[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-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/iohub/piece"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/iohub/piece'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iohub/piece" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/iohub/piece"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/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#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of iohub/piece on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-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-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/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-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/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" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking iohub/piece against try#18481b65f318e0b4b20c0fc61340054701719d6c for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-0/try#18481b65f318e0b4b20c0fc61340054701719d6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/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" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 98c45b65ea542c614043d2113083b89a010368e0e150fdf3c1be2f0f1cccd896
[INFO] running `"docker" "start" "-a" "98c45b65ea542c614043d2113083b89a010368e0e150fdf3c1be2f0f1cccd896"`
[INFO] [stderr]    Compiling either v1.5.1
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling bit-set v0.5.0
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling llvm-sys v60.3.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling docopt v1.0.2
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.0
[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-06d51b916f54dad0/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:     0x557ce07f7d5b - backtrace::backtrace::libunwind::trace::hbfb69e72f505529b
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x557ce07f7d5b - backtrace::backtrace::trace_unsynchronized::hac9ea77fa06b91bd
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.29/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x557ce07f7d5b - std::sys_common::backtrace::_print::hf6f722cabcf8c26d
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stderr]    3:     0x557ce07f7d5b - std::sys_common::backtrace::print::h9cca5983945bdb52
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stderr]    4:     0x557ce07f7d5b - std::panicking::default_hook::{{closure}}::h2fab7259edc3a80d
[INFO] [stderr]                                at src/libstd/panicking.rs:200
[INFO] [stderr]    5:     0x557ce07f7a37 - std::panicking::default_hook::ha99acf6d9268d46d
[INFO] [stderr]                                at src/libstd/panicking.rs:214
[INFO] [stderr]    6:     0x557ce07f84d0 - std::panicking::rust_panic_with_hook::hddab2c65ce92e648
[INFO] [stderr]                                at src/libstd/panicking.rs:477
[INFO] [stderr]    7:     0x557ce07449b8 - std::panicking::begin_panic::h21a08d03d4f3d875
[INFO] [stderr]                                at /rustc/18481b65f318e0b4b20c0fc61340054701719d6c/src/libstd/panicking.rs:411
[INFO] [stderr]    8:     0x557ce059ee5e - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__static_ref_initialize::ha073746067e21682
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:63
[INFO] [stderr]    9:     0x557ce059ee5e - core::ops::function::FnOnce::call_once::hdb755173d5cb8a4d
[INFO] [stderr]                                at /rustc/18481b65f318e0b4b20c0fc61340054701719d6c/src/libcore/ops/function.rs:231
[INFO] [stderr]   10:     0x557ce05a0e62 - lazy_static::lazy::Lazy<T>::get::{{closure}}::hce0eba4087a02e77
[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:     0x557ce059c80b - std::sync::once::Once::call_once::{{closure}}::ha59b0e3fffa51923
[INFO] [stderr]                                at /rustc/18481b65f318e0b4b20c0fc61340054701719d6c/src/libstd/sync/once.rs:225
[INFO] [stderr]   12:     0x557ce07f50e4 - std::sync::once::Once::call_inner::hec6811931650cc9e
[INFO] [stderr]                                at src/libstd/sync/once.rs:392
[INFO] [stderr]   13:     0x557ce059c6a3 - std::sync::once::Once::call_once::h16831c3eddc4ef08
[INFO] [stderr]                                at /rustc/18481b65f318e0b4b20c0fc61340054701719d6c/src/libstd/sync/once.rs:225
[INFO] [stderr]   14:     0x557ce0599e32 - lazy_static::lazy::Lazy<T>::get::h267ed01bea7cfce5
[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:     0x557ce0599e32 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__stability::h82fe8dcb8551bfd7
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/<::lazy_static::__lazy_static_internal macros>:12
[INFO] [stderr]   16:     0x557ce0599e32 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::h65b28462d542b9d6
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/<::lazy_static::__lazy_static_internal macros>:13
[INFO] [stderr]   17:     0x557ce059768a - build_script_build::llvm_config::h03684d2b4f75f54c
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:150
[INFO] [stderr]   18:     0x557ce0598da0 - build_script_build::get_llvm_cflags::hedea56b49dc1e2f5
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:259
[INFO] [stderr]   19:     0x557ce059919e - build_script_build::main::h3611d544ccb1c0d8
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-60.3.0/build.rs:284
[INFO] [stderr]   20:     0x557ce059d600 - std::rt::lang_start::{{closure}}::h269413ed325c7e07
[INFO] [stderr]                                at /rustc/18481b65f318e0b4b20c0fc61340054701719d6c/src/libstd/rt.rs:64
[INFO] [stderr]   21:     0x557ce07f7ed3 - std::rt::lang_start_internal::{{closure}}::hbec6d1ff7b00d029
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]   22:     0x557ce07f7ed3 - std::panicking::try::do_call::h83e51489f66cd002
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   23:     0x557ce080064a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:82
[INFO] [stderr]   24:     0x557ce07f89dd - std::panicking::try::hb1deae6a8854c8be
[INFO] [stderr]                                at src/libstd/panicking.rs:275
[INFO] [stderr]   25:     0x557ce07f89dd - std::panic::catch_unwind::hff09c33b8b66b7a2
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   26:     0x557ce07f89dd - std::rt::lang_start_internal::h01b3f7988e3fe75d
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   27:     0x557ce059d5d9 - std::rt::lang_start::h7c50603c9c2ca19c
[INFO] [stderr]                                at /rustc/18481b65f318e0b4b20c0fc61340054701719d6c/src/libstd/rt.rs:64
[INFO] [stderr]   28:     0x557ce0599eca - main
[INFO] [stderr]   29:     0x7f594866b2e1 - __libc_start_main
[INFO] [stderr]   30:     0x557ce059641a - _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" "98c45b65ea542c614043d2113083b89a010368e0e150fdf3c1be2f0f1cccd896"`
[INFO] running `"docker" "rm" "-f" "98c45b65ea542c614043d2113083b89a010368e0e150fdf3c1be2f0f1cccd896"`
[INFO] [stdout] 98c45b65ea542c614043d2113083b89a010368e0e150fdf3c1be2f0f1cccd896