[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#6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257 for pr-70872
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffexolm%2Fjfec" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fexolm/jfec on toolchain 6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "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-2/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" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "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] c04ad2f3209156e0fe34aa5c50c34af9681f186a08e709f5393b25da809c1b6e
[INFO] running `"docker" "start" "-a" "c04ad2f3209156e0fe34aa5c50c34af9681f186a08e709f5393b25da809c1b6e"`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cc v1.0.31
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling regex v1.1.5
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]     Checking either v1.5.1
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]     Checking rustc-demangle v0.1.13
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking cast v0.1.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]    Compiling pest v2.1.0
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]     Checking log v0.3.9
[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]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling pest_meta v2.1.0
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking criterion-plot v0.1.3
[INFO] [stderr]     Checking simplelog v0.4.4
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking criterion-stats v0.1.3
[INFO] [stderr]    Compiling llvm-sys v70.1.0
[INFO] [stderr]    Compiling pest_generator v2.1.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[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-9a960c0770de0089/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:     0x55e4f2099714 - backtrace::backtrace::libunwind::trace::hcdd38e03c5c0ae1d
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
[INFO] [stderr]    1:     0x55e4f2099714 - backtrace::backtrace::trace_unsynchronized::he5bd7c616dadfd7d
[INFO] [stderr]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
[INFO] [stderr]    2:     0x55e4f2099714 - std::sys_common::backtrace::_print_fmt::h5c76d4ca71f55821
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:78
[INFO] [stderr]    3:     0x55e4f2099714 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h2c8c63d62d7bea1c
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:59
[INFO] [stderr]    4:     0x55e4f20bf73c - core::fmt::write::h97d981a565c87982
[INFO] [stderr]                                at src/libcore/fmt/mod.rs:1069
[INFO] [stderr]    5:     0x55e4f2095a33 - std::io::Write::write_fmt::h76b54795ca4d1941
[INFO] [stderr]                                at src/libstd/io/mod.rs:1439
[INFO] [stderr]    6:     0x55e4f209bf85 - std::sys_common::backtrace::_print::h93fb2909159290d7
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:62
[INFO] [stderr]    7:     0x55e4f209bf85 - std::sys_common::backtrace::print::ha755c3134746c2d0
[INFO] [stderr]                                at src/libstd/sys_common/backtrace.rs:49
[INFO] [stderr]    8:     0x55e4f209bf85 - std::panicking::default_hook::{{closure}}::h3a7ab24b109d5437
[INFO] [stderr]                                at src/libstd/panicking.rs:198
[INFO] [stderr]    9:     0x55e4f209bcc2 - std::panicking::default_hook::h2aa3c18a39936382
[INFO] [stderr]                                at src/libstd/panicking.rs:218
[INFO] [stderr]   10:     0x55e4f209c5e2 - std::panicking::rust_panic_with_hook::h5035e60b675c5c99
[INFO] [stderr]                                at src/libstd/panicking.rs:511
[INFO] [stderr]   11:     0x55e4f207cf91 - std::panicking::begin_panic::h4edf020f54abe934
[INFO] [stderr]                                at /rustc/6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257/src/libstd/panicking.rs:438
[INFO] [stderr]   12:     0x55e4f1e35775 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__static_ref_initialize::h35528a67794b385a
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:73
[INFO] [stderr]   13:     0x55e4f1e35775 - core::ops::function::FnOnce::call_once::he576cf63bcdae7f2
[INFO] [stderr]                                at /rustc/6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257/src/libcore/ops/function.rs:232
[INFO] [stderr]   14:     0x55e4f1e406ab - lazy_static::lazy::Lazy<T>::get::{{closure}}::hdc7fb0f7b8105194
[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:     0x55e4f1e38602 - std::sync::once::Once::call_once::{{closure}}::h99992613a213a723
[INFO] [stderr]                                at /rustc/6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257/src/libstd/sync/once.rs:264
[INFO] [stderr]   16:     0x55e4f20991a8 - std::sync::once::Once::call_inner::h8cada63a1c4eac98
[INFO] [stderr]                                at src/libstd/sync/once.rs:416
[INFO] [stderr]   17:     0x55e4f1e383e3 - std::sync::once::Once::call_once::h2b4363af72bb95a5
[INFO] [stderr]                                at /rustc/6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257/src/libstd/sync/once.rs:264
[INFO] [stderr]   18:     0x55e4f1e31e75 - lazy_static::lazy::Lazy<T>::get::hfb01687378784cb4
[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:     0x55e4f1e31e75 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::__stability::h3370d47f741adf03
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/lib.rs:138
[INFO] [stderr]   20:     0x55e4f1e31e75 - <build_script_build::LLVM_CONFIG_PATH as core::ops::deref::Deref>::deref::hc164559979eab57a
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/lib.rs:140
[INFO] [stderr]   21:     0x55e4f1e2fac4 - build_script_build::llvm_config::hdf1543ff7c094750
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:167
[INFO] [stderr]   22:     0x55e4f1e30e50 - build_script_build::get_llvm_cflags::h5567bc351a89b6a1
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:273
[INFO] [stderr]   23:     0x55e4f1e31234 - build_script_build::main::h0acda952d1c1e9bd
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-70.1.0/build.rs:300
[INFO] [stderr]   24:     0x55e4f1e34c3b - std::rt::lang_start::{{closure}}::h7e0e73f77bfb64a6
[INFO] [stderr]                                at /rustc/6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257/src/libstd/rt.rs:67
[INFO] [stderr]   25:     0x55e4f209ca28 - std::rt::lang_start_internal::{{closure}}::h749f73f80f2a20f1
[INFO] [stderr]                                at src/libstd/rt.rs:52
[INFO] [stderr]   26:     0x55e4f209ca28 - std::panicking::try::do_call::h34ae69cab909f7d2
[INFO] [stderr]                                at src/libstd/panicking.rs:331
[INFO] [stderr]   27:     0x55e4f209ca28 - std::panicking::try::he6d9ae6f665ea78e
[INFO] [stderr]                                at src/libstd/panicking.rs:274
[INFO] [stderr]   28:     0x55e4f209ca28 - std::panic::catch_unwind::hb821659e1ed61148
[INFO] [stderr]                                at src/libstd/panic.rs:394
[INFO] [stderr]   29:     0x55e4f209ca28 - std::rt::lang_start_internal::hc7231d8ca9ca0aea
[INFO] [stderr]                                at src/libstd/rt.rs:51
[INFO] [stderr]   30:     0x55e4f1e34c17 - std::rt::lang_start::hc20e26f55bbe6b6b
[INFO] [stderr]                                at /rustc/6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257/src/libstd/rt.rs:67
[INFO] [stderr]   31:     0x55e4f1e31f0a - main
[INFO] [stderr]   32:     0x7fc841f2eb97 - __libc_start_main
[INFO] [stderr]   33:     0x55e4f1e2e73a - _start
[INFO] [stderr]   34:                0x0 - <unknown>
[INFO] [stderr] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c04ad2f3209156e0fe34aa5c50c34af9681f186a08e709f5393b25da809c1b6e"`
[INFO] running `"docker" "rm" "-f" "c04ad2f3209156e0fe34aa5c50c34af9681f186a08e709f5393b25da809c1b6e"`
[INFO] [stdout] c04ad2f3209156e0fe34aa5c50c34af9681f186a08e709f5393b25da809c1b6e