[INFO] updating cached repository alexander-koch/loopc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alexander-koch/loopc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alexander-koch/loopc" "work/ex/beta-1.37-6/sources/1.36.0/gh/alexander-koch/loopc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/alexander-koch/loopc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alexander-koch/loopc" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexander-koch/loopc"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexander-koch/loopc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4cb724edce1e0f4798421803361a6ce35db94617
[INFO] sha for GitHub repo alexander-koch/loopc: 4cb724edce1e0f4798421803361a6ce35db94617
[INFO] validating manifest of alexander-koch/loopc on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alexander-koch/loopc on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alexander-koch/loopc
[INFO] finished frobbing alexander-koch/loopc
[INFO] frobbed toml for alexander-koch/loopc written to work/ex/beta-1.37-6/sources/1.36.0/gh/alexander-koch/loopc/Cargo.toml
[INFO] started frobbing alexander-koch/loopc
[INFO] finished frobbing alexander-koch/loopc
[INFO] frobbed toml for alexander-koch/loopc written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/alexander-koch/loopc/Cargo.toml
[INFO] crate alexander-koch/loopc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing alexander-koch/loopc against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/alexander-koch/loopc:/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] a1ffa93e8557621254ca7969691482cc37bb90b8e41d757a2cb40d60ed65d093
[INFO] running `"docker" "start" "-a" "a1ffa93e8557621254ca7969691482cc37bb90b8e41d757a2cb40d60ed65d093"`
[INFO] [stderr]    Compiling semver v0.6.0
[INFO] [stderr]    Compiling clap v2.29.4
[INFO] [stderr]    Compiling env_logger v0.5.3
[INFO] [stderr]    Compiling llvm-sys v50.0.3
[INFO] [stderr] error: failed to run custom build command for `llvm-sys v50.0.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/crater/target/debug/build/llvm-sys-5fd37796ddde9a29/build-script-build` (exit code: 101)
[INFO] [stderr] --- stdout
[INFO] [stderr] Found LLVM version 3.8.0 on PATH, but need 5.0.3.
[INFO] [stderr] Didn't find usable system-wide LLVM.
[INFO] [stderr] LLVM_SYS_50_PREFIX not set, not using precompiled binaries
[INFO] [stderr] LLVM_SYS_50_AUTOBUILD not set, will not automatically compile LLVM
[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-50.0.3/build.rs:77:9
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55892781c1f3 - std::sys::unix::backtrace::tracing::imp::unwind_backtrace::h6485381528590a55
[INFO] [stderr]                                at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
[INFO] [stderr]    1:     0x558927817bfb - std::sys_common::backtrace::_print::h49a82ae9552e35c7
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:71
[INFO] [stderr]    2:     0x55892781afb6 - std::panicking::default_hook::{{closure}}::he20974adbefcc046
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]                                at src/libstd/panicking.rs:197
[INFO] [stderr]    3:     0x55892781ad49 - std::panicking::default_hook::he4af6af4ac7fef7b
[INFO] [stderr]                                at src/libstd/panicking.rs:211
[INFO] [stderr]    4:     0x55892781b6bf - std::panicking::rust_panic_with_hook::h057ff03eb4c8000f
[INFO] [stderr]                                at src/libstd/panicking.rs:474
[INFO] [stderr]    5:     0x5589277f1857 - std::panicking::begin_panic::he039b55e3e2b9a75
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/panicking.rs:408
[INFO] [stderr]    6:     0x558927647642 - core::ops::function::FnOnce::call_once::hf4eaed08fbdfdfe5
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-50.0.3/build.rs:77
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libcore/ops/function.rs:231
[INFO] [stderr]    7:     0x5589276463b2 - lazy_static::lazy::Lazy<T>::get::{{closure}}::h7d8e5c73ce65c3fa
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-0.2.11/src/lazy.rs:24
[INFO] [stderr]    8:     0x55892764669a - std::sync::once::Once::call_once::{{closure}}::h8d5320937e1ea795
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/sync/once.rs:220
[INFO] [stderr]    9:     0x558927817075 - std::sync::once::Once::call_inner::h179d1a2b131ce906
[INFO] [stderr]                                at src/libstd/sync/once.rs:387
[INFO] [stderr]   10:     0x55892764653c - std::sync::once::Once::call_once::h1340c0807f3dd86f
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/sync/once.rs:220
[INFO] [stderr]   11:     0x558927643bce - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::h6acf64c9e2207aba
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-0.2.11/src/lazy.rs:23
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-50.0.3/<::lazy_static::__lazy_static_internal macros>:13
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-50.0.3/<::lazy_static::__lazy_static_internal macros>:14
[INFO] [stderr]   12:     0x5589276414a9 - build_script_build::llvm_config::h9df8064ab3b26b80
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-50.0.3/build.rs:164
[INFO] [stderr]   13:     0x558927642f72 - build_script_build::main::h605b3c9f35e861d3
[INFO] [stderr]                                at /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-50.0.3/build.rs:296
[INFO] [stderr]   14:     0x55892764a16f - std::rt::lang_start::{{closure}}::hc66e6a2130040013
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64
[INFO] [stderr]   15:     0x55892781b0c2 - std::panicking::try::do_call::hc3d8373a0b215f51
[INFO] [stderr]                                at src/libstd/rt.rs:49
[INFO] [stderr]                                at src/libstd/panicking.rs:293
[INFO] [stderr]   16:     0x558927823929 - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:85
[INFO] [stderr]   17:     0x55892781bbcc - std::rt::lang_start_internal::he5218c8b95d395f2
[INFO] [stderr]                                at src/libstd/panicking.rs:272
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]                                at src/libstd/rt.rs:48
[INFO] [stderr]   18:     0x55892764a148 - std::rt::lang_start::h6fc69e3cb944c8d2
[INFO] [stderr]                                at /rustc/a53f9df32fbb0b5f4382caaad8f1a46f36ea887c/src/libstd/rt.rs:64
[INFO] [stderr]   19:     0x558927643c19 - main
[INFO] [stderr]   20:     0x7f23e33ff2e0 - __libc_start_main
[INFO] [stderr]   21:     0x558927640149 - _start
[INFO] [stderr]   22:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a1ffa93e8557621254ca7969691482cc37bb90b8e41d757a2cb40d60ed65d093"`
[INFO] running `"docker" "rm" "-f" "a1ffa93e8557621254ca7969691482cc37bb90b8e41d757a2cb40d60ed65d093"`
[INFO] [stdout] a1ffa93e8557621254ca7969691482cc37bb90b8e41d757a2cb40d60ed65d093