[INFO] crate llvm-alt 0.5.0 is already in cache
[INFO] checking llvm-alt-0.5.0 against master#ba72b15666b2491415aec703a02c2364fe5e2790 for pr-71140
[INFO] extracting crate llvm-alt 0.5.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate llvm-alt 0.5.0 on toolchain ba72b15666b2491415aec703a02c2364fe5e2790
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate llvm-alt 0.5.0
[INFO] finished tweaking crates.io crate llvm-alt 0.5.0
[INFO] tweaked toml for crates.io crate llvm-alt 0.5.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ba72b15666b2491415aec703a02c2364fe5e2790" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+ba72b15666b2491415aec703a02c2364fe5e2790" "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] 6fbad4c4d5fe120b6f790b52451c0845c788e0aeef73bf688ad0f706c42cfd64
[INFO] running `"docker" "start" "-a" "6fbad4c4d5fe120b6f790b52451c0845c788e0aeef73bf688ad0f706c42cfd64"`
[INFO] [stderr]    Compiling llvm-alt v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling llvm-sys v100.0.1
[INFO] [stderr] error: No suitable version of LLVM was found system-wide or pointed
[INFO] [stderr]        to by LLVM_SYS_100_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]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/llvm-sys-100.0.1/src/lib.rs:483:1
[INFO] [stderr]     |
[INFO] [stderr] 483 | / std::compile_error!(concat!(
[INFO] [stderr] 484 | |       "No suitable version of LLVM was found system-wide or pointed
[INFO] [stderr] 485 | |        to by LLVM_SYS_", env!("CARGO_PKG_VERSION_MAJOR"), "_PREFIX.
[INFO] [stderr] 486 | |
[INFO] [stderr] ...   |
[INFO] [stderr] 490 | |        llvm-sys: https://crates.io/crates/llvm-sys
[INFO] [stderr] 491 | |        llvmenv: https://crates.io/crates/llvmenv"));
[INFO] [stderr]     | |____________________________________________________^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `llvm-sys`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6fbad4c4d5fe120b6f790b52451c0845c788e0aeef73bf688ad0f706c42cfd64"`
[INFO] running `"docker" "rm" "-f" "6fbad4c4d5fe120b6f790b52451c0845c788e0aeef73bf688ad0f706c42cfd64"`
[INFO] [stdout] 6fbad4c4d5fe120b6f790b52451c0845c788e0aeef73bf688ad0f706c42cfd64