[INFO] cloning repository https://github.com/colekurk/vulkano_shader_issue
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/colekurk/vulkano_shader_issue" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolekurk%2Fvulkano_shader_issue", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolekurk%2Fvulkano_shader_issue'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6eb0ca9df33478971a7860c6d1697619beb297dd
[INFO] testing colekurk/vulkano_shader_issue against try#a7ce54db9b096bd1098d07c645b489195a667c9f for pr-137940
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolekurk%2Fvulkano_shader_issue" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/colekurk/vulkano_shader_issue on toolchain a7ce54db9b096bd1098d07c645b489195a667c9f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/colekurk/vulkano_shader_issue
[INFO] finished tweaking git repo https://github.com/colekurk/vulkano_shader_issue
[INFO] tweaked toml for git repo https://github.com/colekurk/vulkano_shader_issue written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/colekurk/vulkano_shader_issue 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" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shaderc v0.6.1
[INFO] [stderr]   Downloaded vulkano-shaders v0.14.0
[INFO] [stderr]   Downloaded crossbeam v0.7.2
[INFO] [stderr]   Downloaded half v1.3.0
[INFO] [stderr]   Downloaded cmake v0.1.41
[INFO] [stderr]   Downloaded vk-sys v0.4.0
[INFO] [stderr]   Downloaded vulkano v0.14.0
[INFO] [stderr]   Downloaded shaderc-sys v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47c270cb42df1b613f6f9c84b82c2cede97ce5ce59501d250e966aadca6c1a44
[INFO] running `Command { std: "docker" "start" "-a" "47c270cb42df1b613f6f9c84b82c2cede97ce5ce59501d250e966aadca6c1a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47c270cb42df1b613f6f9c84b82c2cede97ce5ce59501d250e966aadca6c1a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47c270cb42df1b613f6f9c84b82c2cede97ce5ce59501d250e966aadca6c1a44", kill_on_drop: false }`
[INFO] [stdout] 47c270cb42df1b613f6f9c84b82c2cede97ce5ce59501d250e966aadca6c1a44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+a7ce54db9b096bd1098d07c645b489195a667c9f" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e4122ef5d343333eef9b781c2c055dd3501441d6f91657e5cc6c2428004d8aa
[INFO] running `Command { std: "docker" "start" "-a" "5e4122ef5d343333eef9b781c2c055dd3501441d6f91657e5cc6c2428004d8aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling cc v1.0.40
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling vulkano v0.14.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling cmake v0.1.41
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling gif v0.10.2
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling half v1.3.0
[INFO] [stderr]    Compiling vk-sys v0.4.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling shared_library v0.1.9
[INFO] [stderr]    Compiling shaderc-sys v0.6.1
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling crossbeam v0.7.2
[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-736ba8c5abd6910f/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' 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:     0x5eb1cd238722 - std::backtrace_rs::backtrace::libunwind::trace::h8d95625898284e7d
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x5eb1cd238722 - std::backtrace_rs::backtrace::trace_unsynchronized::h9eafd5c61303e492
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x5eb1cd238722 - std::sys::backtrace::_print_fmt::hec2578e807cc4a3f
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x5eb1cd238722 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hd8ebefbbcb1fe23a
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x5eb1cd25ca53 - core::fmt::rt::Argument::fmt::h09f3c4b7b5ff5386
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/fmt/rt.rs:185:76
[INFO] [stderr]      5:     0x5eb1cd25ca53 - core::fmt::write::hef9d041e1d5d9592
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/fmt/mod.rs:1449:21
[INFO] [stderr]      6:     0x5eb1cd235143 - std::io::Write::write_fmt::hd7148372e3f24f7f
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/io/mod.rs:1890:15
[INFO] [stderr]      7:     0x5eb1cd238572 - std::sys::backtrace::BacktraceLock::print::h263d323f217ce3a7
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      8:     0x5eb1cd239740 - std::panicking::default_hook::{{closure}}::h25050253f7dc0d3e
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:298:22
[INFO] [stderr]      9:     0x5eb1cd2394dd - std::panicking::default_hook::hf3291a4c87ea2887
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:325:9
[INFO] [stderr]     10:     0x5eb1cd23a122 - std::panicking::rust_panic_with_hook::h3550dbeaa1041124
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:831:13
[INFO] [stderr]     11:     0x5eb1cd239eaa - std::panicking::begin_panic_handler::{{closure}}::hde0dd646a9e2b5b7
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:704:13
[INFO] [stderr]     12:     0x5eb1cd238c19 - std::sys::backtrace::__rust_end_short_backtrace::haeb22ba48b4d728e
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/sys/backtrace.rs:168:18
[INFO] [stderr]     13:     0x5eb1cd239b3d - rust_begin_unwind
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:695:5
[INFO] [stderr]     14:     0x5eb1cd25b940 - core::panicking::panic_fmt::hca923aa694825dc3
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/panicking.rs:75:14
[INFO] [stderr]     15:     0x5eb1cd1d1728 - build_script_build::cmd_finder::CommandFinder::must_have::{{closure}}::h4db68d120cda2e52
[INFO] [stderr]     16:     0x5eb1cd1cf325 - core::option::Option<T>::unwrap_or_else::haecbe058a8ca0d23
[INFO] [stderr]     17:     0x5eb1cd1d16ac - build_script_build::cmd_finder::CommandFinder::must_have::h5c7e1bb79057da7a
[INFO] [stderr]     18:     0x5eb1cd1d3fc3 - build_script_build::main::hae9b83aae0179a6e
[INFO] [stderr]     19:     0x5eb1cd1ceba3 - core::ops::function::FnOnce::call_once::he39d9ea96fbb4c9a
[INFO] [stderr]     20:     0x5eb1cd1ce306 - std::sys::backtrace::__rust_begin_short_backtrace::h5fab8634170f8089
[INFO] [stderr]     21:     0x5eb1cd1ce249 - std::rt::lang_start::{{closure}}::hc758ff3fc92ed734
[INFO] [stderr]     22:     0x5eb1cd231110 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h33287b43c0d9b74e
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     23:     0x5eb1cd231110 - std::panicking::try::do_call::h950deea04e63c578
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:587:40
[INFO] [stderr]     24:     0x5eb1cd231110 - std::panicking::try::h8b80c9c9e5c511fb
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:550:19
[INFO] [stderr]     25:     0x5eb1cd231110 - std::panic::catch_unwind::h97d55420e82cf688
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panic.rs:359:14
[INFO] [stderr]     26:     0x5eb1cd231110 - std::rt::lang_start_internal::{{closure}}::h00d84c6e50c56107
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/rt.rs:168:24
[INFO] [stderr]     27:     0x5eb1cd231110 - std::panicking::try::do_call::hf5ef28c8d4275fb5
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:587:40
[INFO] [stderr]     28:     0x5eb1cd231110 - std::panicking::try::hda9c732051b56a12
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panicking.rs:550:19
[INFO] [stderr]     29:     0x5eb1cd231110 - std::panic::catch_unwind::hcdf79cd462221919
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/panic.rs:359:14
[INFO] [stderr]     30:     0x5eb1cd231110 - std::rt::lang_start_internal::ha3a6af00ba726ea7
[INFO] [stderr]                                  at /rustc/a7ce54db9b096bd1098d07c645b489195a667c9f/library/std/src/rt.rs:164:5
[INFO] [stderr]     31:     0x5eb1cd1ce231 - std::rt::lang_start::h618b221638ac7582
[INFO] [stderr]     32:     0x5eb1cd1d4945 - main
[INFO] [stderr]     33:     0x7630882e3d90 - <unknown>
[INFO] [stderr]     34:     0x7630882e3e40 - __libc_start_main
[INFO] [stderr]     35:     0x5eb1cd1cda65 - _start
[INFO] [stderr]     36:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5e4122ef5d343333eef9b781c2c055dd3501441d6f91657e5cc6c2428004d8aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e4122ef5d343333eef9b781c2c055dd3501441d6f91657e5cc6c2428004d8aa", kill_on_drop: false }`
[INFO] [stdout] 5e4122ef5d343333eef9b781c2c055dd3501441d6f91657e5cc6c2428004d8aa