1
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]    Compiling wayland-scanner v0.23.6
[INFO] [stderr]     Checking gfx-hal v0.5.0
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling shaderc-sys v0.6.2
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]    Compiling x11-dl v2.18.5
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking euclid v0.20.13
[INFO] [stderr]     Checking sid v0.6.1
[INFO] [stderr]     Checking line_drawing v0.7.0
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]     Checking ash v0.30.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking wayland-sys v0.23.6
[INFO] [stderr]     Checking copyless v0.1.4
[INFO] [stderr]     Checking rusttype v0.8.3
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.21.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking xdg v2.2.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr] The following warnings were emitted during compilation:
[INFO] [stderr] 
[INFO] [stderr] warning: shaderc-sys@0.6.2: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: shaderc-sys@0.6.2: System installed library not found.  Falling back to build from source
[INFO] [stderr] 
[INFO] [stderr] error: failed to run custom build command for `shaderc-sys v0.6.2`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/shaderc-sys-bfcb32aa5299dce2/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stdout
[INFO] [stderr]   cargo:warning=Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr]   cargo:warning=System installed library not found.  Falling back to build from source
[INFO] [stderr] 
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/shaderc-sys-0.6.2/build/cmd_finder.rs:50:13:
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   couldn't find required command: "python"
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x55ef2359e9fc - std::backtrace_rs::backtrace::libunwind::trace::ha637c64ce894333a
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stderr]      1:     0x55ef2359e9fc - std::backtrace_rs::backtrace::trace_unsynchronized::h47f62dea28e0c88d
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x55ef2359e9fc - std::sys_common::backtrace::_print_fmt::h9eef0abe20ede486
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stderr]      3:     0x55ef2359e9fc - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hed7f999df88cc644
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x55ef235c4700 - core::fmt::rt::Argument::fmt::h1539a9308b8d058d
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x55ef235c4700 - core::fmt::write::h3a39390d8560d9c9
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:1120:17
[INFO] [stderr]      6:     0x55ef2359bf0f - std::io::Write::write_fmt::h5fc9997dfe05f882
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:1762:15
[INFO] [stderr]      7:     0x55ef2359e7e4 - std::sys_common::backtrace::_print::h894006fb5c6f3d45
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      8:     0x55ef2359e7e4 - std::sys_common::backtrace::print::h23a2d212c6fff936
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      9:     0x55ef2359ff07 - std::panicking::default_hook::{{closure}}::h8a1d2ee00185001a
[INFO] [stderr]     10:     0x55ef2359fc6f - std::panicking::default_hook::h6038f2eba384e475
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:292:9
[INFO] [stderr]     11:     0x55ef235a0388 - std::panicking::rust_panic_with_hook::h2b5517d590cab22e
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:779:13
[INFO] [stderr]     12:     0x55ef235a026e - std::panicking::begin_panic_handler::{{closure}}::h233112c06e0ef43e
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:657:13
[INFO] [stderr]     13:     0x55ef2359eec6 - std::sys_common::backtrace::__rust_end_short_backtrace::h6e893f24d7ebbff8
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stderr]     14:     0x55ef2359ffd2 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:645:5
[INFO] [stderr]     15:     0x55ef235345d5 - core::panicking::panic_fmt::hbf0e066aabfa482c
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:72:14
[INFO] [stderr]     16:     0x55ef23538b86 - build_script_build::cmd_finder::CommandFinder::must_have::{{closure}}::hb87287dc9a1565d8
[INFO] [stderr]     17:     0x55ef23536039 - core::option::Option<T>::unwrap_or_else::h0b9aa39de6f7bbce
[INFO] [stderr]     18:     0x55ef23538aea - build_script_build::cmd_finder::CommandFinder::must_have::h4a51512194bcb762
[INFO] [stderr]     19:     0x55ef2353b8f3 - build_script_build::main::h7acfc80a648f7f6e
[INFO] [stderr]     20:     0x55ef23535a13 - core::ops::function::FnOnce::call_once::he6abdfd9536aceda
[INFO] [stderr]     21:     0x55ef23534dc6 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha7a70cfecbd403b7
[INFO] [stderr]     22:     0x55ef23535499 - std::rt::lang_start::{{closure}}::h161366a92adf2c1e
[INFO] [stderr]     23:     0x55ef235980a7 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::hd95060ecd5e1ca24
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     24:     0x55ef235980a7 - std::panicking::try::do_call::h6e8cf51db32a6e4b
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stderr]     25:     0x55ef235980a7 - std::panicking::try::h3a52eefe24fe3c29
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stderr]     26:     0x55ef235980a7 - std::panic::catch_unwind::h24c28c23c02c3841
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stderr]     27:     0x55ef235980a7 - std::rt::lang_start_internal::{{closure}}::h705d3c9cbc06ef47
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/rt.rs:148:48
[INFO] [stderr]     28:     0x55ef235980a7 - std::panicking::try::do_call::ha21f52ba13158470
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stderr]     29:     0x55ef235980a7 - std::panicking::try::h5581346bf6aeb1f8
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stderr]     30:     0x55ef235980a7 - std::panic::catch_unwind::h7919645a6b72e25b
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stderr]     31:     0x55ef235980a7 - std::rt::lang_start_internal::h12de51168669836e
[INFO] [stderr]                                  at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/rt.rs:148:20
[INFO] [stderr]     32:     0x55ef23535477 - std::rt::lang_start::h28d2b78f251116e1
[INFO] [stderr]     33:     0x55ef2353c065 - main
[INFO] [stderr]     34:     0x7f38e52bbd90 - <unknown>
[INFO] [stderr]     35:     0x7f38e52bbe40 - __libc_start_main
[INFO] [stderr]     36:     0x55ef23534cf5 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5eb57b91f684d7da2e1a4d61ea4e9efa0511462b04278ea9507dc10cbea35862", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5eb57b91f684d7da2e1a4d61ea4e9efa0511462b04278ea9507dc10cbea35862", kill_on_drop: false }`
[INFO] [stdout] 5eb57b91f684d7da2e1a4d61ea4e9efa0511462b04278ea9507dc10cbea35862
