[INFO] cloning repository https://github.com/SnoozeTime/twgraph-shaders
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SnoozeTime/twgraph-shaders" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSnoozeTime%2Ftwgraph-shaders", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSnoozeTime%2Ftwgraph-shaders'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9866edff35636a8ebd38a1272b4834ed02f47185
[INFO] checking SnoozeTime/twgraph-shaders/9866edff35636a8ebd38a1272b4834ed02f47185 against master#7bdae134cba57426d3c56b5de737a351762445e1 for pr-123794
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSnoozeTime%2Ftwgraph-shaders" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SnoozeTime/twgraph-shaders on toolchain 7bdae134cba57426d3c56b5de737a351762445e1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7bdae134cba57426d3c56b5de737a351762445e1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SnoozeTime/twgraph-shaders
[INFO] finished tweaking git repo https://github.com/SnoozeTime/twgraph-shaders
[INFO] tweaked toml for git repo https://github.com/SnoozeTime/twgraph-shaders written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/SnoozeTime/twgraph-shaders 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" "+7bdae134cba57426d3c56b5de737a351762445e1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cmake v0.1.35
[INFO] [stderr]   Downloaded crossbeam v0.5.0
[INFO] [stderr]   Downloaded cc v1.0.30
[INFO] [stderr]   Downloaded syn v0.15.28
[INFO] [stderr]   Downloaded vulkano v0.11.1
[INFO] [stderr]   Downloaded shaderc v0.3.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+7bdae134cba57426d3c56b5de737a351762445e1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 527ad2eebaac3aed3ad3aab493da9e3f9585dfdd8edd621bf8fd78b97b791140
[INFO] running `Command { std: "docker" "start" "-a" "527ad2eebaac3aed3ad3aab493da9e3f9585dfdd8edd621bf8fd78b97b791140", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "527ad2eebaac3aed3ad3aab493da9e3f9585dfdd8edd621bf8fd78b97b791140", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "527ad2eebaac3aed3ad3aab493da9e3f9585dfdd8edd621bf8fd78b97b791140", kill_on_drop: false }`
[INFO] [stdout] 527ad2eebaac3aed3ad3aab493da9e3f9585dfdd8edd621bf8fd78b97b791140
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7bdae134cba57426d3c56b5de737a351762445e1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b13a5cbfbbe1a33fab11688ba62e50f99dff10e6d08fba61c774ab4006199832
[INFO] running `Command { std: "docker" "start" "-a" "b13a5cbfbbe1a33fab11688ba62e50f99dff10e6d08fba61c774ab4006199832", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling cc v1.0.30
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling vulkano v0.11.1
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling owning_ref v0.4.0
[INFO] [stderr]     Checking vk-sys v0.4.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking half v1.3.0
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cmake v0.1.35
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]    Compiling shaderc v0.3.16
[INFO] [stderr]     Checking quote v0.6.11
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling num_cpus v1.10.0
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]     Checking syn v0.15.28
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr] error: failed to run custom build command for `shaderc v0.3.16`
[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-3633ac9f3e6cb28b/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   thread 'main' panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/shaderc-0.3.16/build/cmd_finder.rs:45:13:
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   couldn't find required command: "python"
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x56013a31c765 - std::backtrace_rs::backtrace::libunwind::trace::h005ddb14be77e4f8
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stderr]      1:     0x56013a31c765 - std::backtrace_rs::backtrace::trace_unsynchronized::hf4df49573026e0fa
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]      2:     0x56013a31c765 - std::sys_common::backtrace::_print_fmt::hde41dc7cbf552b00
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stderr]      3:     0x56013a31c765 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h187e644bb90506b4
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]      4:     0x56013a33fb3b - core::fmt::rt::Argument::fmt::h07b913606448168b
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/core/src/fmt/rt.rs:142:9
[INFO] [stderr]      5:     0x56013a33fb3b - core::fmt::write::h1fab5822f4720df4
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/core/src/fmt/mod.rs:1153:17
[INFO] [stderr]      6:     0x56013a319a9f - std::io::Write::write_fmt::h5f4793c6abb256e7
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/io/mod.rs:1832:15
[INFO] [stderr]      7:     0x56013a31c53e - std::sys_common::backtrace::_print::h61948819825f5f86
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]      8:     0x56013a31c53e - std::sys_common::backtrace::print::h87a388c2a772fccc
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]      9:     0x56013a31da19 - std::panicking::default_hook::{{closure}}::h8033f939805b5bbd
[INFO] [stderr]     10:     0x56013a31d75d - std::panicking::default_hook::h6b969458241c99e1
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:291:9
[INFO] [stderr]     11:     0x56013a31deb4 - std::panicking::rust_panic_with_hook::h32ca1249054fbee2
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:788:13
[INFO] [stderr]     12:     0x56013a31dd96 - std::panicking::begin_panic_handler::{{closure}}::h9e773b945b7a7bc5
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:657:13
[INFO] [stderr]     13:     0x56013a31cc29 - std::sys_common::backtrace::__rust_end_short_backtrace::he2eec1051ab90568
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stderr]     14:     0x56013a31dac7 - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:645:5
[INFO] [stderr]     15:     0x56013a2b6096 - core::panicking::panic_fmt::hda1113eeb3f6380a
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/core/src/panicking.rs:72:14
[INFO] [stderr]     16:     0x56013a2bc096 - build_script_build::cmd_finder::CommandFinder::must_have::{{closure}}::h6caf47d9b4852f9f
[INFO] [stderr]     17:     0x56013a2b9983 - core::option::Option<T>::unwrap_or_else::h30e5079e7e36fcc9
[INFO] [stderr]     18:     0x56013a2bbff8 - build_script_build::cmd_finder::CommandFinder::must_have::hff45eb60d9195661
[INFO] [stderr]     19:     0x56013a2bc712 - build_script_build::main::h5087cda6b09ebe46
[INFO] [stderr]     20:     0x56013a2b92b3 - core::ops::function::FnOnce::call_once::he1629845dc6b5690
[INFO] [stderr]     21:     0x56013a2b86c6 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha13bc550d36a7589
[INFO] [stderr]     22:     0x56013a2b8cf9 - std::rt::lang_start::{{closure}}::hce1de6480ad09cc1
[INFO] [stderr]     23:     0x56013a315cc6 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h6849b8db72491e1d
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     24:     0x56013a315cc6 - std::panicking::try::do_call::hce5a3927bd52ae7e
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:552:40
[INFO] [stderr]     25:     0x56013a315cc6 - std::panicking::try::h960a4afe8f567a8e
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:516:19
[INFO] [stderr]     26:     0x56013a315cc6 - std::panic::catch_unwind::h5568e9a88c0d2ca1
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panic.rs:149:14
[INFO] [stderr]     27:     0x56013a315cc6 - std::rt::lang_start_internal::{{closure}}::h71d8ff313d562a6d
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/rt.rs:141:48
[INFO] [stderr]     28:     0x56013a315cc6 - std::panicking::try::do_call::h20928ec31c7ec11b
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:552:40
[INFO] [stderr]     29:     0x56013a315cc6 - std::panicking::try::hbf567076fd7e8120
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panicking.rs:516:19
[INFO] [stderr]     30:     0x56013a315cc6 - std::panic::catch_unwind::h8587f06b216047a4
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/panic.rs:149:14
[INFO] [stderr]     31:     0x56013a315cc6 - std::rt::lang_start_internal::h572cf638760c7516
[INFO] [stderr]                                  at /rustc/7bdae134cba57426d3c56b5de737a351762445e1/library/std/src/rt.rs:141:20
[INFO] [stderr]     32:     0x56013a2b8cd7 - std::rt::lang_start::ha3ed819060cceab1
[INFO] [stderr]     33:     0x56013a2bd1a5 - main
[INFO] [stderr]     34:     0x7f8f70084d90 - <unknown>
[INFO] [stderr]     35:     0x7f8f70084e40 - __libc_start_main
[INFO] [stderr]     36:     0x56013a2b66c5 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b13a5cbfbbe1a33fab11688ba62e50f99dff10e6d08fba61c774ab4006199832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b13a5cbfbbe1a33fab11688ba62e50f99dff10e6d08fba61c774ab4006199832", kill_on_drop: false }`
[INFO] [stdout] b13a5cbfbbe1a33fab11688ba62e50f99dff10e6d08fba61c774ab4006199832