[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 against try#0c70cfbec949d241375e31c5a42066be70c720fc for pr-149681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSnoozeTime%2Ftwgraph-shaders" "/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/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-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/SnoozeTime/twgraph-shaders on toolchain 0c70cfbec949d241375e31c5a42066be70c720fc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+0c70cfbec949d241375e31c5a42066be70c720fc" "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 proc-macro2 v0.4.27
[INFO] [stderr]   Downloaded crossbeam v0.5.0
[INFO] [stderr]   Downloaded quote v0.6.11
[INFO] [stderr]   Downloaded half v1.3.0
[INFO] [stderr]   Downloaded vk-sys v0.4.0
[INFO] [stderr]   Downloaded cmake v0.1.35
[INFO] [stderr]   Downloaded crossbeam-epoch v0.6.1
[INFO] [stderr]   Downloaded cc v1.0.30
[INFO] [stderr]   Downloaded syn v0.15.28
[INFO] [stderr]   Downloaded vulkano v0.11.1
[INFO] [stderr]   Downloaded libc v0.2.50
[INFO] [stderr]   Downloaded shaderc v0.3.16
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 46ab2ceecf9717c826d95c36c0d044526b5cea90bda71d0fa3d89b78ddd144a6
[INFO] running `Command { std: "docker" "start" "-a" "46ab2ceecf9717c826d95c36c0d044526b5cea90bda71d0fa3d89b78ddd144a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46ab2ceecf9717c826d95c36c0d044526b5cea90bda71d0fa3d89b78ddd144a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46ab2ceecf9717c826d95c36c0d044526b5cea90bda71d0fa3d89b78ddd144a6", kill_on_drop: false }`
[INFO] [stdout] 46ab2ceecf9717c826d95c36c0d044526b5cea90bda71d0fa3d89b78ddd144a6
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9826315ad9ad126b5c2aefbc4f354f4bf66207755fda8262fa81640715c716a
[INFO] running `Command { std: "docker" "start" "-a" "d9826315ad9ad126b5c2aefbc4f354f4bf66207755fda8262fa81640715c716a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling cc v1.0.30
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]     Checking smallvec v0.6.9
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stderr]    Compiling vulkano v0.11.1
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking vk-sys v0.4.0
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking half v1.3.0
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling cmake v0.1.35
[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]    Compiling crossbeam-epoch v0.7.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking quote v0.6.11
[INFO] [stderr]    Compiling shaderc v0.3.16
[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-80ded26fe6493c2e/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' (591) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/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:     0x56c41e6b4172 - std[eec8f75a7a098899]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x56c41e6b4172 - std[eec8f75a7a098899]::backtrace_rs::backtrace::trace_unsynchronized::<std[eec8f75a7a098899]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x56c41e6b4172 - std[eec8f75a7a098899]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/sys/backtrace.rs:68:9
[INFO] [stderr]      3:     0x56c41e6b4172 - <<std[eec8f75a7a098899]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[c7210762872bdbbf]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/sys/backtrace.rs:38:26
[INFO] [stderr]      4:     0x56c41e6c8a37 - <core[c7210762872bdbbf]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x56c41e6c8a37 - core[c7210762872bdbbf]::fmt::write
[INFO] [stderr]      6:     0x56c41e6ba7e6 - std[eec8f75a7a098899]::io::default_write_fmt::<std[eec8f75a7a098899]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/io/mod.rs:614:11
[INFO] [stderr]      7:     0x56c41e6ba7e6 - <std[eec8f75a7a098899]::sys::stdio::unix::Stderr as std[eec8f75a7a098899]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/io/mod.rs:1969:13
[INFO] [stderr]      8:     0x56c41e69614f - <std[eec8f75a7a098899]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/sys/backtrace.rs:41:9
[INFO] [stderr]      9:     0x56c41e69614f - std[eec8f75a7a098899]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x56c41e6af011 - std[eec8f75a7a098899]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x56c41e6af1cb - std[eec8f75a7a098899]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x56c41e696208 - std[eec8f75a7a098899]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x56c41e68db29 - std[eec8f75a7a098899]::sys::backtrace::__rust_end_short_backtrace::<std[eec8f75a7a098899]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/sys/backtrace.rs:176:18
[INFO] [stderr]     14:     0x56c41e696c6d - __rustc[da847b0bb261331d]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x56c41e6c907c - core[c7210762872bdbbf]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x56c41e643d96 - <build_script_build[c5a46f13bf2e242b]::cmd_finder::CommandFinder>::must_have::<&str>::{closure#0}
[INFO] [stderr]     17:     0x56c41e641809 - <core[c7210762872bdbbf]::option::Option<std[eec8f75a7a098899]::path::PathBuf>>::unwrap_or_else::<<build_script_build[c5a46f13bf2e242b]::cmd_finder::CommandFinder>::must_have<&str>::{closure#0}>
[INFO] [stderr]     18:     0x56c41e64178c - <build_script_build[c5a46f13bf2e242b]::cmd_finder::CommandFinder>::must_have::<&str>
[INFO] [stderr]     19:     0x56c41e6445aa - build_script_build[c5a46f13bf2e242b]::main
[INFO] [stderr]     20:     0x56c41e646d33 - <fn() as core[c7210762872bdbbf]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     21:     0x56c41e643286 - std[eec8f75a7a098899]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     22:     0x56c41e643eb9 - std[eec8f75a7a098899]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     23:     0x56c41e6ae196 - <&dyn core[c7210762872bdbbf]::ops::function::Fn<(), Output = i32> + core[c7210762872bdbbf]::marker::Sync + core[c7210762872bdbbf]::panic::unwind_safe::RefUnwindSafe as core[c7210762872bdbbf]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     24:     0x56c41e6ae196 - std[eec8f75a7a098899]::panicking::catch_unwind::do_call::<&dyn core[c7210762872bdbbf]::ops::function::Fn<(), Output = i32> + core[c7210762872bdbbf]::marker::Sync + core[c7210762872bdbbf]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:581:40
[INFO] [stderr]     25:     0x56c41e6ae196 - std[eec8f75a7a098899]::panicking::catch_unwind::<i32, &dyn core[c7210762872bdbbf]::ops::function::Fn<(), Output = i32> + core[c7210762872bdbbf]::marker::Sync + core[c7210762872bdbbf]::panic::unwind_safe::RefUnwindSafe>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:544:19
[INFO] [stderr]     26:     0x56c41e6ae196 - std[eec8f75a7a098899]::panic::catch_unwind::<&dyn core[c7210762872bdbbf]::ops::function::Fn<(), Output = i32> + core[c7210762872bdbbf]::marker::Sync + core[c7210762872bdbbf]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panic.rs:359:14
[INFO] [stderr]     27:     0x56c41e6ae196 - std[eec8f75a7a098899]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/rt.rs:175:24
[INFO] [stderr]     28:     0x56c41e6ae196 - std[eec8f75a7a098899]::panicking::catch_unwind::do_call::<std[eec8f75a7a098899]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:581:40
[INFO] [stderr]     29:     0x56c41e6ae196 - std[eec8f75a7a098899]::panicking::catch_unwind::<isize, std[eec8f75a7a098899]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panicking.rs:544:19
[INFO] [stderr]     30:     0x56c41e6ae196 - std[eec8f75a7a098899]::panic::catch_unwind::<std[eec8f75a7a098899]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/panic.rs:359:14
[INFO] [stderr]     31:     0x56c41e6ae196 - std[eec8f75a7a098899]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/0c70cfbec949d241375e31c5a42066be70c720fc/library/std/src/rt.rs:171:5
[INFO] [stderr]     32:     0x56c41e643271 - std[eec8f75a7a098899]::rt::lang_start::<()>
[INFO] [stderr]     33:     0x56c41e646eb5 - main
[INFO] [stderr]     34:     0x785bf52d21ca - <unknown>
[INFO] [stderr]     35:     0x785bf52d228b - __libc_start_main
[INFO] [stderr]     36:     0x56c41e640b95 - _start
[INFO] [stderr]     37:                0x0 - <unknown>
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d9826315ad9ad126b5c2aefbc4f354f4bf66207755fda8262fa81640715c716a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9826315ad9ad126b5c2aefbc4f354f4bf66207755fda8262fa81640715c716a", kill_on_drop: false }`
[INFO] [stdout] d9826315ad9ad126b5c2aefbc4f354f4bf66207755fda8262fa81640715c716a