[INFO] updating cached repository iohub/piece
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/iohub/piece
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/iohub/piece" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/iohub/piece"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/iohub/piece'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iohub/piece" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/iohub/piece"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/iohub/piece'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2435d7c783184f70c410675578b16fbfc6330da2
[INFO] sha for GitHub repo iohub/piece: 2435d7c783184f70c410675578b16fbfc6330da2
[INFO] validating manifest of iohub/piece on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of iohub/piece on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing iohub/piece
[INFO] finished frobbing iohub/piece
[INFO] frobbed toml for iohub/piece written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/iohub/piece/Cargo.toml
[INFO] started frobbing iohub/piece
[INFO] finished frobbing iohub/piece
[INFO] frobbed toml for iohub/piece written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/iohub/piece/Cargo.toml
[INFO] crate iohub/piece already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking iohub/piece against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-7/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/iohub/piece:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1fd30958dfbc1342635380491be802ab28354b0ce6143ed7c91f01545d23d557
[INFO] running `"docker" "start" "-a" "1fd30958dfbc1342635380491be802ab28354b0ce6143ed7c91f01545d23d557"`
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling llvm-sys v60.3.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling docopt v1.0.2
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr] error: failed to run custom build command for `llvm-sys v60.3.0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/llvm-sys-520bec7b7f7e9068/build-script-build` (exit code: 101)
[INFO] [stderr] --- stdout
[INFO] [stderr] Found LLVM version 3.8.0 on PATH, but need 6.0.0.
[INFO] [stderr] Didn't find usable system-wide LLVM.
[INFO] [stderr] No suitable version of LLVM was found system-wide or pointed
[INFO] [stderr]                   to by LLVM_SYS_60_PREFIX.
[INFO] [stderr]                   
[INFO] [stderr]                   Consider using `llvmenv` to compile an appropriate copy of LLVM, and
[INFO] [stderr]                   refer to the llvm-sys documentation for more information.
[INFO] [stderr]                   
[INFO] [stderr]                   llvm-sys: https://crates.io/crates/llvm-sys
[INFO] [stderr]                   llvmenv: https://crates.io/crates/llvmenv
[INFO] [stderr] 
[INFO] [stderr] --- stderr
[INFO] [stderr] thread 'main' panicked at 'Could not find a compatible version of LLVM', /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:63:9
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55913c734d7b - backtrace::backtrace::libunwind::trace::h3a6a6e8afb7ff2de
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x55913c734d7b - backtrace::backtrace::trace_unsynchronized::h2220292c79f07c05
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55913c734d7b - std::sys_common::backtrace::_print::h8ff1c2c5cb3b84f7
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x55913c734d7b - std::sys_common::backtrace::print::h2254c58d69a73304
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x55913c734d7b - std::panicking::default_hook::{{closure}}::hc21cbd062363cef6
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x55913c734a56 - std::panicking::default_hook::hfea076cda52c2914
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x55913c7354ed - std::panicking::rust_panic_with_hook::h746830f9f479e849
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x55913c66cb15 - std::panicking::begin_panic::h8296147869b8aa51
[INFO] [stderr]                                at /rustc/266783e4e09e4e9d5307c1c8e695659c58bbcac7/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x55913c4e1d5e - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__static_ref_initialize::h95e091bafa211a39
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:63
[INFO] [stderr]    9:     0x55913c4e1d5e - core::ops::function::FnOnce::call_once::hab925347d948f056
[INFO] [stderr]                                at /rustc/266783e4e09e4e9d5307c1c8e695659c58bbcac7/src/libcore/ops/function.rs:235
[INFO] [stderr]   10:     0x55913c4e602f - lazy_static::lazy::Lazy<T>::get::{{closure}}::h7faaec87c8dc2469
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/inline_lazy.rs:28
[INFO] [stderr]   11:     0x55913c4e0f3b - std::sync::once::Once::call_once::{{closure}}::h5782417e4be378ad
[INFO] [stderr]                                at /rustc/266783e4e09e4e9d5307c1c8e695659c58bbcac7/src/libstd/sync/once.rs:225
[INFO] [stderr]   12:     0x55913c7320b8 - std::sync::once::Once::call_inner::h311c5ec419ddd1fd
[INFO] [stderr]                                at src/libstd/sync/once.rs:392
[INFO] [stderr]   13:     0x55913c4e0e83 - std::sync::once::Once::call_once::hdfba5cd41cf9fe75
[INFO] [stderr]                                at /rustc/266783e4e09e4e9d5307c1c8e695659c58bbcac7/src/libstd/sync/once.rs:225
[INFO] [stderr]   14:     0x55913c4dd365 - lazy_static::lazy::Lazy<T>::get::hd9a0243f9dc0d5c7
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/inline_lazy.rs:27
[INFO] [stderr]   15:     0x55913c4dd365 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__stability::h054d4b2186ab2671
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/<::lazy_static::__lazy_static_internal macros>:17
[INFO] [stderr]   16:     0x55913c4dd365 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::habf507d8ef1b41f7
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/<::lazy_static::__lazy_static_internal macros>:19
[INFO] [stderr]   17:     0x55913c4dacda - build_script_build::llvm_config::h4b056bc7396a264d
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:150
[INFO] [stderr]   18:     0x55913c4dc330 - build_script_build::get_llvm_cflags::h84efc6bab03eb37e
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:259
[INFO] [stderr]   19:     0x55913c4dc72e - build_script_build::main::he91393812e596b0f
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:284
[INFO] [stderr]   20:     0x55913c4e0cf0 - std::rt::lang_start::{{closure}}::h9fceabe38de82ab3
[INFO] [stderr]                                at /rustc/266783e4e09e4e9d5307c1c8e695659c58bbcac7/src/libstd/rt.rs:64
[INFO] [stderr]   21:     0x55913c734ef3 - std::rt::lang_start_internal::{{closure}}::h14c5bec2472d54ad
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   22:     0x55913c734ef3 - std::panicking::try::do_call::h88f516924fc6a288
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   23:     0x55913c73d65a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stderr]   24:     0x55913c7359fd - std::panicking::try::ha613ca8bf0a1302a
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   25:     0x55913c7359fd - std::panic::catch_unwind::h68d4ca98047bc7c5
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   26:     0x55913c7359fd - std::rt::lang_start_internal::h600c3ba1b556e68a
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   27:     0x55913c4e0cc9 - std::rt::lang_start::hfec879fbf990ec7b
[INFO] [stderr]                                at /rustc/266783e4e09e4e9d5307c1c8e695659c58bbcac7/src/libstd/rt.rs:64
[INFO] [stderr]   28:     0x55913c4dd3ea - main
[INFO] [stderr]   29:     0x7f4c2d1d12e1 - __libc_start_main
[INFO] [stderr]   30:     0x55913c4d9aca - _start
[INFO] [stderr]   31:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "1fd30958dfbc1342635380491be802ab28354b0ce6143ed7c91f01545d23d557"`
[INFO] running `"docker" "rm" "-f" "1fd30958dfbc1342635380491be802ab28354b0ce6143ed7c91f01545d23d557"`
[INFO] [stdout] 1fd30958dfbc1342635380491be802ab28354b0ce6143ed7c91f01545d23d557