[INFO] cloning repository https://github.com/yasu0001/rbre
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yasu0001/rbre" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyasu0001%2Frbre", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyasu0001%2Frbre'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 839dc7e90f630692429ec357d709733f90a6f350
[INFO] checking yasu0001/rbre against try#c8085cfed34c45021fc8f66d073f6394b3e35431 for pr-148939
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyasu0001%2Frbre" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yasu0001/rbre
[INFO] finished tweaking git repo https://github.com/yasu0001/rbre
[INFO] tweaked toml for git repo https://github.com/yasu0001/rbre written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yasu0001/rbre on toolchain c8085cfed34c45021fc8f66d073f6394b3e35431
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yasu0001/rbre 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" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded vulkano-shaders v0.16.0
[INFO] [stderr]   Downloaded vulkano-win v0.16.0
[INFO] [stderr]   Downloaded vk-sys v0.5.0
[INFO] [stderr]   Downloaded shaderc v0.6.1
[INFO] [stderr]   Downloaded crossbeam-queue v0.2.0
[INFO] [stderr]   Downloaded half v1.4.0
[INFO] [stderr]   Downloaded vulkano v0.16.0
[INFO] [stderr]   Downloaded shaderc-sys v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87cf19d15786f53c465752619b1b54c689421a13797711e79d5ecb0c534ce3b7
[INFO] running `Command { std: "docker" "start" "-a" "87cf19d15786f53c465752619b1b54c689421a13797711e79d5ecb0c534ce3b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87cf19d15786f53c465752619b1b54c689421a13797711e79d5ecb0c534ce3b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87cf19d15786f53c465752619b1b54c689421a13797711e79d5ecb0c534ce3b7", kill_on_drop: false }`
[INFO] [stdout] 87cf19d15786f53c465752619b1b54c689421a13797711e79d5ecb0c534ce3b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71dc99e1e6a745241ed9dcf9c5806fcd750f98a379ad57243626b038645ef24f
[INFO] running `Command { std: "docker" "start" "-a" "71dc99e1e6a745241ed9dcf9c5806fcd750f98a379ad57243626b038645ef24f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]     Checking downcast-rs v1.1.1
[INFO] [stderr]    Compiling memoffset v0.5.2
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling vulkano v0.16.0
[INFO] [stderr]     Checking vk-sys v0.5.0
[INFO] [stderr]     Checking half v1.4.0
[INFO] [stderr]     Checking crossbeam-channel v0.4.0
[INFO] [stderr]     Checking crossbeam-queue v0.2.0
[INFO] [stderr]    Compiling x11-dl v2.18.4
[INFO] [stderr]     Checking stb_truetype v0.3.0
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling shaderc-sys v0.6.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr] warning: shaderc-sys@0.6.1: Checking for system installed libraries.  Use --features = build-from-source to disable this behavior
[INFO] [stderr] warning: shaderc-sys@0.6.1: System installed library not found.  Falling back to build from source
[INFO] [stderr] error: failed to run custom build command for `shaderc-sys v0.6.1`
[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-9722e8f602eb7b56/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] 
[INFO] [stderr]   thread 'main' (593) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/shaderc-sys-0.6.1/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:     0x5880bf5f0a82 - std::backtrace_rs::backtrace::libunwind::trace::h73fb80180a497102
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x5880bf5f0a82 - std::backtrace_rs::backtrace::trace_unsynchronized::h543e31fe8d798117
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x5880bf5f0a82 - std::sys::backtrace::_print_fmt::h48210104103c8004
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x5880bf5f0a82 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::he200e767b7882707
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x5880bf6009c7 - core::fmt::rt::Argument::fmt::ha3ab30dd35ae499a
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x5880bf6009c7 - core::fmt::write::hfec5e43e1831544a
[INFO] [stderr]      6:     0x5880bf5c2676 - std::io::default_write_fmt::hc42f6b1b9d03b902
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x5880bf5c2676 - std::io::Write::write_fmt::h584047a337177544
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/io/mod.rs:1994:13
[INFO] [stderr]      8:     0x5880bf5cee11 - std::sys::backtrace::BacktraceLock::print::hc290b36733a7ec35
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x5880bf5cee11 - std::panicking::default_hook::{{closure}}::h7ca62870151c105a
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:293:27
[INFO] [stderr]     10:     0x5880bf5cec36 - std::panicking::default_hook::h7210b5b89c7d5207
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:320:9
[INFO] [stderr]     11:     0x5880bf5cf31b - std::panicking::panic_with_hook::h2f2fd5ec6be276b7
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:826:13
[INFO] [stderr]     12:     0x5880bf5cf198 - std::panicking::panic_handler::{{closure}}::h7d38e29e87f90fcd
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:699:13
[INFO] [stderr]     13:     0x5880bf5cc909 - std::sys::backtrace::__rust_end_short_backtrace::hb326948df51b3c67
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]     14:     0x5880bf5b6e8d - __rustc[ca415c722355c310]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:690:5
[INFO] [stderr]     15:     0x5880bf60405c - core::panicking::panic_fmt::h593feb94c4ce4cdf
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x5880bf5754e6 - build_script_build::cmd_finder::CommandFinder::must_have::{{closure}}::h96f96b57bb9f16aa
[INFO] [stderr]     17:     0x5880bf579b39 - core::option::Option<T>::unwrap_or_else::hb96d14bfe17b81dd
[INFO] [stderr]     18:     0x5880bf57546c - build_script_build::cmd_finder::CommandFinder::must_have::h4c4207c0225ea506
[INFO] [stderr]     19:     0x5880bf578293 - build_script_build::main::hd5167b12d6cc301f
[INFO] [stderr]     20:     0x5880bf579353 - core::ops::function::FnOnce::call_once::hcacaa1c5195e1fc5
[INFO] [stderr]     21:     0x5880bf578e06 - std::sys::backtrace::__rust_begin_short_backtrace::h1dbedd26aa0d7913
[INFO] [stderr]     22:     0x5880bf578d39 - std::rt::lang_start::{{closure}}::h5fcc713c0de1d0b5
[INFO] [stderr]     23:     0x5880bf5c3e5a - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h0403e5920663a070
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     24:     0x5880bf5c3e5a - std::panicking::catch_unwind::do_call::hae3fc24e24aa4045
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:582:40
[INFO] [stderr]     25:     0x5880bf5c3e5a - std::panicking::catch_unwind::h41f79d0960c31dac
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:545:19
[INFO] [stderr]     26:     0x5880bf5c3e5a - std::panic::catch_unwind::hab18277cacc223e8
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panic.rs:359:14
[INFO] [stderr]     27:     0x5880bf5c3e5a - std::rt::lang_start_internal::{{closure}}::h2b7b01f1cabaa7b3
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/rt.rs:175:24
[INFO] [stderr]     28:     0x5880bf5c3e5a - std::panicking::catch_unwind::do_call::h289dc8e834bc3205
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:582:40
[INFO] [stderr]     29:     0x5880bf5c3e5a - std::panicking::catch_unwind::h26dfdefec448e382
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panicking.rs:545:19
[INFO] [stderr]     30:     0x5880bf5c3e5a - std::panic::catch_unwind::he48def0de55b27dc
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/panic.rs:359:14
[INFO] [stderr]     31:     0x5880bf5c3e5a - std::rt::lang_start_internal::hecb0a225f409fde2
[INFO] [stderr]                                  at /rustc/c8085cfed34c45021fc8f66d073f6394b3e35431/library/std/src/rt.rs:171:5
[INFO] [stderr]     32:     0x5880bf578d21 - std::rt::lang_start::h04a03c4b1bef75ea
[INFO] [stderr]     33:     0x5880bf57b315 - main
[INFO] [stderr]     34:     0x7736277d01ca - <unknown>
[INFO] [stderr]     35:     0x7736277d028b - __libc_start_main
[INFO] [stderr]     36:     0x5880bf574585 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "71dc99e1e6a745241ed9dcf9c5806fcd750f98a379ad57243626b038645ef24f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71dc99e1e6a745241ed9dcf9c5806fcd750f98a379ad57243626b038645ef24f", kill_on_drop: false }`
[INFO] [stdout] 71dc99e1e6a745241ed9dcf9c5806fcd750f98a379ad57243626b038645ef24f