[INFO] updating cached repository https://github.com/fexolm/jfec
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6de42e1766324b065d6ef53eb278677017d115bc
[INFO] checking fexolm/jfec against master#30ca215b4e38b32aa7abdd635c5e2d56f5724494 for pr-66037
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fexolm/jfec on toolchain 30ca215b4e38b32aa7abdd635c5e2d56f5724494
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fexolm/jfec
[INFO] finished tweaking git repo https://github.com/fexolm/jfec
[INFO] tweaked toml for git repo https://github.com/fexolm/jfec written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/fexolm/jfec already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bad0721f9c7e425531259e49d20d8910c9d753b6eb3507612cbe148be99146a2
[INFO] running `"docker" "start" "-a" "bad0721f9c7e425531259e49d20d8910c9d753b6eb3507612cbe148be99146a2"`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling cc v1.0.31
[INFO] [stderr]    Compiling regex v1.1.5
[INFO] [stderr]     Checking either v1.5.1
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]     Checking cast v0.1.0
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking pest v2.1.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]     Checking criterion-plot v0.1.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking simplelog v0.4.4
[INFO] [stderr]    Compiling pest_meta v2.1.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking criterion-stats v0.1.3
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]    Compiling llvm-sys v70.1.0
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr] error: failed to run custom build command for `llvm-sys v70.1.0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/llvm-sys-4747b867c34dbe2b/build-script-build` (exit code: 101)
[INFO] [stderr] --- stdout
[INFO] [stderr] Found LLVM version 6.0.0 on PATH, but need 7.0.0.
[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_70_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/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:73:9
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x563df64db0e4 - backtrace::backtrace::libunwind::trace::h80055c9fc04ee02a
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88
[INFO] [stderr]    1:     0x563df64db0e4 - backtrace::backtrace::trace_unsynchronized::hdc3325d56f0c3cf3
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x563df64db0e4 - std::sys_common::backtrace::_print_fmt::hf6698baf6d0d6f95
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:77
[INFO] [stderr]    3:     0x563df64db0e4 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hde7eb8c3d6c49873
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]    4:     0x563df64f991c - core::fmt::write::h5d76b6b7b1847936
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1057
[INFO] [stderr]    5:     0x563df64d7437 - std::io::Write::write_fmt::h77ba5ebe1eee52ad
[INFO] [stderr]                                at src/libstd/io/mod.rs:1426
[INFO] [stderr]    6:     0x563df64dd375 - std::sys_common::backtrace::_print::hf8a47a8d351e0fbd
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]    7:     0x563df64dd375 - std::sys_common::backtrace::print::h71ada4f56fb6e22c
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x563df64dd375 - std::panicking::default_hook::{{closure}}::h6a3ba1f4739dcd04
[INFO] [stderr]                                at src/libstd/panicking.rs:195
[INFO] [stderr]    9:     0x563df64dd061 - std::panicking::default_hook::he979893a7228a5c0
[INFO] [stderr]                                at src/libstd/panicking.rs:215
[INFO] [stderr]   10:     0x563df64dd9da - std::panicking::rust_panic_with_hook::h697f90879213769b
[INFO] [stderr]                                at src/libstd/panicking.rs:463
[INFO] [stderr]   11:     0x563df64a822b - std::panicking::begin_panic::hd6814f9c7ad7a6c9
[INFO] [stderr]                                at /rustc/30ca215b4e38b32aa7abdd635c5e2d56f5724494/src/libstd/panicking.rs:390
[INFO] [stderr]   12:     0x563df625fb86 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__static_ref_initialize::hd6c1b095b49f4a55
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:73
[INFO] [stderr]   13:     0x563df625fb86 - core::ops::function::FnOnce::call_once::h0b13c3e78878e9eb
[INFO] [stderr]                                at /rustc/30ca215b4e38b32aa7abdd635c5e2d56f5724494/src/libcore/ops/function.rs:232
[INFO] [stderr]   14:     0x563df626c490 - lazy_static::lazy::Lazy<T>::get::{{closure}}::h4be2cf5840855d65
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/inline_lazy.rs:28
[INFO] [stderr]   15:     0x563df6263e77 - std::sync::once::Once::call_once::{{closure}}::hba3554b0c7b5a333
[INFO] [stderr]                                at /rustc/30ca215b4e38b32aa7abdd635c5e2d56f5724494/src/libstd/sync/once.rs:264
[INFO] [stderr]   16:     0x563df64dabe1 - std::sync::once::Once::call_inner::hb3e1f3bb3ea9713c
[INFO] [stderr]                                at src/libstd/sync/once.rs:417
[INFO] [stderr]   17:     0x563df6263d53 - std::sync::once::Once::call_once::h645cbd3a0bd08298
[INFO] [stderr]                                at /rustc/30ca215b4e38b32aa7abdd635c5e2d56f5724494/src/libstd/sync/once.rs:264
[INFO] [stderr]   18:     0x563df625ca35 - lazy_static::lazy::Lazy<T>::get::h05b37b5b90f7679b
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/inline_lazy.rs:27
[INFO] [stderr]   19:     0x563df625ca35 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__stability::h42dc21af1c82d03f
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/<::lazy_static::__lazy_static_internal macros>:16
[INFO] [stderr]   20:     0x563df625ca35 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::h2426363211407159
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/<::lazy_static::__lazy_static_internal macros>:18
[INFO] [stderr]   21:     0x563df625a44a - build_script_build::llvm_config::hc581410a641fa511
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:167
[INFO] [stderr]   22:     0x563df625b8e0 - build_script_build::get_llvm_cflags::h71d3c4a2ad4e4d63
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:273
[INFO] [stderr]   23:     0x563df625bcd4 - build_script_build::main::h406097b4e7ee8580
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:300
[INFO] [stderr]   24:     0x563df625f1b0 - std::rt::lang_start::{{closure}}::hbb74d8a6e4f97860
[INFO] [stderr]                                at /rustc/30ca215b4e38b32aa7abdd635c5e2d56f5724494/src/libstd/rt.rs:67
[INFO] [stderr]   25:     0x563df64dd4a3 - std::rt::lang_start_internal::{{closure}}::h7ff682ecef2392c4
[INFO] [stderr]                                at src/libstd/rt.rs:52
[INFO] [stderr]   26:     0x563df64dd4a3 - std::panicking::try::do_call::h6e874d12a78bb537
[INFO] [stderr]                                at src/libstd/panicking.rs:296
[INFO] [stderr]   27:     0x563df64e5b6a - __rust_maybe_catch_panic
[INFO] [stderr]                                at src/libpanic_unwind/lib.rs:79
[INFO] [stderr]   28:     0x563df64dde80 - std::panicking::try::h21e662efa77e70e9
[INFO] [stderr]                                at src/libstd/panicking.rs:272
[INFO] [stderr]   29:     0x563df64dde80 - std::panic::catch_unwind::hcf22a1acd4d4cf4f
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   30:     0x563df64dde80 - std::rt::lang_start_internal::hf0c209ee2831e2b5
[INFO] [stderr]                                at src/libstd/rt.rs:51
[INFO] [stderr]   31:     0x563df625f189 - std::rt::lang_start::hb5f2219af8de8b62
[INFO] [stderr]                                at /rustc/30ca215b4e38b32aa7abdd635c5e2d56f5724494/src/libstd/rt.rs:67
[INFO] [stderr]   32:     0x563df625caca - main
[INFO] [stderr]   33:     0x7fcf8617eb97 - __libc_start_main
[INFO] [stderr]   34:     0x563df6258f5a - _start
[INFO] [stderr]   35:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "bad0721f9c7e425531259e49d20d8910c9d753b6eb3507612cbe148be99146a2"`
[INFO] running `"docker" "rm" "-f" "bad0721f9c7e425531259e49d20d8910c9d753b6eb3507612cbe148be99146a2"`
[INFO] [stdout] bad0721f9c7e425531259e49d20d8910c9d753b6eb3507612cbe148be99146a2