[INFO] fetching crate exonum-merkledb 1.0.0...
[INFO] checking exonum-merkledb-1.0.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate exonum-merkledb 1.0.0 into /workspace/builds/worker-31/source
[INFO] validating manifest of crates.io crate exonum-merkledb 1.0.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exonum-merkledb 1.0.0
[INFO] finished tweaking crates.io crate exonum-merkledb 1.0.0
[INFO] tweaked toml for crates.io crate exonum-merkledb 1.0.0 written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] crate crates.io crate exonum-merkledb 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rusty-fork v0.2.2
[INFO] [stderr]   Downloaded bstr v0.2.12
[INFO] [stderr]   Downloaded proptest v0.9.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c6238b0ce0a2ffac1d23c3536a19d472767f74bd46d1d12c25e84bbaa2023a3
[INFO] running `Command { std: "docker" "start" "-a" "5c6238b0ce0a2ffac1d23c3536a19d472767f74bd46d1d12c25e84bbaa2023a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c6238b0ce0a2ffac1d23c3536a19d472767f74bd46d1d12c25e84bbaa2023a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c6238b0ce0a2ffac1d23c3536a19d472767f74bd46d1d12c25e84bbaa2023a3", kill_on_drop: false }`
[INFO] [stdout] 5c6238b0ce0a2ffac1d23c3536a19d472767f74bd46d1d12c25e84bbaa2023a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93f629e7f8847432ad4fd12bae2fe5ddab33bf4313a118e86ff5d1f736002903
[INFO] running `Command { std: "docker" "start" "-a" "93f629e7f8847432ad4fd12bae2fe5ddab33bf4313a118e86ff5d1f736002903", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling protobuf v2.12.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling bindgen v0.53.2
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling lazycell v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]     Checking base64 v0.12.0
[INFO] [stderr]     Checking bit-vec v0.6.1
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking oorandom v11.1.0
[INFO] [stderr]     Checking leb128 v0.2.4
[INFO] [stderr]     Checking assert_matches v1.3.0
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr] error: could not compile `proc-macro2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name build_script_build --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-1.0.10/build.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="proc-macro"' -C metadata=6f2ac44c2015f5f3 -C extra-filename=-6f2ac44c2015f5f3 --out-dir /opt/rustwide/target/debug/build/proc-macro2-6f2ac44c2015f5f3 -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "93f629e7f8847432ad4fd12bae2fe5ddab33bf4313a118e86ff5d1f736002903", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93f629e7f8847432ad4fd12bae2fe5ddab33bf4313a118e86ff5d1f736002903", kill_on_drop: false }`
[INFO] [stdout] 93f629e7f8847432ad4fd12bae2fe5ddab33bf4313a118e86ff5d1f736002903
